Vegetable pods, commonly known as aphids, are pests that damage rapeseed crops. Species such as common radish aphids, cabbage aphids, and peach aphids are frequently encountered. These pests feed by sucking the sap from the plant, causing the leaves to curl downward, leading to yellowing, stunted growth, and in severe cases, wilting or even plant death.
The cabbage caterpillar is the larval stage of a moth that attacks rapeseed. Young larvae feed on the upper surface of the leaves, while older ones consume the foliage, creating holes in the leaves. In heavy infestations, only the petioles and veins may remain, severely affecting the plant's health.
Vegetable pods also refer to the larvae of the diamondback moth, which harm rapeseed plants. These larvae often burrow into the leaf tissue or stems from the back of the plant, causing irregular damage and weakening the crop.
Black-shelled insects belong to the order Coleoptera and are also harmful to rapeseed. The larvae typically feed on the underside of leaves and within the heart of the plant, causing holes and notches on the foliage. In extreme cases, the leaves may be reduced to just the petioles and veins.
To control these insect pests, farmers can use a solution of fresh high-fat membrane mixed with 40% omethoate diluted at 800–1000 times. Alternatively, a 50% anti-influx solution at 10 grams per 50 liters of water can be evenly sprayed. Other options include using rapeseed meal, cabbage caterpillar extract, vegetable meal, and black insect extracts. Injections such as 2.5% cypermethrin, 2.5% deltamethrin, or a mixture of 20% chlorpyrifos can also be effective. Regular monitoring and timely application of these treatments are essential for successful pest management.
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