Prevention and control should implement the plant protection policy of "prevention first, comprehensive prevention", focusing on agricultural prevention, physical prevention and biological prevention, scientifically coordinating the use of chemical prevention and control, strictly controlling the frequency of drug use, observing the safety interval, controlling pests and diseases below the allowable economic threshold, and controlling pesticide residues within the national green food standards, so as to achieve the purpose of safety, high quality and harmlessness.
① Set yellow boards to trap and kill aphids: 100cm× 20cm Yellow boards are hung between rows or plants at a density of 30-40 pieces/mu, which is higher than the top of plants to trap and kill aphids. Generally, the oil should be repainted once every 7 days to 10 days.
(2) Using insecticidal lamps and sex pheromones to trap and kill pests. Install insecticidal lamps and sex pheromones in the fields to trap and kill pests.
(3) When selecting pesticides, it is forbidden to use dimehypo in the middle and late growth period of cauliflower, so as to avoid red and green hairy flowers from flower heads. All kinds of pest control should also focus on prevention, and prevention should be carried out as soon as possible.