Gibberellic acid · Yield · Solanum lycopersicum (tomato)

Results differ56 papers: 51 positive, 5 negative or no effect · 24 pairs of papers confirmed to differ

147 claims from these papers; 10 citations between them.

Papers whose results differ, checked claim by claim 24

24 pairs of papers on this question report results that differ: an effect in one paper, the opposite effect or no effect in the other. Two model reviewers reading both claims accepted each pair.

Application of Plant Growth Regulators on Fruits and Vegetables for Processing (1972)
decreaseGA3 reduced tomato fruit size and yield.
Effect of Nutrients and Plant Growth Regulator on Yield and Biochemical Parameter of Tomato (Lycopersicum esculentum L.) (2014)
increaseGA3 at 20 ppm effectively increased tomato height, leaves, fruit diameter and fruit number.
What separates themDose: 25–50 mg/L · 20 mg/LCompare the two papers →
Fruit Set and Yield Enhancement in Tomato (Lycopersicon esculentum Mill.) Using Gibberellic Acid and 2,4-Dichlorophenoxy Acetic Acid Spray (2015)
increaseA 10mgL -1 GA 3 spray increased fruit set 14.2% relative to unsprayed tomato.
Drought, Paclobutrazol, Abscisic Acid, and Gibberellic Acid as Alternatives to Daminozide in Tomato Transplant Production (1992)
decreaseGA reduced fruit number.
What separates themTest system: controlled environment · fieldCompare the two papers →
Genotypic and Chemical Influences on Fruit Growth of Tomato (1990)
no changeGA did not affect fruit size.
Effect of Naphthalene Acetic Acid (NAA) and Gibberellic Acid (GA3) on Growth and Fruit Quality of Tomato (Lycopersicon esculentum Mill.) (2018)
increaseGA3 significantly improved tomato fruit weight.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Effects of Gibberellic acid and 2,4-dichloro-phenoxyacetic acid spray on fruit yield and quality of tomato (Lycopersicon esculentum Mill.) (2010)
increaseGA3 increased fruit number.
Effect of exogenous application of gibberellin on growth, fruit yield and quality of tomato (2023)
no changeAt 50 ppm GA3, percent fruit set and fruit count per plant were similar to tomato plants without GA3.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Drought, Paclobutrazol, Abscisic Acid, and Gibberellic Acid as Alternatives to Daminozide in Tomato Transplant Production (1992)
decreaseGA reduced fruit number.
Effect of GA3 on Biochemical Attributes and Yield of Summer Tomato (2015)
increaseRoot soaking with 50 ppm GA3 significantly increased flower number, fruit number and fruit yield per plant.
What separates themTest system: field · controlled environmentCompare the two papers →
Drought, Paclobutrazol, Abscisic Acid, and Gibberellic Acid as Alternatives to Daminozide in Tomato Transplant Production (1992)
decreaseGA reduced total fruit yield in 1988.
Effect of Foliar Application of Plant Growth Regulators on Growth, Flowering and Yield of Tomato (Lycopersicon Esculentum l.) Under Protected Condition (2025)
increaseGA3 at 25 ppm significantly increased tomato yield to 60.83 ton/ha.
What separates themTest system: field · controlled environmentCompare the two papers →

