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水稻二化螟chilo supre ssalis(Walker)属磷翅目螟蛾科,此虫在我区一直没有文字记载,81年在我县稻区普遍发现,标本送自治区植保站,经杜秉仁同志鉴定,确系二化螟。82年调查在昌吉和乌鲁木齐一带普遍发生。两年来我们对水稻二化螟在米泉县稻田的发生规律和防治进行了一些观察和试验,整理如下: 一、生活经过及习性 1、越冬:多以5—6令幼虫在稻茬和稻草茎秆内越冬(少数4令)。经抽样调查:82年越冬后稻茬平均百茎有虫5.14头,稻草平均百茎有虫0.58头。稻茬越冬自然死亡率为47.39％,稻草越冬自然死亡率为53.85％。83年越冬后稻茬平均百茎有虫9.59头,稻草平均百茎有虫1.08头,稻茬越冬自然死亡率31.5％,稻草越冬自然死亡率50％
Rice stem borer Chilo supre ssalis (Walker) is Phorate Pyralidae Pyralidae, the insects in our area has no written records, 81 years in our county rice areas were generally found, specimens sent to the plant protection station Autonomous Region, identified by Comrade Du Bingren, indeed Department of Chilo suppressalis. The 82-year survey was widespread in Changji and Urumqi. In the past two years, we conducted some observations and experiments on the occurrence and control of the rice stem borer, Chilo suppressalis, in rice paddy fields in Miquan County, and sorted out as follows: 1. Life Habitat 1: Wintering: Culm winter (a few 4 order). The sample survey: after 82 years of overwintering, the average number of rice stalks 5.14 head of a hundred insects, rice straw per plant average 0.58 head. The natural mortality rate of winter wheat stubble was 47.39%, and the natural death rate of winter wheat straw was 53.85%. In the 83-year-old winter rice, the average number of stems and pests was 9.59, that of the straw was 1.08, that of the rice stems was 31.5%, that of the straw was 50%