After spring, wheat enters the critical growth phase from green-up to jointing, which is a vulnerable period for several serious diseases such as full-blown wheat, sheath blight, root rot, and both bushy and yellow dwarf. It's also a time when pests like wheat spiders, underground insects, and weeds become more active. Therefore, it's essential to implement comprehensive pest and disease management strategies during this stage to ensure healthy crop development.
One effective approach is to combine proper agricultural practices with pest control measures. This includes timely irrigation, appropriate fertilization, and careful field management to enhance the wheat’s natural resistance to diseases. Additionally, proper field planning can help suppress weed growth and reduce competition for nutrients and water.
Chemical weed control should be carried out strategically. If autumn and winter applications were not done, it’s crucial to act during the early spring, specifically between late February and mid-March, when wheat has started to regreen. For fields primarily affected by broadleaf weeds, 5.8% Maixi EC at 10 ml per mu (approximately 50–60 ml per acre) is recommended. For monocotyledonous weeds, 3% emulsifiable concentrate of Fenoxaprop-P-ethyl at 25–30 ml per mu is effective. Mixing these agents can help control both types of weeds simultaneously. However, care must be taken to avoid herbicides that may cause crop damage. Long-lasting herbicides like chlorsulfuron and metsulfuron can lead to phytotoxicity in crops such as cotton, peanuts, and corn, so they should be strictly avoided. Similarly, 2,4-D butyric acid is highly toxic to broadleaf crops, and its use near cotton or peanut fields should be avoided to prevent accidental damage.
In recent years, wheat sheath blight has become a major concern, especially in high-yield areas, where it significantly impacts grain production. The key to managing this disease lies in seed treatment and foliar spraying. However, many farmers delay application or apply it too lightly during the regreening phase, leading to poor control outcomes. To address this, it's important to monitor pest and disease levels closely. When the sheath blight incidence reaches 15–20%, or when there are 3% underground pests per seedling, or 600 wheat spiders per square meter, immediate action is necessary.
For sheath blight control, 5% Jinggangmycin at 150–200 ml per mu mixed with 75–100 kg of water can be sprayed on the base of the wheat stems, with a second application after 10–15 days. For underground pests, 40% methyl isofluosal or 50% phoxim at 40–50 ml per mu can be used. To manage wheat spiders, 73% Kotel emulsion diluted 1500–2000 times is an effective option. Integrating chemical treatments with proper timing and dosage ensures better results and reduces the risk of resistance development.
Xos Syrup,Xylo-Oligosaccharides Food,Xos Prebiotic
Qingdao Bailong Huichuang Bio-tech Co., Ltd. , https://www.sdblcycn.com