Show 18 more pairs

Application of Plant Growth Regulators on Fruits and Vegetables for Processing (1972)
decreaseGA3 reduced tomato fruit size and yield.
Amendment of hydroponic nutrient solution with humic acid and glutamic acid in tomato (Lycopersicon esculentumMill.) culture (2013)
increaseGA improved tomato yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Application of Plant Growth Regulators on Fruits and Vegetables for Processing (1972)
decreaseGA3 reduced tomato fruit size and yield.
Potential impacts of gibberellic acid to promote salinity tolerance in tomato (2025)
increaseGA3 foliar spray increased tomato yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Drought, Paclobutrazol, Abscisic Acid, and Gibberellic Acid as Alternatives to Daminozide in Tomato Transplant Production (1992)
decreaseGA reduced fruit number.
Effect of Gibberellic Acid and Potassium Nitrate Spray on Vegetative Growth and Reproductive Characteristics of Tomato (2014)
increaseGibberellic acid increased tomato growth, flower and fruit traits.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Drought, Paclobutrazol, Abscisic Acid, and Gibberellic Acid as Alternatives to Daminozide in Tomato Transplant Production (1992)
decreaseGA reduced total fruit yield in 1988.
Effect of Plant Growth Regulators on Growth and Yield Attributes of Tomato (Solanum lycopersicom Mill.) (2019)
increaseGA3 at 30 ppm increased fruit yield per plant in tomato (1320.0 g).
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Response of various plant growth regulators on growth, yield and yield attributing traits of tomato (Solanum lycopersicum L) cv. Heemsohna under protected structure (2022)
increaseFoliar GA3 at 50 ppm significantly increased number of fruits per plant in tomato, with a reported value of 3.48.
Effect of exogenous application of gibberellin on growth, fruit yield and quality of tomato (2023)
no changeAt 50 ppm GA3, percent fruit set and fruit count per plant were similar to tomato plants without GA3.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Effect of Nutrients and Plant Growth Regulator on Yield and Biochemical Parameter of Tomato (Lycopersicum esculentum L.) (2014)
increaseGA3 at 20 ppm effectively increased tomato height, leaves, fruit diameter and fruit number.
Effect of exogenous application of gibberellin on growth, fruit yield and quality of tomato (2023)
no changeAt 50 ppm GA3, percent fruit set and fruit count per plant were similar to tomato plants without GA3.
What separates themDose: 20 mg/L · 50 mg/LCompare the two papers →
Genotypic and Chemical Influences on Fruit Growth of Tomato (1990)
no changeGA did not affect fruit size.
Application of Plant Growth Regulators on Fruits and Vegetables for Processing (1972)
decreaseGA3 reduced tomato fruit size and yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Genotypic and Chemical Influences on Fruit Growth of Tomato (1990)
no changeGA did not affect fruit size.
Effect of Nutrients and Plant Growth Regulator on Yield and Biochemical Parameter of Tomato (Lycopersicum esculentum L.) (2014)
increaseGA3 at 20 ppm effectively increased tomato height, leaves, fruit diameter and fruit number.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Application of Plant Growth Regulators on Fruits and Vegetables for Processing (1972)
decreaseGA3 reduced tomato fruit size and yield.
Fruit Set and Yield Enhancement in Tomato (Lycopersicon esculentum Mill.) Using Gibberellic Acid and 2,4-Dichlorophenoxy Acetic Acid Spray (2015)
increaseA 10mgL -1 GA 3 spray increased fruit set 14.2% relative to unsprayed tomato.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Application of Plant Growth Regulators on Fruits and Vegetables for Processing (1972)
decreaseGA3 reduced tomato fruit size and yield.
Effect of Naphthalene Acetic Acid (NAA) and Gibberellic Acid (GA3) on Growth and Fruit Quality of Tomato (Lycopersicon esculentum Mill.) (2018)
increaseGA3 significantly improved tomato fruit weight.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Application of Plant Growth Regulators on Fruits and Vegetables for Processing (1972)
decreaseGA3 reduced tomato fruit size and yield.
Effect of GA3 on Biochemical Attributes and Yield of Summer Tomato (2015)
increaseRoot soaking with 50 ppm GA3 significantly increased flower number, fruit number and fruit yield per plant.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Application of Plant Growth Regulators on Fruits and Vegetables for Processing (1972)
decreaseGA3 reduced tomato fruit size and yield.
Effect of Foliar Application of Plant Growth Regulators on Growth, Flowering and Yield of Tomato (Lycopersicon Esculentum l.) Under Protected Condition (2025)
increaseGA3 at 25 ppm significantly increased tomato yield to 60.83 ton/ha.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Effect of Nutrients and Plant Growth Regulator on Yield and Biochemical Parameter of Tomato (Lycopersicum esculentum L.) (2014)
increaseGA3 at 20 ppm effectively increased tomato height, leaves, fruit diameter and fruit number.
Drought, Paclobutrazol, Abscisic Acid, and Gibberellic Acid as Alternatives to Daminozide in Tomato Transplant Production (1992)
decreaseGA reduced fruit number.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Effects of Gibberellic acid and 2,4-dichloro-phenoxyacetic acid spray on fruit yield and quality of tomato (Lycopersicon esculentum Mill.) (2010)
increaseGA3 increased fruit number.
Drought, Paclobutrazol, Abscisic Acid, and Gibberellic Acid as Alternatives to Daminozide in Tomato Transplant Production (1992)
decreaseGA reduced fruit number.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Fruit Set and Yield Enhancement in Tomato (Lycopersicon esculentum Mill.) Using Gibberellic Acid and 2,4-Dichlorophenoxy Acetic Acid Spray (2015)
increaseA 10mgL -1 GA 3 spray increased fruit set 14.2% relative to unsprayed tomato.
Effect of exogenous application of gibberellin on growth, fruit yield and quality of tomato (2023)
no changeAt 50 ppm GA3, percent fruit set and fruit count per plant were similar to tomato plants without GA3.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Drought, Paclobutrazol, Abscisic Acid, and Gibberellic Acid as Alternatives to Daminozide in Tomato Transplant Production (1992)
decreaseGA reduced fruit number.
Effect of exogenous application of gibberellin on growth, fruit yield and quality of tomato (2023)
no changeAt 50 ppm GA3, percent fruit set and fruit count per plant were similar to tomato plants without GA3.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Drought, Paclobutrazol, Abscisic Acid, and Gibberellic Acid as Alternatives to Daminozide in Tomato Transplant Production (1992)
decreaseGA reduced total fruit yield in 1988.
Potential impacts of gibberellic acid to promote salinity tolerance in tomato (2025)
increaseGA3 foliar spray increased tomato yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Effect of GA3 on Biochemical Attributes and Yield of Summer Tomato (2015)
increaseRoot soaking with 50 ppm GA3 significantly increased flower number, fruit number and fruit yield per plant.
Effect of exogenous application of gibberellin on growth, fruit yield and quality of tomato (2023)
no changeAt 50 ppm GA3, percent fruit set and fruit count per plant were similar to tomato plants without GA3.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →

