Method for controlling red spiders of apple trees

Abstract

The invention provides a method for controlling red spiders of apple trees. The method comprises the following steps: from March to April, after orchard cleaning in spring, when seedlings of grass emerge, dicofol with the mass fraction of 20% is diluted by 1,000 times with water, the diluent is used for spraying to kill the red spiders coming out of hibernation on the ground and foraging on grass twice, and the time interval of the twice spray-killing is 4-6 days; from the last ten days of May to the first ten days of June, after spring shoots of the apple trees stop growing, dicofol and avermectin pyridaben of which the mass fractions are both 20% are diluted by 1,000 times with water and prepared at the volume ratio of 1:1 to spray-skill larvae, nymphs, adults and eggs of red spiders on leaves of the apple trees twice, and the time interval of the twice spray-killing is 4-6 days. The method is simple and feasible, and achieves the purposes of cost decreasing and effectiveness increasing. Compared with a conventional method, the method provided by the invention has the advantages that the labor amount is reduced by 60%, the chemical cost is reduced by 50-60%, nearly 100% of red spiders are killed, the apple trees can be free from red spider harm in the whole year, and overwintering eggs of the red spiders from the last ten days of August to the first ten days of September are prevented.

Description

technical field [0001] The invention relates to the technical field of fruit tree planting, in particular to a method for preventing and treating red spider mites in apple trees. Background technique [0002] Red spider mite is a kind of mite, which specially harms the leaves of fruit trees, making the leaves of fruit trees unable to carry out photosynthesis, thus affecting the quality of fruits. Apple spider mites, also known as apple spider mites, mainly damage leaves. When the damage is severe, pale or scorched patches will appear on the leaves, which is extremely harmful. For this kind of pest, take more integrated control measures. Red spider mites overwinter mainly as eggs or fertilized female adults in the cracks of plant branches, and damage leaf buds after spreading leaves. Most of them like hot and dry environments, and the damage is most prevalent in June-August. To prevent and control spider mite, we must pay attention to its living habits, pay attention to the...

AI Technical Summary

Problems solved by technology

Lack of consideration of the growth and metabolism habits and timeliness of red spider mite in apple trees, frequent use of drugs and still causing adult insects to slip through the net, resulting in increased manpower and material resources, low control effect, and reduced economic income of apples