How to prevent and control rape seed shrinkage and empty grain disease? A detailed explanation of prevention and control methods
Prevention and control methods for rape seed shrinkage and empty grain disease
(Agricultural Wealth Network) Boron deficiency is caused by multiple factors. In addition to increasing boron fertilizer application, the content of available boron in the soil should also be increased. Spraying boron in the seedbed. 1 to 2 days before transplanting, use 50 liters of 0.4% borax solution per mu of seedbed for foliar spraying. According to the degree of soil boron deficiency, apply once at the seedling stage or once each at the seedling and bolting stages, using 50 grams of borax mixed with 50 liters of water per mu each time for foliar spraying. After flowering, if there is a phenomenon of flowers but no seed set, 50 grams of borax can be used per mu, added to 50 liters of water, and sprayed outside the roots for control. Before transplanting rape, applying 10 kg of boron calcium magnesium phosphate fertilizer per mu also has a good effect.