How these papers cite each other

10 citations between these papers: 8 on the same side, 2 across the two sides.

Positive result
Negative result or no effect
Citation, pointing to the cited paper
Citation across the two sides
Larger circle: more citations overall

Years run left to right. Citations come from the papers’ OpenAlex reference lists. Hover a paper to bring forward its citations; click it to open the paper.

Papers reporting a positive result 51

Application of Plant Growth Regulators on Fruits and Vegetables for Processing · 1972
- positive
  GA3 25ppm with PCPA 7.5ppm on clusters produced the heaviest yield with fruit nitrate below 3ppm.
- negative
  GA3 reduced tomato fruit size and yield.
FLOWER DEVELOPMENT IN NORMAL TOMATO AND A GIBBERELLIN‐DEFICIENT (ga‐2) MUTANT · 1988
- positive
  GA application to a developing inflorescence or stem tip completed flower bud development and fruit set.
cited by 1 paper here
Fruit Set and Development in Potted Tomato, Lycopersicon Lycopersicum (L.) Karsten, Treated with Gibberellic Acid (Ga3) · 2006
- positive
  Five ppm GA3 applied after anthesis significantly improved tomato yield.
  compared with other treatments
- positive
  GA3 treatment gave treated tomatoes more than 200 % return on investment.
- positive
  Five ppm GA3 applied before anthesis significantly improved tomato return on investment.
  compared with other treatments
- positive
  Five ppm GA3 applied before anthesis significantly improved tomato yield.
  compared with other treatments
- positive
  Five ppm GA3 applied after anthesis significantly improved tomato return on investment.
  compared with other treatments
Gibberellin Regulation of Fruit Set and Growth in Tomato · 2007
- positive
  GA(3) application reversed the inhibitor effects on tomato fruit growth and set.
Effects of Gibberellic acid and 2,4-dichloro-phenoxyacetic acid spray on fruit yield and quality of tomato (Lycopersicon esculentum Mill.) · 2010
- positive
  Fetan yield increased 18% with combined 2,4-D and GA3 over control.
  compared with control
- positive
  GA3 increased fruit number.
- positive
  Roma VF yielded 69.50 ton ha-1 with 10 mg l-1 GA3 without 2,4-D.
- positive
  Combined 2,4-D and GA3 increased tomato fruit length from 5.44 to 6.72 cm.
  compared with control
- negative
  GA3 alone or with 2,4-D reduced tomato fruit weight.
cited by 1 paper here
Effect of bio-regulators on performance of tomato under naturally ventilated polyhouse during off-season · 2011
- positive
  Applying 25 ppm GA3 at flowering and 15 days later gave the highest fruit yield per plant per m2 in July.
- positive
  Applying 25 ppm GA3 at flowering and 15 days later gave the highest fruit yield per plant per m2 in August.
Amendment of hydroponic nutrient solution with humic acid and glutamic acid in tomato (Lycopersicon esculentumMill.) culture · 2013
- positive
  GA improved tomato yield.
Sinergism among auxins, gibberellins and cytokinins in tomato cv. Micro-Tom · 2013
- positive
  Some combined hormone applications significantly increased root dry matter.
  compared with the control
Effect of Nutrients and Plant Growth Regulator on Yield and Biochemical Parameter of Tomato (Lycopersicum esculentum L.) · 2014
- positive
  GA3 at 20 ppm effectively increased tomato height, leaves, fruit diameter and fruit number.
Effect of Gibberellic Acid and Potassium Nitrate Spray on Vegetative Growth and Reproductive Characteristics of Tomato · 2014
- positive
  Gibberellic acid increased tomato growth, flower and fruit traits.
cited by 1 paper here
Fruit Set and Yield Enhancement in Tomato (Lycopersicon esculentum Mill.) Using Gibberellic Acid and 2,4-Dichlorophenoxy Acetic Acid Spray · 2015
- positive
  Combined GA 3 and 2,4-D at 5mgL -1 each gave the highest fruit set, 62.5%.
- positive
  A 10mgL -1 GA 3 spray increased fruit set 14.2% relative to unsprayed tomato.
  compared with unsprayed
Effect of GA3 on Biochemical Attributes and Yield of Summer Tomato · 2015
- positive
  Root soaking with 50 ppm GA3 significantly increased flower number, fruit number and fruit yield per plant.
cited by 2 papers here
Effect of Different Levels of NAA, GA₃and 2, 4-D on Growth and Yield of Tomato(Lycopersicon EsculentumMill.) · 2016
