A generation of corn borers has a trend
Based on the overwintering base number, moth trapping amount, field egg quantity survey, historical facts and meteorological forecast over the past years, it was predicted that the generation of corn pods in our county occurred moderately, and some of the plots were overweight. Prediction basis: 1. The winter and winter bases continued to be high, with an average of 34.6 live worms per 100 rods before winter, which was 4.9 higher than in previous years. After the winter base survey, the average number of live rodents was 34.1, which was higher than the previous year. With 2.4 heads/hundred shots, there were 119 live worms in the top 100 poles (Toudao Township in Shiban Town), and the survival rate for wintering was 95.2%. 2. Large and concentrated moth traps: On May 17th, the forecasting lamp had seen adult worms. It was close to last year. As of June 29, a total of 1,174 adult worms of winter corn borer had been detected, including 504 female moths. Accounted for 42.9% of the total number of moths, the total number of moths was more than 212 in the same period of last year, and the moth peak period was on June 14-17. There were 370 accumulated moths, accounting for 31.5% of the total number of moths, including June 14 and June 16. For the moth peak day, 104 moths and 165 moths were captured, respectively, and the peak and peak days were 8–10 days later than last year. 3. Survey of egg volume and insect volume in the field. On June 8 and 12 in the field, a fixed survey was conducted. The average number of eggs was 3.5 eggs, and the highest 100 eggs accumulated 9 eggs (head and groove). The hatching rate was 25.7%. The average of the field survey was 3. One hundred strains have 1.75 eggs, and the highest 100 strains have 8 pieces of eggs (Kaoshan). The average mosaic rate is 1.56%, and the highest mosaic rate is 5% (head and groove). From June 26 to June 30 in the field census, the average mosaic rate was 14.6%, and the highest mosaic rate was 35%. The highest single plant had 2 larvae and it was mostly 2 years old. The township technicians are expected to go to the field in time for inspection. When the mosaic rate is 10%, they should be immediately organized for prevention and control. Control methods: 1, using 1.5% phoxim granules, 1-1.5 grams per plant, directly into the heart bell horn, you can also use kung fu or chlorpyrifos granules. 2, with 4.5% high efficiency cypermethrin EC 1 kg, water 20 kg, 50 kg of furnace ash particles. During the prevention and control, each corn was sprinkled into the heart and leaves with "three fingers and one armpit". About 250 strains of granules were added per kilogram or granules of 50% phoxim, and 1:100 poisonous soil per strain. 2 grams. Ppe Nitrile Gloves,Aql4.0 Industrial Gloves,Ppe Non-Medical Equipment,Disposable Powder Free Nitrile Gloves Puyang Linshi Medical Supplies Co., Ltd. , https://www.linshimedical.com