Cotton blight, also known as rot disease or black root disease, is caused by the fungus *Rhizoctonia solani*. This pathogen can infect cotton seeds before they germinate, leading to poor seedling emergence and rotting of the buds. Once the seedlings emerge from the soil, yellowish-brown lesions appear at the base near the soil surface and gradually spread around the entire stem, eventually causing the plants to wilt and die.
Senior agronomist Zhang Chuanyi explained that cotton blight is a common fungal disease affecting cotton during the seedling stage. After the plastic mulch is applied, the seedlings often struggle to adapt to the new environment, especially when temperatures are low and rainy weather persists. These conditions create a favorable environment for the development of the disease.
The primary sources of infection include the mycelia, sclerotia, and bacterial carriers present in the soil, as well as infected plant debris. When the seedlings grow slowly or weakly, they become more vulnerable to infection. The cotyledons are particularly susceptible to the disease.
To control the occurrence of cotton blight, Zhang Chuanyi recommends root irrigation or foliar spraying. He emphasized that when applying foliar sprays, it's important to spray slowly so the solution can penetrate into the root zone effectively, helping to prevent the disease.
For seed treatment, one method involves using Tianda 2116 dip and seed-type bags. For every 10 kg of cotton seeds, mix 2–3 pounds of water with 0.5 g of 99% bavistin (benomyl) and soak the seeds after drying.
Another recommended treatment is to use 50% carbendazim diluted 800 times or 70% thiophanate-methyl diluted 800 times, combined with 70% mancozeb manganese at 600 times dilution.
A third option is to apply Tianda 2116 Zhuangmiaoling at 600 times dilution mixed with 99% xylloxane at 3000 times dilution through root irrigation or foliar spraying.
These methods can significantly reduce the risk of cotton blight and improve the health of young cotton plants. It's essential to follow proper application techniques and maintain good field hygiene to prevent the spread of the disease.
Antimicrobials Drugs
Antimicrobial drugs are a class of drugs used to treat infections caused by microorganisms such as bacteria, viruses, fungi, and parasites. These drugs work by either killing the microorganisms or inhibiting their growth and replication include antibacterial drug,antimicrobial agents,antimicrobial medicine,broad spectrum antimicrobial.
There are several types of antimicrobial drugs, including antibiotics, antivirals, antifungals, and antiparasitics. Antibiotics are used to treat bacterial infections, while antivirals are used to treat viral infections. Antifungals are used to treat fungal infections, and antiparasitics are used to treat parasitic infections.
Antimicrobial drugs can be administered orally, topically, or intravenously. The choice of drug and route of administration depends on the type and severity of the infection, the age and health status of the patient, and the sensitivity of the microorganism to the drug.
However, the overuse and misuse of antimicrobial drugs have led to the development of antimicrobial resistance, which is a major public health concern. To prevent the spread of antimicrobial resistance, it is important to use these drugs only when necessary and to follow proper prescribing guidelines.
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