- positive
  The specified GA3, NAA and 2, 4-D combination significantly increased total tomato yield to 523 q/h.
cited by 1 paper here
Effect of growth regulators and fruit retention on fruit set, seed yield and quality of tomato parental lines · 2016
- positive
  GA 3 with all fruit gave higher fruit yield than other combinations.
- positive
  GA 3 with all fruit gave higher seed yield than other combinations.
Interaction Effect of Seedling Age and Different Doses of GA3 on Growth and Yield of Tomato (Lycopersicon Esculentum Mill.) · 2017
- positive
  The combination of 125 ppm GA3 with 30-day-old seedlings gave the maximum tomato yield of 90.28 t/ha.
- negative
  The combination of no GA3 with 20-day-old seedlings gave the minimum tomato yield of 59.83 t/ha.
Effect of Naphthalene Acetic Acid (NAA) and Gibberellic Acid (GA3) on Growth and Fruit Quality of Tomato (Lycopersicon esculentum Mill.) · 2018
- positive
  GA3 significantly improved tomato fruit number.
- positive
  GA3 significantly improved tomato fruit weight.
- positive
  GA3 at 80 ppm produced the maximum tomato yield.
cited by 2 papers here
Effect of Plant Growth Regulator on Growth, Yield & Quality of Tomato (Solanum lycopericum) Cultivar ‘Shivaji’ under Punjab Condition · 2018
- positive
  Growth, phenological and yield parameters of tomato were significantly superior at different GA3, NAA and kinetin concentrations compared with the control.
  compared with control treatment
Productive and qualitative performance of tomato plants as a function of the application of plant growth regulators and mineral nutrients · 2018
- positive
  Isolated Ax+CK+GA and Mi improved tomato plant productivity.
Impact of phyto-chemicals with nutrients on growth analytical traits and yield of tomato · 2018
- positive
  Foliar spray of 2% urea with 20 ppm gibberellic acid gave the next highest tomato fruit yield, 32.13 t ha-1.
Effect of NAA, GA3 on growth and yield of tomato varieties · 2018
- positive
  15 ppm GA3 followed by 25 ppm NAA improved tomato growth and yield.
Impact of foliar application of different levels of GA3 and NAA on reproductive and quality parameters of tomato (Solanum Lycopersicum L.) · 2018
- positive
  GA3 at 50 ppm gave a significantly higher number of fruit per cluster of 6.73 than the other treatments.
  compared with all the treatments
- positive
  GA3 at 50 ppm gave a significantly higher yield of 531.74 q/ha than the other treatments.
  compared with all the treatments
- positive
  GA3 at 50 ppm gave a significantly higher number of fruit per plant of 20.60 than the other treatments.
  compared with all the treatments
- positive
  GA3 at 50 ppm gave a significantly higher fruit weight of 61.95 g than the other treatments.
  compared with all the treatments
- positive
  GA3 at 50 ppm gave a significantly higher fruit diameter of 5.05 cm than the other treatments.
  compared with all the treatments
- positive
  GA3 at 50 ppm gave a significantly higher number of cluster per plant of 7.07 than the other treatments.
  compared with all the treatments
- positive
  GA3 at 50 ppm gave a significantly higher fruit length of 4.75 cm than the other treatments.
  compared with all the treatments
- positive
  GA3 at 50 ppm gave a significantly higher fruit set of 65.09 % than the other treatments.
  compared with all the treatments
Effect of Plant Growth Regulators on Growth and Yield Attributes of Tomato (Solanum lycopersicom Mill.) · 2019
- positive
  GA3 at 30 ppm increased fruit yield per plant in tomato (1320.0 g).
- positive
  GA3 at 30 ppm gave the maximum number of fruit per plant in tomato (46.06).
- positive
  GA3 at 30 ppm significantly increased fruit yield per hectare in tomato (52.5 t/ha).
Influence of Calcium chloride and Gibberellic acid levels on the growth, yield and quality of tomato in the agro-climatic conditions of Mardan-Pakistan · 2019
- positive
  GA3 at 75 ppm maximized branches per plant at 8.18.
- positive
  GA3 at 75 ppm maximized plot yield at 8 kg.
- positive
  GA3 at 75 ppm maximized hectare yield at 22tons.
- positive
  GA3 at 75 ppm maximized yield per plant at 2.0kg.
- positive
  GA3 at 75 ppm maximized cost benefit ratio at 1.8.
cites 1 paper here
