The citrus whitefly is a common citrus pest that mainly damages the leaves and fruits of citrus trees. It often leads to the weakening and death of the tree, and its harmful symptoms and prevention methods are as follows:
1.Leaf damage: Citrus whiteflies gather on the back of leaves as adults and nymphs, sting and sucking sap, causing the leaves to curl, yellow, and fall off. In severe cases, the entire canopy of the tree is yellowed, and even causes the tree to weaken and die.
2.Fruit damage: The nymphs and adults of citrus whiteflies can also suck the juice of the fruit, resulting in poor fruit development, rough skin, black spots or spots, and reduced fruit quality and yield.
1.To control citrus whitefly, it is necessary to strengthen garden management, prune diseased branches and dead branches in time, enhance the ventilation and light transmission of the canopy, reduce humidity, and reduce the breeding environment of whitefly. At the same time, reasonable fertilization can enhance the tree potential and improve the insect resistance of the tree.
2.Control of citrus whitefly, protection and use of natural enemy insects, such as parasitic wasps, ladybugs, etc., to control the population of citrus whitefly. Placing nests in the garden attracts birds and increases the number of predators.
3.Pesticide control of citrus whitefly, spraying pesticides during the nymph blooming period. Commonly used agents are imidacloprid, thiazinone, bifenthrin, etc. When spraying, care should be taken to spray evenly, especially on the back of the leaves and the hidden parts of the fruit.
4.The control of citrus whitefly is indispensable for field management. Turn the soil deep in winter to kill whiteflies that overwinter in the soil;After pruning diseased branches and dead branches in spring, clean up the dead branches and fallen leaves in the garden in time, and burn them or bury them deep to reduce the source of overwintering insects. The use of fruit arhat + sodium nitrate naphthalene acetic acid can promote the absorption of nutrients in citrus and enhance disease resistance.
In short, comprehensive measures should be taken for the control of citrus whitefly, and the combination of inter-garden management, biological control, chemical control and agricultural control should be strengthened to improve the control effect.