Wheat aphids are one of the most significant pests affecting wheat production, and severe infestations can lead to yield losses of over 20%. According to recent surveys conducted by the Plant Protection Station in Beichen District, on April 27th, the average number of aphid colonies per plant was 2.8, with a maximum of 100 per plant, and all were wingless. By April 30th, the average number had risen sharply to 100.9 per plant, with a peak of 300 aphids per plant. Of these, 6% were winged, 94% were wingless, and 3% were malformed.
With limited rainfall this spring and rising temperatures, conditions are becoming increasingly favorable for the reproduction and spread of wheat aphids. To ensure effective control, it is recommended to implement centralized prevention and control measures. The threshold for intervention is when there are 500 aphids per 100 wheat plants, and action should be taken immediately once this level is reached. The optimal time for control is around May 15th.
Control methods include:
1. Spraying with 40% Dimethoate EC diluted at a ratio of 2000–3000 times.
2. Applying 10% Imidacloprid at a rate of 20–30 grams per 30 liters of water.
3. Using 50–70 ml of 40.7% formulation per acre.
Farmers are advised to monitor their fields regularly and take prompt action to prevent widespread damage. Early intervention is key to reducing losses and maintaining crop health.
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