A: Aphids are one of the main insect pests of rape. Before the five-leaf stage, the rape leaves are green and vulnerable to aphids. In the seedling stage, the locusts mostly concentrate on the back of the leaves and suck sap, causing growth stagnation and even death. Chemical control can be sprayed with 40% omethoate emulsion 1000 times. Farmers spray once a day before transplanting to prevent locusts from entering the field with seedlings. Wingless larvae and Ruojiao like to lurk in the rape leaves overwintering, and some hiding in the back of the rape leaves close to the ground over the winter, after the spring outbreak of aphid damage. Farmers should fully control once during the wintering period of rapeseed, before and after the opening of the rapeseed, 40% omethoate emulsion 80 to 100 ml, or 10 to 15 grams of 10% imidacloprid wettable powder spray control of water. Anesthesia Medical Co., Ltd. , https://www.trustfulmedical.com
What are the pests in winter rape?