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一、基本情况 南晒洞地处宜章县城南郊,气候温暖,土质肥沃,早、中、晚稻混栽,杂草丛生。历年来病虫害发生最早,为害最严重。1957年,稻飞虱猖獗为害,成灾倒禾期比其他地区早3—4天,损失稻谷28万斤,占总产量的43％。1958年,全社(原城南高级社)冬季三光,虽比任何一年都搞得好,但没有掌握稻飞虱以卵块在游草中越冬的习性,因此,河边、塘边、圳边的游草成为它的潜伏地。4月下旬稻飞虱纷纷向稻田迁飞,游草中的基数很大,平均每平方尺有虫9.6只,加之该年早插、
First, the basic situation South drying hole is located in the southern suburbs of Yizhang County, the climate is warm, fertile soil, early, middle and late rice mixed planting, overgrown with weeds. Pest and disease occurred over the years the earliest, the most serious damage. In 1957, the planthoppers were rampant, and they were 3-4 days earlier than any other areas during the disaster. They lost 280,000 kg of rice, accounting for 43% of the total output. In 1958, the whole community (formerly Southern High-class Society) winter three light, although better than any year, but did not master the planthopper with egg block in the grass in the winter habit, therefore, the riverside, pond, Grass becomes its lurking ground. In late April, planthoppers migrated to the paddy fields one after another. There was a large base in the grassy weeds with 9.6 pests per square foot on average. In addition,