Doing Well in the Prevention of Liriomyza sativae in Autumn
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one. Insect pest situation Currently, the occurrence of Liriomyza sativae on legume crops in the autumn has generally occurred. On September 3rd, according to the survey results at the station and Huangdu station in Dengjiajiao Village, five different growing conditions and different types of jack bean crops were investigated, except for the newly emerged seedlings. The bean field blocks did not appear harmed, and all other growing fields appeared to be infested. Individual plots were planted earlier and the damage to the leaves had reached the middle of the plant, and the insect index reached level 2. The single leafworm tract averaged 3.1, the highest single leafworm tract was 4.6, and the lowest single leafworm tract was 1.5. At present, Liriomyza sativae is gradually developing on the damage of autumn beans, and all kinds of worms exist on the pods, and low-instar larvae account for 15-20%. two. Trend Analysis This year, Liriomyza sativae will continue to be a relatively serious year in some vegetable growing areas of our region. The main feature of this year is early occurrence. The peak of damage is 7-10 days earlier than in previous years, and the relative concentration occurs. Occurrence areas, the second is mainly based on legume crops, is expected to appear in mid-September, early October, there will be two damage peak. three. Prevention and control opinions The prevention and control of Liriomyza sativae on the one hand requires attention to prevention and control strategies. On the other hand, we must pay attention to prevention and control techniques in order to achieve good control results. 1. Targets for prevention and control: Crops controlled in the fall, combined with planting conditions, mainly autumn beans, taking care of the cultivation of cucumbers, tomato crops. 2. Prevention and treatment time: According to the current situation of insect pests, this year's autumn leaf spot fly should do a good job of prevention and treatment in mid-September and early October. 3. Attention prevention and control technology: Liriomyza sativae overlaps generations. During the period of prevention and control, various insect states exist in the field. The first one is prevention and control of young age, and the second is continuous prevention and control. 4. Select appropriate pesticides: Liriomyza is mainly larvae that invade the foliage for food damage and should use pesticides with stomach poisoning, internal absorption, and fumigation. 5. Recommended pesticide species: ciprofloxacin, penicillin, farmland music, insecticides, and Hisun Sanling.