What are the hazards of citrus psyllids to citrus? When do citrus psyllids generally occur? What drugs can be used to control citrus psyllids? The following is a brief introduction. First, the harm of citrus psyllids Citrus psyllids are vector insects that harm the new shoots of citrus. Adults suck sap and lay eggs on young shoots, and nymphs cluster on young shoots and young leaves, causing new shoots to bend and young leaves to deform. Nymph secretions can induce soot disease. Second, the occurrence of citrus psyllids in the number of generations in 1 year is related to the number of new shoots, and the length of each generation is related to the temperature. If the anniversary has young shoots, 11 to 14 generations can occur in 1 year. Yes
What are the hazards of citrus psyllids to citrus? When do citrus psyllids generally occur? What drugs can be used to control citrus psyllids? The following is a brief introduction.
First, the harm of citrus wood lice
Citrus psyllids are vector insects that harm new shoots in citrus. Adults suck sap and lay eggs on young shoots, and nymphs cluster on young shoots and young leaves, causing new shoots to bend and young leaves to deform. Nymph secretions can induce soot disease.
Second, the occurrence of citrus wood lice
The number of generations in 1 year of citrus psyllids is related to the number of new shoots, and the length of each generation is related to temperature. If the anniversary has young shoots, 11 to 14 generations can occur in 1 year. Adults lay eggs in the gaps of the buds after budding, no young shoots do not lay eggs, and the hatching nymphs suck up the sap of the young buds and develop and grow on them until they are 5 years old. Wood lice are mostly distributed on weak trees. In mid-Autumn Festival, huanglong disease occurs the most severely, followed by summer shoots, and yellow dragon disease will occur after the early summer shoots are killed in May. In late autumn, the wood lice will once again have a peak of harm.
Third, citrus lice control methods
1. Do a good job of clearing the garden in winter, and kill it by spraying, which can reduce the insect mouth in spring.
2. Strengthen management, especially fertilizer and water management, so that the trees are vigorous and the shoots are neat, so as to facilitate the unified spraying of drugs to prevent and control pyllids.
3. The best time for control is when the citrus tree germinates to the bud length of 5 cm.
The agents for the prevention and control of pyllids are: 40% Leguo 800 times liquid, 20% rapid killing butadiene emulsion 2000 ~ 3000 times liquid.
Source: Citrus Cultivation Pass