Mepiquat chloride is used in watermelon and melon cultivation primarily to inhibit excessive vine growth and optimize plant architecture, thereby indirectly promoting fruit development.
Key functions of Mepiquat chloride on melon crops:
Controlling excessive growth:By inhibiting gibberellin activity, it shortens internodes and creates a compact plant structure, preventing excessive vine elongation and reducing the wasteful consumption of nutrients.
Promoting reproductive growth: It directs more nutrients toward flowers and fruit, increasing fruit set rates and facilitating uniform fruit development.
Enhancing stress resistance: It promotes leaf thickening and increases chlorophyll content, thereby boosting photosynthetic efficiency and indirectly improving fruit quality.
Usage recommendations and precautions for Mepiquat chloride:
Timing of application:It is recommended to spray Mepiquat chloride once during the early flowering stage and again during the early fruit-setting stage; avoid excessive use during the period of rapid fruit expansion to prevent inhibiting fruit development.
Concentration control:A common practice is to dilute 25% Mepiquat chloride aqueous solution to a 2,500-fold dilution for foliar spraying; excessive application may result in undersized leaves, overly dense internodes, or even fruit drop.
