Vegetable pods are a term used to describe several pests that damage rapeseed crops. Among them, the most common are the radish aphid, cabbage aphid, and peach aphid. These pests often attack the same plants simultaneously. They feed on the sap of the rapeseed, causing the leaves to curl downward, the plants to turn yellow, and growth to be stunted. In severe cases, the plants may wilt and even die.
The cabbage caterpillar is the larval stage of the cabbage moth, which can cause significant damage to rapeseed fields. Young larvae feed on the upper surface of the leaves, while older larvae consume the foliage, creating holes in the leaves. In extreme cases, only the petioles and veins remain.
Vegetable pods also refer to the larvae of the diamondback moth, which harm rapeseed by burrowing into the leaf tissue or stems from the back of the plant's heart, often leading to serious damage if left unchecked.
Black-shelled insects belong to the order Coleoptera and are known to damage rapeseed crops. The larvae typically feed on the underside of the leaves and the inner parts of the plant, causing holes and notches on the foliage. In severe infestations, only the petioles and veins are left behind.
To control these pests, farmers can use a mixture of fresh high-fat film with 40% omethoate diluted at 800–1000 times, or apply a solution of 50% anti-influx at 10 grams per 50 liters of water. Other options include using rape meal, cabbage caterpillar extract, or black worm oil. Additionally, a combination of new high-fat film with 90% trichlorfon crystals or 80% dichlorvos EC diluted at 800–1000 times can be sprayed. Insecticides such as 2.5% cypermethrin, 2.5% deltamethrin, or 20% cyhalothrin can also be used in combination. Since most of these pests target the leaves and the growing heart of the plant, it's crucial to spray thoroughly on both areas to ensure effective pest prevention. (Source: China Plant Protection Network – Wei Linfei)
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