论文部分内容阅读
1985年湖北应山县水稻发现大面积蝗虫危害,全县发虫总面积达11500亩。据余店区7月11日调查:发虫面积2800亩,占该区中稻总面积的8％;最严重的亩有虫5500～11000头,叶被害率达66.7％。小稻蝗占总虫量的77％,中华稻蝗占总虫量23％。采取药剂与人工捕捉相结合的办法,取得了较好的防治效果。据县测报站和余店区农技站的多点试验结果,每亩用杀虫双0.8斤或甲胺磷0.5斤,加水120斤(机动喷雾器加水20斤)喷雾,一次可杀死稻蝗22.5％。7月10日调查,药前虫口密度72头/丈~2,10日下午4点用药,6点半观察,1平方丈死虫4头,(3龄前若虫3头)晕死而落水41头,11日上午7点观察,死虫15头,(3龄前若虫9头、成虫2头,3龄后若虫4
Yingshan County, Hubei Province in 1985 found a large area of grasshopper hazards, the county a total area of 11,500 acres of hair worm. According to the Yudian District survey on July 11: hair insect area of 2800 mu, accounting for 8% of the total area of the region’s rice; the most serious mu has insects 5500 ~ 11000, leaf damage rate of 66.7%. Small locusts accounted for 77% of the total number of insects, Chinese locusts accounted for 23% of the total number of insects. To take the combination of pharmaceutical and manual capture methods, and achieved good control effect. According to the multi-point test results of County Metrology Station and Yudian Agricultural Technology Station, 0.8 mu of insecticide, 0.5 kg of methamidophos and 120 kg of water (20 kg of motorized atomizer plus water) per mu were sprayed once to kill the rice locust 22.5%. July 10 survey, the drug before the mouth density 72 head / husband ~ 2,10 on the afternoon of medication at 4 o’clock, 6:30 observation, 1 square root dead insects 4, (3 nymphs before 3) dizzy and fell into the water 41 Head, observed at 7:00 on the 11th, 15 dead insects, (3 nymphs before the age of 3, 2 adult adults, 3 nymphs 4