STUDIES ON THE EFFECT OF DIFFERENT PLANT GROWTH REGULATORS ON GROWTH, YIELD AND QUALITY ATTRIBUTES OF TOMATO (Solanum lycopersicum L.) CV. KASHI AMRIT · 2019
- positive
  GA3 at 50 ppm gave average fruit weight of 1500g.
- positive
  GA3 at 50 ppm gave number of leaves per plant of 35.67.
- positive
  GA3 at 50 ppm gave fruit diameter of 5.16cm.
- positive
  GA3 at 50 ppm gave yield per ha. of 555.55qt.
- positive
  GA3 at 50 ppm gave fruit length of 4.96cm.
- positive
  GA3 at 50 ppm gave number of branches in per plant of 16.34.
- positive
  GA3 at 50 ppm gave no. of fruits per plant of 52.67.
- positive
  GA3 at 50 ppm gave yield per plot of 33kg.
Effects of Gibberellic acid, micronutrient fertilizer and Calcium nitrate foliar fertilizer on growth and yield of tomato Solanum lycopersicum L. cultivated in Vietnam · 2019
- positive
  Each separate supplement increased yield above control but below mixed formulas.
  compared with control
- positive
  GA3 plus micronutrient fertilizer gave yield of 46.55 tons ha-1.
- positive
  GA3 plus calcium nitrate gave tomato yield of 47.31 tons ha-1.
- positive
  Foliar treatments improved tomato growth indicators over control.
  compared with control
- positive
  Combined GA3, micronutrient fertilizer and calcium nitrate gave highest tomato yield of 50.73 tons ha-1.
Effect of Foliar Application of Gibberellin in Mitigating Salt Stress in Tomato (Solanum Lycopersicum), 'Thilina' Variety · 2019
- positive
  GA3 increased branches by 24.0% versus water spray under NaCl stress.
  compared with water sprayed NaCl-treated control plants
Effects of Foliar Application of Indol Butyric Acid(IBA), Gibberellic Acid (GA3) and Zinc (Zn) on Yield and Quality of Tomato · 2020
- positive
  The T4 combination also yielded the reported maximum of 100.00 t/ha.
- positive
  The T7 combination yielded 100.00 t/ha tomato, the reported maximum.
Influence of plant growth regulators on growth, yield, and quality of tomato grown under high temperature in the tropics in the summer · 2020
- positive
  Combined 50 mg GA3 and 20 mg 4-CPA produced the greatest tomato yield at 46.1 t per hectare.
  compared with 0
Effect of Different Plant Growth Regulators on Growth and Yield of Tomato (Lycopersicon esculentum) · 2020
- positive
  Combined application of IBA and GA3 at 25 ppm gave the maximum number of fruits per tomato plant (55.5).
- positive
  Combined application of IBA and GA3 at 25 ppm gave the maximum tomato yield (39.6 MT/ha).
- positive
  Combined application of IBA and GA3 at 25 ppm gave the maximum individual fruit weight of tomato (19.1 gm).
Effects of foliar application of indol butyric acid(IBA), gibberellic acid(GA3) and zinc(Zn) on growth and yield of tomato · 2020
- positive
  IBA plus GA3 plus Zn gave maximum fruit yield of 100 tones per hectare.
Effect of micronutrients and PGR on growth and yield of tomato (Solanum lycopersicum L.) Variety Azad-T6 · 2021
- positive
  GA3 at 100ppm produced the highest plant height and branch count.
- positive
  GA3 at 100ppm was associated with earlier 50% flowering and first fruit set.
Effect of Plant Growth Regulators on Growth and Yield of Tomato (Lycopersicon esculentum L.) · 2022
- positive
  GA3 at 30 ppm gave tomato fruit yield per plant of 3.90 kg.
- positive
  GA3 at 30 ppm gave tomato number of clusters per plant of 36.66.
- positive
  GA3 at 30 ppm gave tomato fruit yield per hectare of 58.5 t.
- positive
  GA3 at 30 ppm gave tomato fruits per plant of 55.33.
cites 2 papers here
Response of various plant growth regulators on growth, yield and yield attributing traits of tomato (Solanum lycopersicum L) cv. Heemsohna under protected structure · 2022
- positive
  Foliar GA3 at 50 ppm significantly increased number of branches per plant in tomato, with a reported value of 22.56.
- positive
  Foliar GA3 at 50 ppm significantly increased number of flowers per plant in tomato, with a reported value of 30.11.
- positive
  Foliar GA3 at 50 ppm significantly increased number of cluster per plant in tomato, with a reported value of 11.11.
- positive
  Foliar GA3 at 50 ppm significantly increased yield in tomato, with a reported value of 3.48 kg/plant and 31.35 kg/plot.
- positive
  Foliar GA3 at 50 ppm significantly increased number of fruits per plant in tomato, with a reported value of 3.48.
