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一、我场二化螟猖獗因子 我场自1955年冬修筑圩堤,1956年开始栽培水稻,是年三化螟、大螟、二化螟等,侵害水稻,各占10％左右,损失相当严重,经过冬耕灭虫,至1957年,大螟大大减少,三化螟基本消灭。惟二化螟则猖獗异常,经调查了解其猖獗因子如下: 1.二化螟为杂食性,能在各种植物上越冬,不若三化螟系单食性,较容易消灭。 2.我场四周的地理环境,除西面靠近路司口外,其余三面,都是荒洲,荒洲上杂草丛生,二化螟羽化成虫,
I. Field rampant factor My field since 1955 the construction of levee dike, 1956 began to cultivate rice, the annual three borers, Sesamia inferens, Chilo suppressalis, etc., against rice, each accounting for about 10% loss of considerable Seriously, through the winter plowing pest control, to 1957, Sesamia inferers greatly reduced, the three borer basically eliminated. However, Chilo suppressalis is rampant abnormalities, the investigation to understand the rampant factors are as follows: 1. Chilo suppressalis omnivorous, can be overwinter on a variety of plants, if the Chilo suppressalis simplex, easier to eliminate. 2. My field around the geographical environment, with the exception of the West near the mouth of the Secretary, the remaining three sides, are wasteland, wasteland overgrown with weeds, stem borer adult,