Method for controlling early leaf fall of pear tree

Abstract

The invention discloses a method for controlling the early leaf fall of a pear tree. The method comprises the step of spraying a leaf fertilizer consisting of chlormequat chloride, urea, plant ash or monopotassium phosphate and calcium disodium edetate dehydrate on leaves on the basis of the existing chemical control once on the third day, 15th day and 30th day after harvesting fruits. According to the method, in accordance with the basic theory of the phytophysiology and the plant nutrition, the chlormequat chloride and a nitrogen, potassium and calcium compound fertilizer are dressed on the leaves of the pear tree while the chemical control is carried out, and thus the leaf nutrition is increased, the leaf senescence and falling are delayed; and through three-year continuous tests, the control rate of the early leaf falling of the pear tree is increased to 65-80 percent.

Description

technical field [0001] The invention relates to a method for preventing and treating early defoliation of pears, and belongs to the field of fruit cultivation. Background technique [0002] Pathological and physiological abnormalities such as early leaf defoliation of plants (fruit trees) caused by factors such as global warming have gradually attracted the attention of relevant scholars. Early leaf defoliation of pears refers to the phenomenon of a large number of leaves falling off before mid-to-early October under the southern climate conditions, which will affect the nutrient accumulation of the tree at the slightest level, resulting in weak tree vigor, partial reduction in production and fruit quality in the next year, and at the worst, it will lead to a decrease in the quality of the fruit in the late autumn of that year. In the early winter, there are different degrees of greening and flowering phenomenon, and even no flowers to bloom and no fruits to bear in the foll...

AI Technical Summary

Problems solved by technology

The conventional method for fruit tree production is to use insecticides and fungicides (pharmaceutical control) before and after fruit picking to focus on the control of pear scab, pear anthracnose, pear brown spot, pear black spot, Chinese pear psyllid, etc., to reduce pests and diseases Damage to the leaves; according to years of statistics, the control effect of a single chemical control method on the early leaf fall of southern early-maturing pears is not good, and the control rate is only 15-30%