In recent days, many vegetable farmers have reported a severe infestation of whiteflies in their greenhouses. Despite implementing various control methods such as fumigation and spraying, the results have been disappointing. After careful analysis, I believe the main reasons behind this issue are as follows: First, many farmers lack a proper understanding of whiteflies. These pests belong to the order Hemiptera, specifically the family Aleyrodidae. Both adult whiteflies and nymphs feed on plant sap, causing yellowish spots and eventual wilting or even death of plants. Their high reproductive rate leads to large populations, and they secrete honeydew after feeding, which reduces the quality and market value of vegetables. Additionally, the wings of adult whiteflies are coated with a waxy layer, making it difficult for insecticides to adhere effectively. Whiteflies are less active during cool morning hours but become highly mobile when temperatures rise.
Second, the timing of pesticide application is often incorrect. Most farmers apply sprays when the sun is out and there is no dew on the leaves, which reduces the effectiveness of the treatment. Third, the choice of pesticide formulations is not always scientific. Many farmers assume that expensive pesticides are more effective, or they rely on recommendations without considering the actual needs of the crop. In reality, a well-formulated, cost-effective solution can be just as effective as pricier options.
To address the whitefly problem, the following measures are recommended: First, install insect-proof nets on vents to prevent adult whiteflies from entering the greenhouse. Yellow sticky traps can also be used, as whiteflies are attracted to the color yellow. Second, adjust the timing of pesticide applications to early morning when whiteflies are less active. This increases the chances of successful control. Third, optimize the pesticide formulation. For example, a mixture of 5000-fold diluted insecticide with 600-fold diluted netting agent or a combination of 5000-fold diluted insecticide with 1000-fold diluted general spray can be applied every 5–7 days, alternating between different products to prevent resistance. To reduce sooty mold caused by honeydew, adding a thiophanate-methyl 800-fold solution or carbendazim 600-fold solution to the spray can help improve overall results. By combining these strategies, farmers can achieve better whitefly management and protect their crops more effectively.
Food Additives
Henan chinamian foods CO.LTD , https://www.ooossooo.com