What are the control methods for wheat sharp eyespot?

AbstractWheat sharp eyespot is mainly controlled by an integrated approach combining chemical control with agricultural measures. At sowing time, varieties with relatively good disease resistance should be selected, and a single resistance-source variety should not be planted over a large area. Before sowing, seed treatment can be carried out with fludioxonil suspension concentrate, tebuconazole suspension seed dressing, or triadimefon wettable powder. During the growing period, nitrogen, phosphorus and potassium fertilizers should be applied rationally to improve the disease resistance of wheat. After entering the jointing stage, difenoconazole·propiconazole emulsifiable concentrate can be used in appropriate amounts.

1. Control methods for wheat sharp eyespot

1. To control wheat sharp eyespot, an integrated approach combining chemical control with agricultural measures should be adopted; only in this way can wheat sharp eyespot be effectively prevented.

2. According to the local climate and environment, varieties with relatively good disease resistance can be planted, and at the same time the rational layout of wheat varieties should be planned well; a single resistance-source variety should not be planted over a large area.

3. During the growing process, more organic fertilizer should be applied, formula fertilization should be adopted, and nitrogen, phosphorus and potassium fertilizers should be applied rationally. Do not apply only nitrogen fertilizer or apply it excessively. Rational fertilization can control excessive vegetative growth of wheat and promote robust root growth, thereby improving the disease resistance of wheat.

4. During this period, sowing should be carried out at a suitable time, avoiding early sowing, and precision sowing technology for wheat can be adopted to reduce the sowing rate of wheat.

5. After wheat turns green, the green-turning water should be applied early or lightly; do not use flood irrigation, to prevent long-term excessive humidity between plants. During the growing period, weeds in the field should be removed in time, and in the rainy season, water should be drained promptly after rain, which helps control the occurrence of diseases and insect pests.

6. Before sowing wheat, seed treatment with chemicals should be carried out. During this period, 2.5% fludioxonil suspension concentrate at 100-200ml/100kg seed, or 0.8% cyproconazole·tebuconazole suspension seed coating at a chemical-to-seed ratio of 1:40-50, or 15% triadimefon wettable powder at 0.03% of seed weight can be used for seed treatment, or 5% tebuconazole suspension seed dressing at 70-80g per 200 jin of seed.

7. In spring, when wheat enters the jointing stage, 30% difenoconazole·propiconazole 10g per mu, or 5% jinggangmycin 40g, or 12.5% diniconazole wettable powder 15g, or 10% difenoconazole water-dispersible granules 20g can be used per mu; the control effect is 20%-30% higher than seed treatment alone.

8. During this period, using 30% difenoconazole·propiconazole emulsifiable concentrate not only has a relatively good effect on controlling wheat sharp eyespot, but also has a good effect on lodging resistance and increasing yield, with a yield increase of about 2%-10%. If wheat sharp eyespot is relatively severe, spray once more after an interval of 10-15 days.