Effect of GA3 and NAA on tomato production under protected cultivation in Kaski, Nepal · 2022
- positive
  GA3 at 50 ppm increased tomato yield by 13.91% over GA3 at 0 ppm.
  compared with GA3 @ 0 ppm
- positive
  GA3 at 50 ppm increased tomato yield by 10.31% over GA3 at 25 ppm.
  compared with GA3 @ 25 ppm
- positive
  GA3 at 50 ppm increased tomato yield by 6.74% over GA3 at 75 ppm.
  compared with GA3 @ 75 ppm
- positive
  GA3 at 50 ppm gave a significantly higher tomato yield (103.46 metric ton/ha) than GA3 at 0, 25 and 75 ppm.
  compared with GA3 @ 0 ppm, GA3 @ 25 ppm and GA3 @ 75 ppm
cites 1 paper herecited by 2 papers here
Effect of plant growth regulators and their spray schedule on growth parameters and fruit yield of tomato (Lycopersicon esculentum Mill.) under protected cultivation · 2023
- positive
  GA3 at 75 ppm produced the earliest first harvest in both years.
- positive
  GA3 at 75 ppm gave the highest fruit yield per plant in both years.
Effect of Plant Growth Regulators on the Growth, Yield and Quality of Tomato (Solanum lycopersicum L.) · 2023
- positive
  T18 gave the best number of fruits per plant, 17.27.
- positive
  T18 gave the best total yield per plant, 5.84 kg.
- positive
  T18 gave the best days to first harvest, 85.63 DAT.
- positive
  T18 gave the best fruit yield per hectare, 216.3 t.
- positive
  T18 gave the best average fruit yield per plant, 1.95 kg.
- positive
  T18 gave the best fruit set per cluster, 8.07.
- positive
  T18 gave the best individual fruit weight, 112.63 g.
Effect of Plant Growth Regulator (GA3 and NAA) on Growth, Yield and Quality of Tomato (Solanum lycopersicum L.) · 2023
- positive
  Increased NAA and GA3 significantly improved tomato growth and yield.
EFFECT OF VARIOUS CONCENTRATIONS OF GIBBERELLIC ACID ON GROWTH PERFORMANCE AND YIELD OF TOMATO IN FIELD CONDITIONS IN DHADING DISTRICT, NEPAL · 2023
- positive
  The 50 ppm GA3 treatment gave the highest flower, fruit number and fruit yield.
  compared with control group (0 ppm GA3)
cites 1 paper here
Effect of exogenous application of gibberellin on growth, fruit yield and quality of tomato · 2023
- positive
  Applying GA3 at 50 ppm gave a higher fruit yield per plot and per hectare than a higher concentration.
  compared with a higher concentration
- positive
  Applying GA3 at 50 ppm gave a higher percent fruit set and fruit count per plant than a higher concentration.
  compared with a higher concentration
- no effect
  At 50 ppm GA3, percent fruit set and fruit count per plant were similar to tomato plants without GA3.
  compared with tomato plants without GA 3
Effect of NAA and GA3 on quality and fruit yield of Tomato (Solanum lycopersicum Mill.) · 2024
- positive
  Fruit yield per hectare of tomato under NAA at 20 ppm and GA3 at 90 ppm reached 99.62 tons, significantly higher than the control and other treatments.
  compared with control and other treatments
- negative
  Lower levels of NAA and GA3, or their absence, gave comparatively lower tomato fruit yield.
Influence of Boron and Gibberellic Acid on Growth and Yield of Summer Tomato · 2024
- positive
  Combined GA3 and boron produced the highest fruit weight per plant, 964.21g.
- positive
  GA3 at 50 ppm gave higher fruit weight and yield per plant than boron at 100 ppm.
  compared with Boron @ 100 ppm
- positive
  Combined GA3 and boron produced the highest total yield, 33.06 t ha-1.
- positive
  Combined GA3 and boron produced the highest fruits per plant, 17.72.
Response of Foliar Sprays of Plant Growth Regulators and Micronutrients and Their Combinations on Morphological, Flowering and Yield Attributing Traits of Tomato at North -Bihar Condition · 2024
- positive
  The spray produced greatest branch number at 60 days, 10 per plant.
- positive
  The spray produced maximum yield per hectare, 29.31 tons.
- positive
  The spray produced maximum fruit yield per plant, 1.53 kg.
- positive
  The spray produced highest leaf number at 75 days, 199.1 per plant.
- positive
  The spray produced greatest branch number at 75 days, 13.4 per plant.
- positive
  The spray produced maximum average fruit weight, 65.02 g.
- positive
  The spray produced highest leaf number at 60 days, 160.1 per plant.
