In some places, beetles are also known as vegetable dumplings, soil flea, etc., which endanger the crops widely and cause harm to radish, cabbage, rapeseed, mustard, and tomato fruits, melons, beans, bananas, etc. Years have seen aggravating trends in some areas.
The beetle is mainly based on the leaves of adult plants that are harmful to the plants. Adults tend to feed on their tender tendencies. Therefore, the seedlings are seriously endangered. Especially when the seedlings are newly emerged, they cannot grow after being damaged, which often results in the destruction of the species.
Spring, summer and winter are the two most serious peaks of the beetle beetle. As the beetle bugs can fly, it is difficult to control. According to their life rules and hazard characteristics, prevention and control should be carried out according to the following four principles.
The prevention and control of beetles in a timely manner is the most serious in April-May (first generation). 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 7-8 am or 5-6 pm, when the adult is unearthed, its activity is poor and its efficacy is good. In winter, beetles are active at around 10 o'clock in the morning and 3-4 o'clock in the afternoon. Frightened and fled around, but at noon 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, the outer and inner jump beetles have a strong jump. When spraying from the inside out, the beetle is easy to run away. Therefore, 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.
Up and down the fight against beetle control only consider the spray on the ground, often less effective. 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 use of drugs can control many of the beetle beetles, but single-use drugs are prone to drug resistance, affecting the control effect. When it was found that the larvae began to harm the roots of the vegetables, the roots were fed with 90% crystal trichlorfon or 50% phoxim EC 1000-1500 times, and each potion 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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