In the mountainous rice fields, especially in the cold-sinking fields of Shanyin, rice-stem fly has become a major pest, and its degree of damage has exceeded that of the second-stage rice borer. The rice larvae used larvae to feed on the rice near the growing point near the stem end of the rice. The first generation caused the rice leaves to distorted and could not grow normally, or the extracted leaves became a “fence†burst; the second generation damaged young ears. The stems and grains of the stalks caused the lack of stalks and stalks in the ear of the rice to be extracted, resulting in the occurrence of rice head production, which is not the head of the head and the head of the head. Liriomyza larvae are small, long-lasting, and the feeding sites are hidden. At the early stage of the damage, the farmers often do not pay attention, and when large-area found that the damaged rice plants are controlled again by spraying drugs, the liquid can not be directly sprayed on the body, and the control effect is poor. In recent years, the author has adopted the following methods to prevent and control rice fly by using multiple practices in the field and achieved good results. 1. Wet Putian in the heart of 2 leaves 1 seedlings (late April to early May), shallow surface layer irrigation, combined topdressing "weaning fertilizer", with 3% per hectare of rice fields with 2% carbofuran granules Disperse evenly. Keep water for 5 days to 7 days after application and do not drain. 2. Early plugging (Dry seedlings) field, early throwing (floppy disk seedlings) field (before the end of May), before transplanting or throwing dumplings, combined with surface fertilizer, 3% carbofuran granules per 667 square meters of paddy fields 2 kg And 4.5% of the enemy's powder 2 kg and surface fertilizer mix and spread. 3. Young panicle differentiation stage 1 and stage 2 (middle-maturing varieties on or before July 15th), 5 cm deep water layer in the field, 3% carbofuran granules 2.5 kg mixed potassium chloride per 667 m 2 paddy field Kilograms, spread well after spreading; 5 days later every 667 square meters of paddy field use 40% omethoate EC 100 ml plus 90% crystal trichlorfon 100 grams, 50 kilograms of water for foliar spray. Carbofuran, omethoate, alpha-dimethicone and other pesticides have a strong systemic effect and have a long duration of efficacy. They are used to control rice-dwarfed migratorous plants. The control efficiency at the seedling stage can reach 90.4%. "Ascension" can be controlled below 10%, and it can also treat pests such as plague warts and rice planthoppers. (Author: Wang Zhongyao Unit: Yuanling County Bureau of Agriculture)
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