Apple Tree Disease and Pest Control Techniques and Methods
Comprehensive explanation of apple tree disease and pest control techniques and methods in the aspect of green plants and flowers, the specific content is as follows:
Apple Tree Disease and Pest Control Techniques and Methods
If apple trees have轮纹病 (ring rot), it is necessary to spray pesticides early, such as Triadimefon·Ethylthiozinol Emulsion, Tebuconazole. For轮斑病 (ring spot disease), you can spray Methyl Thiophanate, Mancozeb. For圆斑病 (round spot disease), you can use Pyrimidine Nucleoside Antibiotics, Carbendazim. In early spring, scrape off the old, loose, and cracked bark from the tree trunks to prevent the occurrence of苹小卷叶蛾 (small卷叶蛾 moth). If there are fruit worms, you can spray 20% Cypermethrin Emulsion 2000-4000 times dilution.
Common Diseases in Apple Tree Cultivation
1. Ring rot: It is a common disease during apple tree cultivation, usually concentrated in the rainy season. Deep red lesions appear around the lenticels of branches. In severe cases, the bark cracks and becomes rough.
2. Ring spot disease: It mainly affects leaves and also infects fruits. The edges of leaves are the first to get infected, with the initial spots being brown to black small spots, which then gradually expand.
3. Round spot disease: It mainly affects leaves and also invades petioles, branches, and fruits. Initially, infected leaves show yellow-green round spots with distinct boundaries, and a small black dot in the center, resembling a chicken eye.
Main Pests in Apple Tree Cultivation
1. Small卷叶蛾 Moth: Larvae affect the growth of buds, leaves, flowers, and fruits. They often roll the edges of tender leaves, then spin silk to connect the leaves, with larger larvae absorbing the sap from the leaves, causing numerous holes and irregular small pits on the fruits.
2. Fruit worm: Larvae usually enter the apple from the base or top of the fruit stem. Two days later, fruit gum droplets are secreted, which soon dry up, leaving white waxy substances visible at the holes.
Apple Tree Disease and Pest Control
1. Diseases: If apple trees have ring rot, it is necessary to spray pesticides early, such as Triadimefon·Ethylthiozinol Emulsion, Tebuconazole, Oxycarboxin·Flusilazole, etc. For ring spot disease, you can spray Methyl Thiophanate, Mancozeb, Polyoxin, Ethylthiozinol, Basic Copper Sulfate, etc. For round spot disease, you can spray Pyrimidine Nucleoside Antibiotics, Carbendazim, Propiconazole.
2. Pests: In early spring, scrape off the old, loose, and cracked bark from the tree trunks. Then, wrap cotton into a ball, tie it to a stick, dip it in敌百虫 (Dichlorvos), and brush the cut and sawed areas to kill overwintering larvae. If fruit worms appear, you can spray 20% Cypermethrin Emulsion 2000-4000 times dilution, or 10% Cypermethrin Emulsion 2000 times dilution.
The above is a detailed introduction to apple tree disease and pest control techniques and methods. Do you understand now?