Control methods for locust locusts

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Because the population of locust plague has a characteristic of rising steeply and descending from fruit development to post-harvest; larvae hatch from the bottom of the eggshell and continue to live in the nucleus directly from the bottom of the eggshell until it matures. It does not turn fruit and is hard to touch. Difficulties, so the focus on prevention and control in the fruit period, chemical prevention and control focus on the adult before the spawning. After fruit harvesting, population fertility declines, natural enemies have a high natural control effect, and generally it is not appropriate to use chemical control to reduce environmental pollution, avoid killing or injuring the natural enemies of orchards, and trigger the occurrence of other minor pests. Specific measures: 1. Physical control bagging method. In recent years, the use of non-woven bags on the cultivation of fruit seeds, such as Zixiaoxiao, Marchhong, and Blackleaf, has improved the quality and effectiveness of the coloring of the fruit husks. It can be combined with the prevention and control of pests to reduce the source of spring bugs, specifically in the second physiology. After dropping the fruit, the sprayed locust-proof pedestal and the anti-P. armandi pesticide were bagged again to protect the fruit and reduce the spread of insects. However, it does not apply to glutinous rice varieties and will increase acidity and cracking fruit. 2. Agricultural techniques timely attack autumn shoots and control winter shoots, and short-planted early-maturing varieties such as March Red, Gardenia Laugh, Black Leaves, etc., can reduce overwintering insect sources. 3. Chemical control using high efficiency and low toxicity of chitin synthesis inhibitor diflubenzuron 1000 ~ 2000 times liquid, or mixed heterologous plant secondary biomass, immortal oil, ethanol extract of loquat leaves have a evasive effect on spawning; Pesticide BT (Bacillus thuringiensis) guides the dilution concentration according to the bacterial content of the manufactured product. 25% of insecticidal doubles and 500 times of mixed 90% crystal trichlorfon 800 times, according to the forecast and forecast, in the early afternoon before the oviposition period of the adult eclosion stage, the key spraying nozzle and its nearby branches and leaves have good fruit preservation effect, and have an impact on natural enemies. Very small, it is also small for humans, animals, and parasitic natural enemies. The pyrethroids and highly toxic organophosphorus pesticides have a high insecticidal effect but they are harmful to natural enemies and should not be used.

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