The "infusion method" is often used to prevent fruit tree pests. Use systemic insecticides, use syringes or pipettes to inject the liquid into the phloem inside the bark, and spread the liquid through the tree to control the pests of some sucking mouthparts. This method has high control effect, simple application and long-lasting drug efficacy. It is not limited by the terrain, tree height and climatic conditions. It has little influence on natural enemies and is not affected by water sources. The specific measures are as follows: Select pesticides use pesticides with strong absorption.
Current systemic insecticides with good insecticidal effects include: 40% omethoate, 40% dimethoate, 25% insecticide, 25% insecticide, and water repellent.
The injection period starts from the sap of the spring fruit tree until the autumn fruit tree enters into the dormancy period. The best period is from April to August.
The amount of injection depends on the size of the tree. Tree 2.5 meters tall, 2.3 meters in diameter, and 9-13 cm thick, 1.5-2.5 ml of the original solution for injection; 1-1.5 ml for young trees; adult trees may be increased in an appropriate amount, preferably 3-5 ml. .
The injection method is to drill the tree trunk 20 centimeters from the ground, tilt down about 45 degrees, around the play 3-5 holes, then use the dropper or syringe to slowly inject the liquid.
Insect control effect 3-4 days after injection, the pests died, and all died within 6-7 days. Punching wounds can heal in two months or so.
Precautions Attention should be paid to the safety of humans and animals. In the summer high temperature season, the original solution should be diluted 3-6 times and injected in divided doses; omethoate is more toxic to bees and should not be used during the flowering period; 40 days before fruit harvest, no pesticide is needed to prevent contamination of fruits.
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