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The high incidence of Spodoptera litura is related to the continuous high temperature of the city, and according to the analysis, the Plant Protection Station predicts that the moth will enter the main damage period in late July of this year and the damage time will be long.
Because Spodoptera litura has fulminant, sudden, omnivorous, and drug-resistance characteristics, it is difficult to control. Experts suggest that prevention and control can be based on adult habits, the use of insecticidal lamps, sexual attractants and other measures to kill adults, reduce the amount of eggs in the field, and immediately remove egg masses and larval cluster leaves. The agent can be sprayed with 15% suspension solution 3000 times solution, Aolu No. 2000 solution, 10% demineralization solution 1500 times, etc. for spray control.
However, it should be noted that according to the larvae's habits, the time for medication should be carried out in the evening, and high-efficiency, low-toxic, low-residue pesticides should be used. Pesticides are recommended to be used alternately and reasonably to delay the development of pest resistance.
There is a kind of pest that often harms crops such as beans, alfalfa, and lotus roots. In severe cases, the leaves are eaten into a net shape, and the fruit is drilled, which seriously affects the quality and yield of vegetables. This pest is called Spodoptera litura. According to a survey conducted by the plant protection station in Hangzhou, it was found that moth peaks occurred on July 6 and July 9, and the number of moths was higher than in the same period in recent years.