Rootworm is one of the most destructive pests affecting cabbage crops. These pests feed on the outer layer of the roots, creating wounds that allow soil-borne pathogens to enter, leading to root rot and eventual plant death. If left uncontrolled, infestations can spread rapidly across entire fields, causing significant losses for vegetable farmers. To effectively manage and prevent this pest, several key strategies are recommended:
1. **Soil Treatment Before Planting**: Prior to sowing cabbage, it's advisable to apply 2.5 to 3.5 kg of phoxim granules per mu (approximately 667 square meters). Mixing the granules with chemical fertilizers before application helps kill fly eggs and larvae in the soil, reducing the risk of infestation from the start.
2. **Ground Spraying**: When the cabbage plants have developed 2 to 3 true leaves, a dusting of 1.5 kg of 2.5% trichlorfon powder per acre can be applied directly to the ground. This method helps prevent adult seed flies from laying eggs in the field, thus breaking the pest’s life cycle early.
3. **Root Application with a Mixture**: Once the cabbage has reached 6 to 8 leaves, a mixture of grass ash, lime powder, and 2.5% trichlorfon powder in a ratio of 2:1:1 can be applied around the base of the plants. This not only prevents egg-laying by adult flies but also helps eliminate larvae that may already be present.
4. **Chemical Root Irrigation**: If root damage is detected during the growing season, immediate action is crucial. Applying a diluted solution of 90% crystal trichlorfon at a concentration of 600 to 800 times can help control the infestation by targeting the pests directly at the root level.
By implementing these integrated pest management practices, farmers can significantly reduce the impact of rootworms on their cabbage crops, ensuring healthier plants and better yields. Regular monitoring and timely intervention are essential for long-term success in pest control.
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