A control method for citrus huanglongbing of fruit-bearing citrus trees

Abstract

The invention belongs to the technical field of plant disease and insect pest control, and particularly discloses a method for preventing the citrus tristeza virus. The method is especially suitable for preventing the citrus tristeza virus of fruit bearing production type citrus trees. According to the method, through special management of spring shoots, summer shoots, early and late autumn shoots and winter shoots of the citrus trees every year, the food sources and breeding sites of citrus psylla spreading the citrus tristeza virus can be effectively eliminated so that eggs and nymphs can not grow and develop normally, the number of subcultured pest sources is reduced greatly, and then an ideal preventing effect is realized; meanwhile, the usage amount of insecticides can be reduced, natural enemy protection is achieved, and prevention cost is reduced; furthermore, compared with the shoot control scheme, the method has the advantages that the growth of the citrus trees is not affected, and the effect of eliminating the food sources and breeding sites of citrus psylla spreading the citrus tristeza virus is remarkable.

Description

technical field [0001] The invention relates to the technical field of prevention and control of plant diseases and insect pests, in particular to a method for preventing and treating citrus huanglongbing, and more specifically, to a method for preventing and controlling citrus huanglongbing of fruit-bearing production citrus trees. Background technique [0002] Citrus huanglongbing, also known as yellow shoot disease, has become one of the key factors restricting the healthy development of citrus industry. Citrus huanglongbing is a systemic disease. There is no way to cure the disease after infection, only to dig out the whole plant, so it is commonly known as "cancer" on citrus. The citrus psyllid is the only vector insect that transmits citrus Huanglongbing. The pathogen of Huanglongbing can reproduce in the psyllid. Both the adults and the 3rd to 5th instar nymphs of the psyllid can transmit the disease. When the infected psyllid feeds on healthy plants, the pathogen pas...

AI Technical Summary

Problems solved by technology

Therefore, although the existing chemical control can effectively control the adults of citrus psyllids, they cannot effectively kill eggs and young nymphs, leaving a large number of insect sources for the subsequent generation of citrus psyllids.

At the same time, the extensive use of broad-spectrum insecticides not only poisons the citrus psyllid but also kills its natural enemies, and the lack of natural enemies makes the control of citrus psyllid more difficult and increases the cost of control.

The second method is to cut down the whole plant of the diseased fruit trees in the orchards with severe citrus greening disease or abandoned ones, and then spray pesticides on a large scale around the orchards to control citrus psyllids, and plant new fruit seedlings after a period of time, but this method It is not an effective control method at all, but giving up treatment will cause very large economic losses to fruit farmers

The third method of hanging sticky boards, this method controls adults, because the amount of adults that can stick to them is very small, so the control effect is very poor

The fourth is the application of natural enemy control method. This method uses natural enemies such as ladybugs, lacewings, hoverflies, praying mantises, bright-bellied wasps or Ali-eating wasps. These methods are still in the research and development stage, and it is very difficult to raise a large number of natural enemies. It is also difficult to use in large areas in production

At present, because the above four methods cannot completely control the population of citrus psyllids, the existence of a large number of citrus psyllids in the orchard has caused the rapid spread of citrus greening disease

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