In summer, heavy rain will cause many effects on the growth of fruit trees, such as the appearance of yellow leaves, rotted roots, poor flower bud differentiation, and rapid infestation of pathogens. There are the following management measures for possible problems.

Yellow leaf rain in fruit trees can provide sufficient moisture for the growth of fruit trees, but it often results in excessive supply of major nutrient elements and insufficient supply of some directly related elements, resulting in different degrees of yellowing of the leaves. Therefore, after the rain should pay attention to the combination of underground topdressing and foliar spraying, with particular attention to the application of iron and boron, magnesium, zinc and other trace elements, and at the same time can be applied to over-prosperous trees paclobutrazol 150 times or PBO250 times, control of Wang long.

The low topography of the individual trees in the roots of the fruit trees caused short-term accumulation of water. The roots of the fruit trees were anaerobicly respired, resulting in the roots of some roots that affected the nutrient supply, resulting in the rapid wilting of the leaves in the short term and the appearance of root rot. Mushi Lime 100 kg can be turned over, combined with fertilizer plus love more than 300 ~ 500 times liquid sterilization, suitable for summer ground pruning to promote air and light.

Poorly differentiated flower buds In the late growth period of fruit trees, heavy rain will make most of the fruit trees prosperous, affecting the transformation from vegetative growth to reproductive growth, resulting in nutritive competition between flower bud differentiation nutrition and fruit trees, resulting in poor flower bud differentiation and affecting the annual output. To trim through the summer, remove excessive back branches or pull branches to adjust the tree vigor and coordinate the nutrient supply. Spraying foliar fertilizers such as potassium dihydrogen phosphate and growth inhibitors were also used to promote flower bud differentiation.

The high-humidity environment where the bacteria infested and rained provided the germination conditions for germs. Rainwater is also the main transmission route for pathogens. If management measures cannot keep up, it is very easy to cause major diseases of fruit trees in the garden. Therefore, after the rain, it should focus on rot. Diseases, dry rot, ring rotten fruit disease, and prevention of early defoliation can be selected with 800 times solution of bactericidal superiority and 600 times solution of collaterals for spraying in sunny days after rain. Spraying with penetrating agent at the same time will have better effect.

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