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1968年以来,褐飞虱(Nilaparvata lugens Stal.)在我省稻区连年大发生,造成较大的损失,其虫源一直不明.根据我们1973-1975年的调查结果,认为褐飞虱在我省绝大部分地区不能越冬.1975年与定海县农技站协作,在接近公海的普陀县庙子湖岛(北纬30°24’,东经122°72’,海拔10-133.7公尺)的一个小山岗上用汽油灯进行观测,结果于6月25日诱到褐飞虱1只,6月27日诱到35只.而这个岛从来不种水稻,距离稻区25公
Since 1968, Nilaparvata lugens Stal. (Nilaparvata lugens Stal.) Took place in successive years in the rice-growing area of our province, causing great losses and its origin has been unknown.According to our survey of 1973-1975, The area can not be wintering. In 1975, in collaboration with Dinghai County Agricultural Technology Station, on a small hill near the high seas (30 ° 24 ’north latitude, 122 ° 72’ east longitude and 10-133.7 meters above sea level) Petrol lamps were observed, resulting in the brown-louse infestation on June 25 and 35 on June 27. The island has never planted rice and is 25 kilometers from the rice paddies