One and one generation corn mash 1. Degree of Occurrence: It is expected that the 1st generation of corn borer will be moderate to moderately heavy, and the main damage will be spring corn. If it is not controlled, the mosaic rate will reach more than 25%. 2, the main basis: 1 After the winter of corn borer, the source number of insects was higher, and the number of live insects in winter was 48, which was 5.8% higher than last year. The mortality rate was 4.2% after winter, which was 5 percentage points lower than last year. 2 The spring maize area is small and scattered, and some plots will become trapping fields, which will cause serious damage. 3Climate conditions have no adverse effect on oviposition and hatching of corn borer. 4 Overwintering larvae have long and irregular eclosion time, and the first generation has a long time of damage. On May 10th, the number of eggs per 100 eggs in the double-membrane-premature spring corn field has reached 18. 5 Developmental progress analysis showed that the first generation of adult corn borer was 5/5-20 days old, and the first generation of egg hatching was 5/18-6/5 days. 3. Prevention and control period: According to the early growth period in the field, it can be controlled in the period of corn big bell and the field mosaic rate is below 10%. The specific time is: 5/18-22 days of double-film spring corn, sowing late spring Maize was controlled twice for 5/25-30 days and 6/5-10 days respectively. Second, corn leaf rust Some double-membrane precocious spring corn has occurred and heavier. On May 10, the survey rate was 31%, and the diseased leaf rate was 5%. The peak period is expected to occur from late May to early June. Three, corn worms Investigation on May 10th, the rate of the double-film spring corn was 85% or more, and 100 strains of pods were 1,800-2,500 heads. Fourth, control methods and pharmaceuticals 1, fresh spring corn acres with BT powder 50g plus four seasons red 1 bag plus flour rust 75g watered 100 kg uniform spray. 2, dry food spring corn in the end of the heart of the leaf 1 with corn snacks or friends, carbofuran mixed soil for foliar application, control corn borer. 2 acres with Rui Ba 30 grams or 50 grams of convulsions + BT powder 20 grams plus flour rust 100 grams of water evenly spray the entire plant to achieve the effect of both diseases and insect pests. all products origin from XinJiang or Mongolia. quality good for foods. Nuts Kernels,Seeds Kernels,Dry Roasted Nuts Kernels,Natural Nuts Kernels COFCO HEBEI INTERNATIONAL TRADING CO., LTD. , https://www.cofcohb.com
Occurrence and Control of Maize Pests and Diseases