Apple Disease and Pest Control Techniques and Methods
The editor provides everyone with knowledge about green plants and flowers related to apple disease and pest control techniques and methods, as follows:
Apple Disease and Pest Control Techniques and Methods
If apple trees have ring rot, they can be controlled with Triadimefon·Ethiozinyl emulsion. For轮斑病 (ring spot disease), Methylthiophanate and Mancozeb can be used. For round spot disease,喷洒 (spray) Cytosine nucleoside antibiotics and Carbendazim, and if there is a small leaf roller, in early spring, scrape off the old bark and loose bark from the trunk and main lateral branches, then dip in Dichlorvos, paint the pruning cuts, and apply lime to the trunk.
Common Diseases in Apple Planting
1. Ring rot: Ring rot commonly occurs in apple planting, with deep red spots appearing near the lenticels of branches. Severe cases can cause bark cracking and rough bark. It rarely appears in young fruit and mainly occurs after fruit maturity, leading to rot.
2. Ring spot disease: This disease harms leaf growth and also infects fruit. Black spots appear on the leaf edges, which then expand, with the center of the lesions being round or near-round with distinct ring patterns. In high temperature and humidity, black mold-like substances grow on the back of the lesions, and infected fruit softens and rots.
3. Round spot disease: This disease mainly harms leaf growth but also infects petioles, shoots, and fruit. Leaves develop clearly defined round spots with dense small black dots in the center. Infected fruit will show slightly protruding radial dirty spots with black dots.
Main Pests in Apple Cultivation
1. Small leaf roller: Larvae harm the growth of buds, leaves, flowers, and fruit of apple trees, causing leaf curling, followed by webbing and drying of leaves, leaving irregular small pits on the fruit.
2. Fruit borer: Fruit borers mainly enter from the head and tail of the fruit. Two days later, fruit胶 (fruit gum) drips from the entry hole and then dries, with white waxy substances visible.
Apple Disease and Pest Control Techniques and Management Methods
For ring rot, Triadimefon·Ethiozinyl emulsion, Methylthiophanate·Mancozeb, Isoprothiolane·Carbendazim, Tebuconazole, and Picoxystrobin·Flusilazole can be used. For ring spot disease, Methylthiophanate, Mancozeb, Polyoxysorbate, Ethiozinyl, and Basic Copper Sulfate can be used.
For round spot disease, spray Cytosine nucleoside antibiotics, Carbendazim, Propineb, and 1:2:200 Bordeaux mixture. If there is a small leaf roller, in early spring, scrape off the old bark and loose bark from the trunk and main lateral branches, use an old cloth wrapped into a cotton ball tied to a 1.5-meter-long stick, then dip in Dichlorvos, paint the pruning cuts, and apply lime to the trunk to effectively kill fruit borers.
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