The larvae of walnut larvae feed on the lower epidermis and mesophyll of the foliar with the instar larvae, and hatched larvae from mid-July to early August began to harm the leaves. Biological control measures Shanghai wasp is a dominant natural enemy of the yellow moth. After adopting measures to protect Shanghai wasps, the parasitism rate of the winter moth is over 40%, which can effectively reduce the overwintering base number of the yellow moth. Black light traps kill adults from mid-June to mid-July, and blacklights are trapped to kill adult insects. When the small larvae clustered on the back of the leaves in early July, the young larvae can be removed by cutting off the leaves in a timely manner. During the middle and late August, the mature larvae concentrate the human larvae to catch the mature larvae during the suitable sites for the pods on the branches of the branches. Focus on killing. Spraying and controlling the use of highly toxic pesticides, reducing the number of fight drugs, biological agents, mineral pesticides and other non-hazardous agents. In the early larvae at the beginning of July, a 300-500-fold Bt emulsion was sprayed on the leaves of the larvae. After 10 days, 25% of the larvae were sterilized by 2000 times of the larvae, or 30% of the moths were administered 2000 times. Blood Collection Set, Safety Blood Collection, Blood Collection Device, Blood Collection Needle with Holder, Blood Collection set with Holder, Butterful Needle with Holder Blood Collection Set,Safety Blood Collection,Blood Collection Device,Blood Collection Needle with Holder Luck Medical Consumables Co.,LIMITED , https://www.luckmedical.com