Rape is one of the most common economic crops in China. It can be used not only as an oil for oil but also as a vegetable. In the process of rapeseed planting, you may encounter aphid problems. What should you do in the face of locusts?
Rape field aphid commonly used drugs
For the control of aphids on rapeseed, acetamiprid, pymetrozine, nitenpyram, butyl thiocarbamate, thiamethoxam, thiacloprid, deltamethrin, anti-carbazone and the like can be used. Some readers have reported that the use of the insecticides pymetrozine, butyl thiocarbazone, acetamiprid, thiacloprid and other drugs to control aphids is not good, which may be related to improper application methods such as insufficient dosage and uneven application. . In addition, the rapeseed seedling stage aphids are mainly clustered in the back of the leaf, and the focus on the spray on the back of the leaf is beneficial to improve the control effect.
Rape field locust control method
1 chemical control. At the seedling stage, the rate of sorghum plants is 10%, and there are 1-2 heads per plant. 10% of the stems or inflorescences of the twitching flowering stage have aphids. When each branch has 3-5 heads, the following chemicals are used for control: 1.8% Avico emulsifiable concentrate or 1.1% toxic work 1000-2000 times solution, sharp red WP 1000 times solution, 37% high chlorine * malathion l000-2000 times solution, 2.5% enemy kill emulsion 3000 times solution.
2 seed treatment. Use 100% of 20% succulent WP, 100 kg of seed dressing, or seed dressing with methylthiophosphorus, insecticidal phosphorus and carbofuran to prevent aphids during seedling stage.
3 cultivation control. Covering the ground with silvery gray, milky white and black mulch film about 50%, it has the effect of driving off the virus.
4 biological control. Feeding and releasing peaks, grasshoppers, ladybugs, scorpion flies and mold fungi can reduce mites. The control of rapeseed meal should be carried out in three periods: the first is the seedling stage (3 true leaves); the second period is the initial stage of Honda's bud; in the third period, more than half of the rapeseed plants are bolted to the height About 10 cm. However, these three periods also depend on the number of mites to determine the application of pesticides, especially in the pod-forming period should pay attention to the occurrence of mites, if the number is large, still need to apply drugs to prevent and control.
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