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Cotton field rotten bell should be early defense
August and September are critical periods for cotton development, as the bolls grow, mature, and eventually open. This phase is essential for ensuring a successful harvest. However, during these months, the weather tends to be wet and humid, creating ideal conditions for the growth and spread of various bacterial diseases. The poor field microclimate worsens the situation, especially when there are many bolls present, increasing the risk of damage to the crop. Therefore, it's crucial to implement preventive measures before any signs of rot appear. Here are three key strategies to protect your cotton fields:
Under similar weather conditions, areas with high cotton populations, low-lying terrain, or dense vegetation are more prone to infection. To combat this, farmers should start applying protective treatments from late July. A 600-fold dilution of 65% Daisen zinc water can be used, or alternatively, 400-fold solutions of wettable powders such as 50% methyl thiophanate or 50% mancozeb. Focus on spraying the bolls located on the lower parts of the fruit branches. Apply the treatment every 7 to 10 days, and consider repeating it 2 to 3 times depending on the severity of the conditions.
To reduce humidity in the field, it's important to manage water effectively. Drainage ditches should be maintained, and mechanical pumping can help remove excess water quickly. Farmers with the means can also dig through the ditches to prevent waterlogging, which can lead to root rot and other issues.
Improving light penetration in the field is another vital step. The lower parts of the cotton plant often suffer from poor air circulation and limited sunlight, creating a damp environment that encourages bacterial growth. Removing unnecessary branches, axillary buds, small shoots, and yellow leaves can enhance airflow and reduce moisture levels on the plant surface, helping to prevent boll rot.
By taking these proactive steps, farmers can significantly reduce the risk of disease and ensure healthier cotton crops during the critical growing season.