Feed Additive,Corn Gluten Meal Liquid,Cat Food Corn Gluten Meal,Corn Gluten Meal Mice JILIN COFCO BIO-CHEM AND BIO-ENERGY MARKETING CO., LTD , https://www.cofco-biotech.com
Do a good job of "six controls"
Cotton boll rot is primarily caused by two main factors: disease and pest infestation. The first cause involves various fungal and bacterial diseases such as wilt, anthracnose, red rot, pink mold, black fruit, and others. These pathogens can remain in the field over winter, attached to seeds or infected bolls. In the following growing season, they are spread through wind, rain, and insect vectors. They can enter the cotton bolls through wormholes, wounds, or directly through the boll surface, leading to boll rot. High humidity, especially during August and September, combined with heavy rains and strong winds that damage the bolls, creates ideal conditions for disease development.
Additionally, excessive nitrogen fertilizer application or high plant density can lead to excessive vegetative growth, which reduces air circulation and light penetration within the crop. This environment increases humidity, making the field more susceptible to boll diseases. Poor pruning practices also contribute to this issue, as old leaves are not removed in time, further worsening the microclimate.
The second major cause of boll rot is pest damage, particularly from bollworms. These pests create numerous wounds on the plants, providing entry points for pathogens and increasing the likelihood of boll rot.
To effectively manage and prevent cotton boll rot, a comprehensive approach known as the "Six Controls" should be implemented:
First, carefully manage nitrogen fertilizer use. Under normal conditions, applying about 10 kg per mu of nitrogen during the flowering and boll formation stages is sufficient. For fields that have already experienced boll rot or show signs of early aging, it's better to reduce or avoid peach fertilizer. Using growth regulators like chlormequat or mepiquat can help control excessive growth and prevent flower and boll drop.
Second, manage field humidity. During rainy seasons, proper drainage is crucial to prevent waterlogging, which favors pathogen growth. Ensuring that water drains quickly after rain helps maintain healthy root systems and reduces disease risk.
Third, manage plant growth. For lush cotton fields, regular pruning of lower and middle leaves is essential. For fields with excessive growth, techniques like "opening the skylight" and removing excess foliage can improve ventilation and light penetration, reducing the chances of boll rot.
Fourth, apply fungicides to target common diseases like red rot and anthracnose. Spraying solutions such as 70% thiophanate-methyl wettable powder (diluted 1000 times), 50% carbendazim wettable powder (500 times), or 80% mancozeb wettable powder (600 times) on flower buds, tender bolls, and young bolls every 5–7 days can significantly reduce disease incidence.
Fifth, control pests like bollworms and red bollworms. Early intervention is key—capture mature larvae manually and apply chemical treatments to control younger stages before they cause significant damage.
Lastly, remove affected bolls promptly. For unripe bolls with signs of infection, pick them and dispose of them outside the field to minimize disease spread. Fully matured rotten bolls should be harvested, stripped, and dried as soon as possible to reduce economic losses.
By implementing these six strategies, farmers can effectively manage and reduce the occurrence of cotton boll rot, ensuring healthier crops and better yields.
Next Article
Do a good job of "six controls"