Rape aphid is a common disease in the cultivation of rapeseed. In severe cases, it will cause a certain yield loss for rapeseed. The following methods are simple to operate and have significant effects. The following is the following:
How should rapeseed aphids be controlled?
1. During the growth period of rapeseed, the weeds in the field and nearby areas are removed, and the seedlings are transplanted or transplanted to remove the stalks. After sowing, cover with the soil and spray the insecticide once before transplanting. Timely cultivating and cultivating soil, cultivating strong seedlings; rationally close planting, increasing ventilation and light transmission in the field.
2, yellow board traps aphids. In the seedling stage of rapeseed, a yellow plate is placed on the ground. The method is to use a 0.33 m2 plastic film, painted in golden yellow, and then coated with a layer of Vaseline or engine oil. The rack is 0.5 m above the ground and can trap a large number of winged mites.
3. Pesticide control. In the seedling stage, the rate of sorghum is 10%, the density of larvae is 1 to 2 per plant, and the stems of 10% of the twitching and flowering stage are aphids. When there are 3 to 5 mites in each branch, spraying begins. 20g of imidacloprid 20g per acre, or 30ml of 4.5% beta-cypermethrin, or 40-50ml of 3% acetamiprid emulsifiable concentrate, or 10-18g of 50% anti-converse WP, or 2.5% kungfu emulsifiable concentrate 10― 20 ml of water spray control.
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