Effect of PGRs on growth, reproductive efficiency, and quality of tomato (Solanum lycopersicum) in arid regions · 2024
- positive
  GA3@75 ppm produced number of branches of 19.4/plant in tomato.
  compared with control
Effect of micronutrients and PGRs on growth and yield of Tomato (Solanum lycopersicum L.) cv. Azad-T6 · 2024
- positive
  Micronutrients and growth regulators enhanced vegetative growth, flowering and yield.
Potential impacts of gibberellic acid to promote salinity tolerance in tomato · 2025
- positive
  GA3 foliar spray increased tomato yield.
Efficacy of Mixed Fertilizers (NPK) and Gibberellic Acid (GA3) Solution on Growth and Yield of Quality Tomato (Lycopersicon esculentum Mill.) · 2025
- positive
  GA3 at 50 ppm produced the highest yield, 41 t/ha, versus 37.17 t/ha in controls.
  compared with control
- positive
  Combined 225 kg N/ha + 125 kg P/ha + 180 kg K/ha and 50 ppm GA3 yielded 44 t/ha versus 34 t/ha in controls.
  compared with control
Response of Organic Manures and Gibberellic Acid (GA₃) on Growth and Yield of Tomato (Lycopersicon esculentum L.) · 2025
- positive
  GA3 at 75 ppm gave the highest fruit weight, 61.0 g, in tomato.
- positive
  Organic manures and GA3 had a significant positive impact on tomato plant growth and fruit yield parameters.
Effect of Foliar Application of Plant Growth Regulators on Growth, Flowering and Yield of Tomato (Lycopersicon Esculentum l.) Under Protected Condition · 2025
- positive
  GA3 at 25 ppm significantly increased tomato yield to 60.83 ton/ha.
cites 2 papers here
Effects of growth regulators and micronutrients on the growth, yield and quality of Tomato (Solanum lycopersicum L.) cv. Kashi Aman · 2025
- positive
  GA 50 ppm with micronutrient mixture produced the highest average fruit weight (112.42 gm at 4th picking) in Kashi Aman tomato.
  compared with control (T12)
- positive
  GA 50 ppm with micronutrient mixture produced the highest yield/plant (2.45 kg) in Kashi Aman tomato.
  compared with control (T12)
- positive
  GA 50 ppm with micronutrient mixture produced the highest number of fruits per plant (36.70) in Kashi Aman tomato.
  compared with control (T12)
- positive
  GA 50 ppm with micronutrient mixture produced the highest number of branches per plant (13.21) in Kashi Aman tomato.
  compared with control (T12)
- positive
  GA 50 ppm with micronutrient mixture produced the highest benefit: cost ratio (4.47) in Kashi Aman tomato.
  compared with control (T12)
- positive
  GA 50 ppm with micronutrient mixture produced the highest yield/ha (556.80 q) in Kashi Aman tomato.
  compared with control (T12)
- positive
  GA 50 ppm with micronutrient mixture produced the highest yield/plot (72.16 kg) in Kashi Aman tomato.
  compared with control (T12)
- positive
  GA 50 ppm with micronutrient mixture produced the highest net return (Rs. 4,09,440/ha) in Kashi Aman tomato.
  compared with control (T12)
cites 1 paper here
The effect of micronutrients and GA3 on growth and yield of tomato (Lycopersicon esculentum Mill.) cv. Kashi Chayan · 2025
- positive
  GA3 at 100ppm gave the best result for fruit yield (q/ha).
  compared with Control
- positive
  GA3 at 100ppm gave the best result for days to 50% flowering, days to first fruit set.
  compared with Control
- positive
  GA3 at 100ppm gave the best result for fruit length (cm), fruit width (cm), fruit yield per plant (kg).
  compared with Control
- positive
  GA3 at 100ppm gave the best result for no. of fruit per cluster, no. of fruit plant-1, average fruit weight (g).
  compared with Control
- positive
  GA3 at 100ppm gave the highest result for plant height (cm), number of branches plant-1, number of flower cluster-1.
  compared with Control
Effect of plant growth regulators on growth and yield attributes of tomato (Solanum lycopersicum L.) · 2025
- positive
  Foliar GA3 at 85 ppm maximized fruit set, at 83.1%.
- positive
  Foliar GA3 at 85 ppm maximized yield per plant, at 1.40 kg.
- positive
  Foliar GA3 at 85 ppm maximized fruit diameter, at 5.8 cm.
- positive
  Foliar GA3 at 85 ppm maximized fruits per plant, at 20.1.
- positive
  Foliar GA3 at 85 ppm maximized fruits per cluster, at 4.1.
- positive
  Foliar GA3 at 85 ppm maximized average fruit weight, at 68.2 g.

