In recent years, some cotton fields have experienced a phenomenon known as "young cracking," where young bolls or buds split prematurely. This issue can be attributed to several factors, including pests such as cotton worms, larvae of the cabbage beetle, and Spodoptera litura, which are chewing pests. Other culprits include pupae, whiteflies, and blind stink bugs, all of which contribute to plant damage. In addition, excessive and uneven use of high-concentration pesticides, early aging of plants, red leaf blight, and mechanical injury can also play a role in this problem.
While a small amount of young cracking may not significantly affect yield, it is important to enhance management practices to reduce its occurrence. Proactive measures should be taken to monitor and control pest populations effectively.
Pest control should focus on key species like the cotton bollworm and flea beetles. Special attention must be given to sudden outbreaks of pests such as the cabbage looper (Spodoptera litura), whitefly (Bemisia tabaci), and other invasive species. Late-season blind stink bugs should also be monitored closely, as their feeding can cause serious damage to developing fruits.
When using pesticides, it's crucial to follow proper guidelines. The concentration of the solution must be strictly controlled, and mixing should be done according to instructions. Avoid increasing the concentration without necessity. Spraying should be even and thorough, and high-concentration sprays should never be applied during midday heat, as this can harm the crop and reduce effectiveness.
Fertilization should be carefully managed. Before and after August 5th, fields with poor soil fertility, those showing signs of early aging, or those that have been over-fertilized with flower and boll nutrients should receive light and timely applications. A urea application rate of 5-8 kg per mu is recommended, while potassium fertilizer should be avoided unless necessary. In Bt cotton fields, potassium-rich foliar fertilizers should be applied in the later growth stages to prevent red stem blight and premature aging.
By implementing these integrated management strategies, farmers can better protect their crops and ensure more stable yields. Regular field inspections, proper pesticide use, and balanced nutrition are essential for long-term success in cotton cultivation.
Franziskaner 450ml ,Light Franziskaner For A Lazy Afternoon,Rich Creamy Franziskaner,Fruit-forward Franziskaner For A Dessert Pairing
Yanbian Baichuan Import and Export Trade Co., LTD , https://www.baichuanbeer.com