Detailed Guide to Identifying and Controlling Peach Aphids on Peach Trees

The peach aphid, also known as the peach red aphid, cabbage aphid, or greasy bug, among other names. Its main hosts include broccoli, purple cabbage, cauliflower, Chinese cabbage, radish and other cruciferous vegetables as well as other vegetables. Adults and nymphs pierce and suck sap on the leaves, causing the leaves to curl and deform, affecting head formation. They damage the tender stems, tender leaves, flower stalks and tender pods of seed-producing plants, causing the flower stalks to twist and become deformed, so they cannot bolt, flower and set seed normally. In addition, aphids also transmit a variety of viral diseases.

Occurrence characteristics: generation overlap is extremely severe. In heated greenhouses, they reproduce parthenogenetically on vegetables throughout the year. In the open field: in late April of the following spring, winged aphids are produced and migrate to already transplanted cabbage and cauliflower to continue parthenogenetic reproduction, entering overwintering in late October. In China, there are two peak occurrence periods, in spring and autumn. The peach aphid has a strong attraction to yellow and orange, and a negative attraction to silver-gray.

Control methods: 1. Use yellow dishes or yellow boards to trap and kill winged aphids, which can achieve the effect of controlling aphids and preventing disease. 2. Chemical control: spray with 50% pirimicarb or imported 50% pirimicarb wettable powder at 2000 times dilution, 10% imidacloprid wettable powder at 3000 times dilution, or 4.5% beta-cypermethrin emulsifiable concentrate at 3000 times dilution. 3. Use silver-gray film in the field to repel aphids, laying it at intervals.