In the summer, the rainy weather will increase and the rainfall will be heavier. Rainfall will also bring bad effects on the medication of fruit trees. So, what are the effects of rainy weather on the orchard?
1. It is easy to cause early occurrence of early leaf falling disease
The occurrence of disease is closely related to air humidity. For example, brown spot disease, generally in late May, when the temperature exceeds 24°C and the humidity in the orchard reaches above 80%, it will quickly infect and cause leaf fall in June.
2. Easy to cause coal pollution
The period from now to mid-to-late May is the period when fruit growers are bagging. Rain caused high humidity in the orchard. The fog condenses on the fruit surface and the fruit enters the bag with dew. This promotes the propagation of pathogens in the bag, and the proportion of coal-stained and diseased fruit is high.
The principle is the same as that of not bagging immediately after spraying. You must wait for the fruit noodles to dry and then bagging is the same. In addition, bagging with dew on the fruit surface will aggravate the occurrence of bagged apple black spots.
Third, the tree is not easy to stop growing
In late May, the spring shoots of fruit trees should stop growing, and the usual measures are to properly control water. The continuous rain is equivalent to watering the orchard, which will cause the new shoots to grow continuously when they should stop growing, affect the degree of lignification of the branches and delay the process of flower bud differentiation.
Regarding tree control, the focus is on fertilizer and water regulation. It is very important to supplement fertilizers in late May and early June. One is to promote the expansion of young fruit, and the other is to promote the differentiation of flower buds in the next year, but also to control water. Therefore, the fertilizer should be low-nitrogen, which can add organic matter and microorganisms for better effect.
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