Vegetable pods refer to a group of pests that damage rapeseed crops, including the common radish sprout, cabbage sprout, and peach amaranth. 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 overall 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 causes significant damage to rapeseed. Young larvae feed on the upper surface of the leaves, while older larvae consume the foliage, creating holes in the leaves. In heavy infestations, only the petioles and veins of the leaves remain.
Vegetable pods are also the larvae of the diamondback moth, which harm rapeseed plants. These larvae typically bore into the leaf tissue or stems from the back of the plant's heart, causing visible damage and weakening the plant structure.
Black-shelled insects belong to the order Coleoptera and are known to damage rapeseed crops. The larvae usually feed on the underside of the leaves and within the heart of the plant, resulting in holes and notches on the foliage. In extreme cases, only the petioles and veins are left behind.
To control these pests, farmers can use a mixture of fresh high-fat membrane with 40% omethoate diluted at 800–1000 times. Alternatively, a solution of 50% anti-influx at 10 grams per 50 liters of water can be sprayed evenly. Other options include using rapeseed meal, cabbage caterpillar, rape meal, or black worm treatments. Additionally, a combination of new high-fat film with 90% trichlorfon or 80% dichlorvos EC diluted at 800–1000 times can be effective. Insecticides such as 2.5% cypermethrin, 2.5% deltamethrin, or 20% cyhalothrin can also be used in combination for better results.
Since most of these pests target the leaves and the growing heart of the plant, it is crucial to focus spraying efforts on these areas. Regular monitoring and timely application of pesticides can help prevent serious infestations and ensure healthy crop development. (Source: China Plant Protection Network, Wei Linfei)
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