How to control sunflower borer?

How to control sunflower borer? Please introduce in detail the method of sunflower borer in which the larvae eat seeds and sunflower plates, which seriously affects the yield and quality of sunflowers. According to the investigation in different sunflower planting fields in the past two years, the seed insect feeding rate was 11.2%, the high was 40.6%, and the average grain insect feeding rate was 21.4%. In order to improve the yield and quality, sunflower borer must be controlled. Chemical control, in the early stage of larval damage, spray with 90% trichlorfon or 50% Batan 500X, or spray with 20% fenpropathrin or 2.5% deltamethrin or BT emulsion. Each disk is sprayed with 40ml 50ml liquid, and the effect is better after spraying every 5ml every 7 days. At 8: 00 to 9: 00 at night during the adult epidemic period at the end of July and the beginning of August, smoke was applied to the field twice with smoke sprayers, with 80% dichlorvos 10 mi 15 ml per mu. This method saves labor and water, and is simple and feasible. It can also be applied in combination with artificial pollination, using powder puff (using cotton and cardboard material to make a homodisk-sized, central protruding powder) each time to glue 4ml 5g 5% trichlorfon powder or 2% methyl parathion powder to gently rub 4m 5m 5 discs, with a dosage of 2 kg per mu. Rub it again every 7 days, and the effect should be better after the dew dries every morning. Irrigation in autumn and winter is a good way to eliminate overwintering pests. After maturing, the first generation of larvae spun silk from the sunflower plate and fell to the ground and dived into a soil layer of 15ml and 20cm deep to overwinter. The implementation of autumn and winter irrigation can eliminate most of the overwintering insects. In addition, the selection of hard-shell insect-resistant varieties is also a way. Click to get more sunflower planting techniques click to get more grain and oil crop planting techniques