Opinions on Prevention and Control of Diseases and insect pests of Winter Wheat from sowing to Seedling stage

The sowing work of winter wheat in our city is about to begin. in order to do a good job in the prevention and control of winter wheat diseases and insect pests and ensure the quality and strength of wheat seedlings, I stood on September 21-22 to investigate the underground pests and gray planthoppers in the main wheat producing areas of our city, such as Beitou, Cuijiazhuang, Xindianzi, Dongxinzhuang, Liu Beizhai, Ping'an City, and so on. The following control suggestions were put forward.

1. Wheat underground pests are expected to occur lightly. According to: grub 0.29, 0.18 less than in previous years, and golden needle worm 1.01, 0.09 more than in previous years. Prevention and control measures: you can choose underground insecticide to spread on the soil or mix it with base fertilizer evenly into the soil, or choose seed coating agent 50 grams mixed with water 1.5 kilograms and seed 20 kilograms 30 kilograms.

2. Wheat dwarf disease is expected to occur slightly. According to: the population density of gray planthopper is 0.003 head / ft 2, the natural virus carrying rate is 0.002%, the incidence of wheat cluster dwarf disease in induced nursery is 0.001%, and the average incidence of weeds in the field is 0.0001%. Control measures: spraying 80% dimethoate EC 800 × 1000 times, or 10% aphid lice net wettable powder 1500 times 1 times twice at seedling stage to control gray planthopper, reduce virus transmission vector and reduce the incidence of wheat rosette dwarf disease.

3. Wheat total erosive disease is expected to occur slightly. Control measures: 15% powder rust rather than wettable powder 60g 100g mixed with water 1kg seed 50kg, pile up for 4 hours before sowing.

4. Weeds in wheat field are expected to occur moderately. According to the investigation of weeds in the induced nursery, the main weeds are Artemisia annua and shepherd's purse, and the average weed density is 35 plants / square meter. It is expected that weeds will occur moderately in wheat fields before winter in our city. Control measures: during the period of 3-6 leaves after winter wheat seedlings, 10% benzenesulfuron-methyl wettable powder was sprayed with 10% benzosulfuron-methyl wettable powder 10 grams and 45 kilograms of water.

Other measures: appropriate late sowing, the best sowing time in our city is October 1-5, and control the vigorous growth of wheat before winter.