This is the general name for the larvae of chafers. The main threats to peanuts include the North China Black Turtle, the Green Turtle, and the Dark Turtle. "Northern China Black" occurred in the neighboring Shandong Province in 2 years. Adults or larvae overwintered. The adults started in early April and prospered in the middle and early May. The "green" and "dark" generations occurred one year later, and the larvae passed winter. Adults originated in early June and prospered in late June. The main bite of peanut roots, fruit acupuncture, young fruit, nuts, etc., caused by early lack of seedlings off peanut ridge, late serious fruits can eat all the peanuts, old fruit bite into an empty shell, generally 20% ~ ~ 30%, serious particles are missing.

In recent years, there has been an increase in the occurrence of hazards, and it has become increasingly difficult to prevent and control. This has threatened the high yield and quality of peanuts, and caused significant losses in production. At the same time, with the improvement of the understanding of agricultural product quality and safety, the prohibition of the use of high-toxicity and high-residue pesticides, combined with long-lasting period of peanut aphid, short-term efficacy of conventional pesticides, good early control effect, and loss of pesticides due to drug degradation in the middle and later stages. Insect effect, resulting in peanuts still heavy. In order to achieve the long-term control of peanut meal, it is an effective measure to promote the use of microcapsule suspension pesticides instead of conventional pesticides. The microcapsule suspension insecticides with good effect on peanut meal in current production are chlorpyrifos microcapsule suspension (race hawks) and the like. It has the characteristics of long effective period, simple application, low residual safety, and high efficiency. The drug efficacy period is as long as 120 days, once peanuts are used for medicine, and there is no underground pest in one season. It can control fleas effectively in the whole growth period, and the control effect is more than 90%. It can also kill a variety of underground pests, and mu can increase production by more than 10%. Its use techniques and methods are as follows:

The spraying methods when sowing are: First, the water spray hole method: 400 ~ 500 grams of mu medication, 50 kg of water, directly sprayed on the seed after sowing, cover immediately after spraying cover seed; second is mixed sand cover species Method: 400-500 grams of mu medication and 30-40 kg of dry sand are mixed well, and the poisonous sand is covered on the sown peanut seeds, and the cover is immediately covered with soil. The above two methods are applicable to plots with on-spot seeding or trenching sowing. For mechanical sowing, 400 grams per 15 kilograms of peanut seeds can be used for spreading after fully mixing and drying.

Post-emergence use of irrigation pier method: 400 to 500 grams of medication with 150 kilograms of water on peanuts after emergence of membrane rupture until flowering, evenly poured in the peanut roots.

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