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Cotton field to prevent snails
In recent years, the increase in rainfall, improved soil moisture, and expanded cotton intercropping areas have led to a significant rise in fallen leaves in fields. This has created favorable conditions for snail infestations, resulting in higher snail populations in cotton fields. As a result, it is essential to pay close attention to monitoring and managing these pests.
Snails typically complete one life cycle per year. They overwinter beneath the roots of winter crops, in haystacks, or in loose soil. In March, they begin feeding on overwintering crops, and by early April, some snails start to attack cotton seedlings on the seedbeds. After the beginning of April, when cotton seedlings are transplanted, the damage becomes more severe. During the seedling stage, snails cause broken leaves, loss of growth points, and even plant death.
During the bud stage, snails crawl along the stems and foliage of cotton plants, feeding on leaves, buds, flowers, and young bolls. This results in leaf damage, flower drop, and cracked bolls, which can reduce yield and quality. In the boll-opening stage, snails feed on moist cotton fibers inside the newly opened bolls, causing exposed seeds, closed bolls, and rotting bolls. Their secretions and excrement also contaminate the lint, further lowering the quality of the final product.
To effectively manage snail infestations in cotton fields, a combination of agricultural and chemical methods should be used. Field debris and weeds from intercropped crops should be removed regularly. During the snail spawning season, frequent soil cultivation helps expose eggs to the sun and wind, leading to dehydration and death. At peak snail activity, dried weeds with a strong aroma can be used as a natural deterrent.
Chemical control methods include using baits such as 6% polyacetal carvacene granules mixed with food scraps, cottonseed meal, vegetables, lettuce leaves, or tender grass. These baits should be scattered in the field in the evening to attract snails and reduce their population effectively. By combining these strategies, farmers can better protect their cotton crops from snail damage and ensure healthier yields.