What are aphids?
During the growth of crops and horticultural plants, a tiny but surprisingly destructive insect is quietly threatening the green industry. This aphid, known as the "plant vampire," has become an important control target in the global agricultural field due to its superior reproductive ability and diversified survival strategies. Analysis of the hazard characteristics of aphids: Biological characteristics and parasitic laws Aphids belong to Hemiptera, and their unique piercing and sucking mouthparts can penetrate through the plant epidermis to absorb juice. At a suitable temperature of 25 ° C, a single female insect can produce millions of offspring within 30 days. The main damage periods are concentrated in the spring germination period and the autumn shoot growth period, with special preference for the tender leaf parts of wheat, roses and other crops. In addition to directly absorbing plant nutrients, the honey dew secreted by aphids can induce coal pollution disease and spread more than 60 plant viruses at the same time. Statistics show that the annual grain loss caused by aphids in my country can reach 1.5 million tons, and the horticultural economic loss exceeds 2 billion yuan. The key technology of chemical control of aphid integrated control system recommended to use internal absorbent 40% imidacloprid water solvent 2000 times solution, combined with penetrant can improve the efficacy of 30%. The new compound scheme: 1.8% abamectin +25% thiamethoxam combination, can kill both adults and eggs. Pay attention to alternate use of drugs with different mechanisms of action to delay the emergence of drug resistance. Biological control system established natural enemy nursery area, releasing 300 Harmonia axyridis larvae per mu. The combined release of aphidius wasps and laceflies can reduce the insect population by 85%. Introduce functional plants such as cosmos as trap crops and cooperate with the release of syrhivorous flies to form a three-dimensional prevention and control network. The physical prevention and control plan uses yellow sticky boards for monitoring in early spring, with 15-20 sticks hanging per mu. In winter, tree trunks are painted white (ratio of quicklime: sulfur: salt =10:1:0.5), which destroys the living environment of overwintering eggs. Facility agriculture recommends a 50-mesh insect net combined with ultraviolet blocking film, and the effective isolation rate reaches 95%.
Faced with the continued threat of aphids, it is recommended to adopt a strategy of "prevention first, comprehensive prevention and control". By establishing a pest monitoring and early warning system, organically combining chemical control and biological control, and cooperating with agricultural management measures, a multi-level plant protection system has been built to ultimately achieve dual improvements in ecological and economic benefits.