In recent years, the harm of whiteflies to vegetables has been increasing year after year, especially for vegetables such as eggplants and melons. Many vegetable farmers report that white flies are still flying all over the house. Whitefly is so rampant, how to control it safer and more efficiently?
Combination of prevention and control: wide host of whiteflies, severe overlapping of generations, strong fertility, and wax powder on the body surface have always been difficult problems in greenhouse vegetables, and its movement is flexible, and it is difficult to control by spraying alone. The whiteflies on the previous stubble vegetables still often remain in the shed, so it is recommended to spray or smoke the greenhouse before the vegetables are planted to kill the adults and eggs in the greenhouse and then colonize. The weeds outside the shed are also parasitic sites for whiteflies, so weeds outside the shed must be removed early, and insect nets should be installed to prevent whiteflies from entering the shed.
Pay attention to the spraying parts: the whitefly adults are clustered on the back of the leaf, which has tenderness, so there are many new leaves on the upper part of the plant, and the unhatched eggs are mainly concentrated on the back of the leaf and the side branches of the plant in the middle layer and above Most of the eggs on the leaves have hatched, so vegetable farmers should pay more attention when spraying.
Killing insects and killing eggs: Adults, nymphs, and eggs of the whitefly are present in the shed at the same time. If only the insects are killed, the eggs and pupae will continue to hatch into adults, and will continue to harm vegetables. To ensure the prevention and control effect, attention must be paid to the simultaneous killing of insect eggs. Choose 1000-fold solution of imidacloprid or 1000-time solution of acetamiprid with better insecticidal effect together with 1000-time solution of thiazinone with good egg-killing effect.
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