Doing Well the Prevention and Control of Pests in Early-season Spike
At present, the early rice is about to break into the full heading stage (most heading around June 10th). It is a critical period for the prevention and control of diseases and insect pests. It is important to focus on the prevention of rice planthopper and sheath blight, and the prevention and control of leafhoppers and rice blast disease. Work to ensure a good harvest.
1 Rice planthoppers: It is expected that most of them will develop in the middle and partially re-emerged. At the end of May, 189 were captured, and the amount of relocation was small. There was no obvious migration peak. In the end of May and early June, there were 225 to 1135 hundred worms in the census, and there were more than 2,000 locally. With the migration of foreign adults and hatching of eggs, the amount of insects will continue to rise. It is necessary to focus on prevention and control.
The peak period of most young instar nymphs is expected to be around June 10 (a majority of field heading) and continue until harvest. Wherever there are more than 10 insects in each cluster, the pesticide should be applied immediately and reapplied after 15-20 days. Pharmaceutics: 10% imidacloprid 30-50g or 25% buprofezacin 50g or 25% pymetrozine 20-30g, old worms or adult crops should be mixed with dichlorvos or razulfuron or yewsansan (mixture may not add).
2 Sheath blight: It is expected that there will be heavy hair loss. It is now at the peak of horizontal development, with recent rainy weather, high humidity in the field, and rapid development in vertical development. At present, the field bursts are 10-35%, and re-emerging fields are 60-80%.
Where more than 20% of the tussock field should be treated immediately with pesticides, it can be reapplied at the full heading stage. Pharmacy: 30% love seedling 15 ml.
3 Cnaphalocrocis medinalis: 2 (1) generations of light hair, recent rainfall is conducive to egg hatching, is expected to light hair in the 3 (2) generation. The main areas are Hetian and Ganqingtian along the river, and the number of moths per mu is between 110-330, and the peak volume is 6 at the beginning of the season. It is suitable for prevention and control and has a multiplier effect. It can be selected from Fugo, Abamectin, AA. Salt, indoxacarb, Kang wide, etc. Before 6/10, the field can be applied in conjunction with the spike period, and after 6/15, the field should be treated with a single application before 6/10.
Medium rice needs to be controlled once and for all, and it cannot sit at the heading stage.
4 Rice blast: The early leafhoppers were not seen, but the main varieties were planted for many years, and the prevention and treatment of panicle blast should not be neglected. Main defense plots: susceptible varieties. During the prevention and control, it is necessary to pay attention to the application of the drug during the end of pregnancy and heading period, and 20%, 75% tricyclazole or 100 grams can be used, and sulfur-containing tricyclazole should be avoided. Spraying should be fine mist. The amount of water should be enough, and 45-60 kilograms of water should be used for mu. If you catch a sunny or rainy day, you need to make up the rain within 2 hours.
In order to save the use of pesticides, early rice can be mixed and used for the prevention and control of rice planthoppers, aphids, sheath blight, and spikelets in the near future.
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