Adult control: 90% trichlorfon crystal, 800 times of 50% octanethiol emulsifiable concentrate, 1000 times of 40% poisonous silk or 800 times of 50% malathion emulsifiable concentrate are sprayed at the beginning of adult occurrence to the end of peak period, and 65438+ is sprayed every 10- 15 days.

Physical control: Using the phototaxis and chemotaxis of adults, we can trap and kill grub adults with black light and sex attractant. From mid-June to late July, it is the peak period of adult occurrence and the peak season of sweet potato growth. Black lights can be installed in sweet potato fields to trap and kill adults.

Agricultural control: mainly combined with farming measures to control grubs. Potato-wheat rotation is often practiced in northern potato areas. After harvesting wheat in early June, the soil can be turned deep and dried, and chickens can be slaughtered or raised to peck at larvae. In June+10/October, 5438, the summer potato was harvested deeply, which destroyed the living environment of grubs in the soil. Grubs are afraid of floods, and larvae can be eliminated by irrigation.

Biological control: Fungal preparations such as Beauveria bassiana and Metarhizium anisopliae can be used to control grubs, especially Beauveria bassiana is very successful in controlling grubs in sweet potato fields. After Beauveria bassiana was applied in sweet potato planting period, potato swelling period or larval peak period, the spores infected grub larvae and killed them. After three years of application, it still has a certain control effect. This method has the advantages of low drug resistance, less residue and strong pathogenicity, and has broad application prospects.

Chemical control: The main method is to spray grubs on sweet potato fields during soil preparation or planting, and apply chlorpyrifos, diazinon and other granules at points, with good effect and long lasting period. For sweet potato varieties with long growth period, drip irrigation of chlorpyrifos EC is effective from the end of July to the beginning of August.