Abstract
Interference of redroot pigweed (Amaranthus retroflexus L.) and prostrate pigweed (Amaranthus blitoides L.) in transplanted tomato (Lycopersicon esculentum Mill ‘GS12’) was studied in two field experiments in 1990 and 1991. Final yield was unaffected when the naturally occurring Amaranthus spp (mostly A. blitoides) were allowed to interfere with tomato plants for 28 days after transplanting in 1990. Significant yield reduction occurred when the weeds (mostly A. retroflexus) infested for only the first 14 days after transplanting in 1991. Further delay in weed removal treatments drastically reduced growth and yield of tomato plants and lowered fruit quality. Tomato plants kept weed- free for longer than 14 days after transplanting in 1990 or just for the same period in 1991 significantly increased tomato yields compared with tomato plants weed infested for the whole season. Yield was not significantly changed for various weed-free periods longer than 28 days after transplanting in 1990 and 14 days in 1991. The critical period of weed interference based on average yield in the two years was between 28 and 35 days after transplanting. Weeds emerging earlier or later than this period had no significant effects on the final yield provided the weeds were absent at this time.
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Claims 8
Claim · model-written summary
Final tomato yield was unaffected when Amaranthus weeds interfered with transplanted tomato for 28 days after transplanting in 1990.
- Taxon
- tomato
Solanum lycopersicume0 - Material
- GS12e0
- Treatment
- allowed to interfere with tomato plants for 28 days after transplantinge1
- Interactor
- Amaranthus spp
_with_green_foliage%2C_photographed_in_Tamil_Nadu%2C_India.jpg?width=60)
Amaranthuse1weed - Outcome
- Final yielde1
- Direction
- unaffectede1
- Setting
- field experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_with_green_foliage%2C_photographed_in_Tamil_Nadu%2C_India.jpg?width=500)
Verbatim
e0“Interference of redroot pigweed (Amaranthus retroflexus L.) and prostrate pigweed (Amaranthus blitoides L.) in transplanted tomato (Lycopersicon esculentum Mill ‘GS12’) was studied in two field experiments in 1990 and 1991”
e1“Final yield was unaffected when the naturally occurring Amaranthus spp (mostly A. blitoides) were allowed to interfere with tomato plants for 28 days after transplanting in 1990”
Claim · model-written summary
Significant tomato yield reduction occurred when weeds infested transplanted tomato for only the first 14 days after transplanting in 1991.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- GS12e0
- Treatment
- infested for only the first 14 days after transplantinge2
- Interactor
- A. retroflexus
Amaranthus retroflexuse2weed - Outcome
- yielde2
- Direction
- reductione2
- Setting
- field experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interference of redroot pigweed (Amaranthus retroflexus L.) and prostrate pigweed (Amaranthus blitoides L.) in transplanted tomato (Lycopersicon esculentum Mill ‘GS12’) was studied in two field experiments in 1990 and 1991”
e2“Significant yield reduction occurred when the weeds (mostly A. retroflexus) infested for only the first 14 days after transplanting in 1991”
Claim · model-written summary
Further delay in weed removal drastically reduced growth and yield of tomato plants.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Further delay in weed removal treatmentse3
- Outcome
- growth and yielde3
- Direction
- reducede3
- Setting
- field experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interference of redroot pigweed (Amaranthus retroflexus L.) and prostrate pigweed (Amaranthus blitoides L.) in transplanted tomato (Lycopersicon esculentum Mill ‘GS12’) was studied in two field experiments in 1990 and 1991”
e3“Further delay in weed removal treatments drastically reduced growth and yield of tomato plants and lowered fruit quality”
Claim · model-written summary
Further delay in weed removal lowered tomato fruit quality.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Further delay in weed removal treatmentse3
- Outcome
- fruit qualitye3
- Direction
- lowerede3
- Setting
- field experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interference of redroot pigweed (Amaranthus retroflexus L.) and prostrate pigweed (Amaranthus blitoides L.) in transplanted tomato (Lycopersicon esculentum Mill ‘GS12’) was studied in two field experiments in 1990 and 1991”
e3“Further delay in weed removal treatments drastically reduced growth and yield of tomato plants and lowered fruit quality”
Claim · model-written summary
Keeping tomato weed-free for longer than 14 days after transplanting significantly increased tomato yield compared with full-season weed infestation.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- GS12e0
- Treatment
- kept weed- free for longer than 14 days after transplantinge4
- Outcome
- tomato yieldse4
- Direction
- increasede4
- Comparator
- weed infested for the whole seasone4
- Setting
- field experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interference of redroot pigweed (Amaranthus retroflexus L.) and prostrate pigweed (Amaranthus blitoides L.) in transplanted tomato (Lycopersicon esculentum Mill ‘GS12’) was studied in two field experiments in 1990 and 1991”
e4“Tomato plants kept weed- free for longer than 14 days after transplanting in 1990 or just for the same period in 1991 significantly increased tomato yields compared with tomato plants weed infested for the whole season”
Claim · model-written summary
Yield was not significantly changed for weed-free periods longer than 28 days after transplanting.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- various weed-free periods longer than 28 days after transplantinge5
- Outcome
- Yielde5
- Direction
- not significantly changede5
- Setting
- field experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interference of redroot pigweed (Amaranthus retroflexus L.) and prostrate pigweed (Amaranthus blitoides L.) in transplanted tomato (Lycopersicon esculentum Mill ‘GS12’) was studied in two field experiments in 1990 and 1991”
e5“Yield was not significantly changed for various weed-free periods longer than 28 days after transplanting in 1990 and 14 days in 1991”
Claim · model-written summary
The critical period of weed interference in tomato, based on average yield over two years, was between 28 and 35 days after transplanting.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- critical period of weed interferencee6
- Value
- between 28 and 35 days after transplantinge6
- Qualifier
- based on average yield in the two yearse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interference of redroot pigweed (Amaranthus retroflexus L.) and prostrate pigweed (Amaranthus blitoides L.) in transplanted tomato (Lycopersicon esculentum Mill ‘GS12’) was studied in two field experiments in 1990 and 1991”
e6“The critical period of weed interference based on average yield in the two years was between 28 and 35 days after transplanting”
Claim · model-written summary
Weeds emerging earlier or later than the critical period had no significant effect on final tomato yield when absent at the critical time.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- final yielde7
- Qualifier
- Weeds emerging earlier or later than this periode7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interference of redroot pigweed (Amaranthus retroflexus L.) and prostrate pigweed (Amaranthus blitoides L.) in transplanted tomato (Lycopersicon esculentum Mill ‘GS12’) was studied in two field experiments in 1990 and 1991”
e7“Weeds emerging earlier or later than this period had no significant effects on the final yield provided the weeds were absent at this time”
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See all 76 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.