Proline foliar application, especially 200 mg.L -1, gave the highest cluster weight, number and yield.

proline · yield · VitisResults agree

2 papers in the same direction as this claim

1. positive
   Proline at 500 mg/L with shoot-topping enhanced yield per vine and bunch weight of grapevine.

   Improving Yield and Bunch Quality of ‘Crimson Seedless’ Grapevines Through the Use of Some Elicitors and Shoot-Topping Under Semi-Arid Conditions · 2025 · compared with control

   Same direction

2. positive
   GA3 plus proline gave the highest yield, cluster weight and berry size.

   Implication of Proline, Phenylalanine and Abscisic Acid on Growth, Yield and Berry Quality of “Thompson Seedless” Grapevines Treated with Gibberellic Acid. · 2025

   Same direction

application · yield · VitisPositive and negative results

79 papers in the same direction as this claim · 6 in the opposite direction · 1 reporting no difference from an alternative

1. positive
   Foliar ZnSO and borax combination increased grape yield relative to other treatments.

   Effect of micronutrients (Zinc and boron ) on growth and yield of grapes (Vitis vinifera L.) cv. Muscat · 2001 · compared with others

   Same directionCited by this paper

2. no effect
   Foliar P sprays did not affect yield at either site.

   Foliar Sprays Containing Phosphorus (P) Have Minimal Impact on ‘Pinot noir’ Growth and P Status, Mycorrhizal Colonization, and Fruit Quality · 2010

   Opposite direction

3. negative
   Acute acid rain sprays at anthesis (pH 2.75) reduced pollen germination in grapevine cultivars.

   Effects of Acid Rain on Grapevines · 1983

   Opposite direction

4. negative
   Pyrimethanil spraying at 5% cap fall significantly reduced seeds per berry.

   Pollination of Vitis vinifera L. cv. Pinot noir as influenced by Botrytis fungicides · 2015

   Opposite direction

5. no effect
   Hydrated lime had no negative effects on budbreak or yield of any grape cultivar.

   Application of Hydrated Lime to Hydrogen Cyanamide-treated Grapevines Reduces Lemon Leaf Abscission in Neighboring Lemon Orchards · 2006

   Opposite direction

6. no effect
   Local GА3 spraying had no negative yield aftereffect after three years.

   Последействие применения гиббереллина на столовых сортах винограда · 2021

   Opposite direction

7. no effect
   In 2023 the mixture gave no improvement in yield under heavy rains.

   Foliar Applications of Calcium, Magnesium, and Seaweed Mixture to Mitigate Chronic and Apoplectic Forms of Esca Disease and Improve Yield in Vineyards · 2026

   Opposite direction

8. no effect
   Dipping or spraying clusters with 0.3 mM GA3 showed no difference in seedlessness, berries per cluster or seeds per berry in 'Swenson Red' grape.

   Gibberellic Acid-induced Seedlessness in Field-grown Vines of `Swenson Red' Grape · 1991 · compared with dipped or sprayed with 0.3 m m GA 3

   No difference from an alternative

78 papers more in this group