What are the control methods for boll shedding in cotton?
The reasons for the high or low emergence rate of cotton are, generally speaking, manifold: they include the effect of the weather during the previous year's cotton harvest season on the maturity of the cotton, as well as whether the cotton seedling-raising techniques were properly matched. As for the climatic conditions of the previous year, the weather during the cotton harvesting period was, on the whole, fairly good, which was favorable for the maturation of cotton seeds...
1. For poor, thin cotton fields or those showing premature aging due to fertilizer depletion in the late growth stage, foliar topdressing should be carried out.2. For fertile cotton fields or cotton showing excessive vegetative growth, control can be achieved by regulating fertilizer and water, intertillage, pruning and topping, and spraying hormones. The specific use of hormone spraying is: at the flowering and boll stage, use a mixture of 40% gibberellin soluble granules at 60000-fold dilution and 50% chlormequat aqueous solution at 30000-fold dilution, spraying once every 7 days for 3-5 consecutive sprays, with about 50 kg of spray solution per mu each time.
3. Pay attention to timely drought prevention and drainage of waterlogged fields.