Papers reporting a negative result or no effect 5

Gibberellic acid induced multilocular fruits in tomato and the role of locule number and seed number in fruit size · 1978
- no effect
  GA3 did not increase seeds per fruit relative to controls.
  compared with controls
Genotypic and Chemical Influences on Fruit Growth of Tomato · 1990
- no effect
  GA did not affect fruit size.
Drought, Paclobutrazol, Abscisic Acid, and Gibberellic Acid as Alternatives to Daminozide in Tomato Transplant Production · 1992
- negative
  GA reduced fruit number.
- negative
  GA reduced total fruit yield in 1988.
Effects of Gibberellic acid and 2,4-Dichlorophenoxy Acetic Acid Spray on Vegetative Growth, Fruit Anatomy and Seed Setting of Tomato (Lycopersicon esculentum Mill.) · 2013
- no effect
  GA3 treatment did not retard growth or cause flower bud abscission in tomato.
cites 2 papers here
Spatiotemporal localization of jasmonate in the regulation of fruit set in tomato · 2025
- negative
  GA biosynthesis inhibition suppressed Sldad1 fruit set.

A paper is on the positive side when any of its claims here is positive. Claims are grouped by organism, treatment and what was measured or targeted. Claims that compare genotypes are left out; a claim about lacking a nutrient counts the other way round in that nutrient’s question. “Results differ” marks a question where two model reviewers, reading both claims, accepted at least one pair of papers whose results differ.

Gibberellic acid · Yield · Solanum lycopersicum (tomato)

Papers whose results differ, checked claim by claim 24

How these papers cite each other

Papers reporting a positive result 51

Papers reporting a negative result or no effect 5

Gibberellic acid on Solanum lycopersicum (tomato) against other targets

Gibberellic acid · yield on other organisms