论文部分内容阅读
近年来由于荒地治蝗面积减少,有利蟋蟀繁殖蔓延,今年6月份以来干旱少雨,6—7月份降雨量仅有140—200mm,比常年偏少3、4成,多者达6成,蟋蟀低龄若虫期,粘土地土裂缝未出现雨冲泥灌,且低洼草荒地也未被水淹,为其卵孵化和低龄若虫成活提供了适生条件,因此造成了冀南蟋蟀的暴发。据8月15日调查邯郸地区发生蟋蟀40余万亩,馆陶县发生10万亩,肥乡县发生16万亩。据调查馆陶县每平方米有虫30—40头的地块有1万亩;10—20头地块有5万多
In recent years, due to reduced area of wasteland management locust, favorable crickets breeding spread, drought since June this year, rainfall in June-July was only 140-200mm, 3,4% less than normal, about more than 60%, crickets young In the period of nymphs, there was no rain-red mud irrigation in the crack of clay soil, and the low-lying grassland was not flooded, which provided conditions for egg hatching and survival of young nymphs, resulting in the outbreak of crickets in southern Hebei. According to a survey on August 15, more than 40 million mu of crickets occurred in Handan area, 100,000 mu occurred in Guantao County and 160,000 mu occurred in Feixiang County. According to the investigation, there are 10,000 mu of 30-40 plots per square meter in Guantao County; more than 50,000 in 10-20 parcels