Cloruro de mepiquat has the effect of systemic absorption and conduction, promotes the absorption of roots, stems and leaves, promotes the synthesis of chlorophyll in crops, makes the plant type compact, which is beneficial to enhance photosynthesis; reduce the consumption of ineffective nutrients; enhance the activity of crop roots , so that the root is developed, and the crop stress resistance, drought resistance and water logging resistance ability are improved; reasonable adjustment, distributing the contradiction between vegetative growth and reproductive growth, promoting reproductive growth, reducing flower and fruit shedding, and improving fruit quality , increase production.