Bunting beetles are mainly dominated by the leaves of adult-damaged plants, with many small perforations or only transparent epidermis formed on the victim's leaf. Adults tend to have tender foods, so the seedlings are seriously endangered. In particular, freshly emerged seedlings cannot grow after being damaged, often causing destruction of the seedlings.
Spring, summer and winter are the two most serious peaks of the beetle beetle. The climate is suitable in spring and summer, and there are many kinds of vegetables. In winter, the temperature and humidity in the greenhouse are suitable, which is conducive to the reproduction of the beetle. Therefore, there are constant hazards in spring, summer and winter, which cause difficulties in prevention and control.
Timely prevention. The beetle bug is the most severe from April to May (first generation) in one year. According to the law of adult activity, targeted spraying is adopted. During the season when the temperature is high, most of the adult nocturnal insects sneak back into the soil. Generally, spraying is more difficult to kill. Can be sprayed at 7 to 8 o'clock in the morning or 5 to 6 o'clock in the afternoon (especially in the afternoon). At this time, the activeness of the adults is poor and their efficacy is good. In the winter, the beetle beetles are around 10 o'clock in the morning and 3 o'clock in the afternoon. At 4 o'clock, it was particularly active, easily disturbed and fleeing around, but at noon it was often quiet at the bottom of the leaf. Therefore, in the morning, when the adult is freshly excavated in the morning, or when the adult activities in the noon and afternoon are in a state of “fatigueâ€, the medicine is sprayed.
First outside and then inside. Bounce beetles have a strong leaping ability, spraying medicine from the inside out, the beetle is easy to escape, so when spraying, care should be taken to spray from the side of the field to prevent the adults with strong jumping ability from escaping. If the plots are wider, they should be sprayed around and enclose pests; if the plots are long and narrow, they can be sprayed at one end and then sprayed from the other end so as to “surveillance and intercept†to prevent the adults from fleeing. Spraying should be light and do not disturb adults.
Upper and lower governance. Prevention of beetle control only consider spraying on the ground, and the effect is often poor. Bounce beetles not only harm the crop leaves, but also harm the roots of the crops. It should be taken together with the same treatment, physical control and chemical prevention combined. First, after harvesting the crops, the stubble leaves are completely collected, the weeds are burned, and the soil is sunk deep before sowing so as to eliminate some of the galls and improve the wintering environment of the insects. In addition, lay the mulch to prevent adults from laying their eggs on the roots. In heavy-hazardous areas, before or after planting, use poisonous soil or leaching solution to treat the soil and kill the insects.
Alternate medication. There are many medicines that can prevent and control beetle beetles, but single-use medicines are susceptible to drug resistance and affect the control effect. When it was found that the larvae were beginning to harm the roots of vegetables, they were fed with 1000-1500 times of 50% phoxim EC solution one by one. Each irrigating solution was 100-200 ml. When there is a hazard in the field, acetamiprid, bupropion and pyrethroid insecticides can be sprayed. They can be mixed and used interchangeably, but do not use a single drug.
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