1987年5月8—13日,我区马洋等5个乡的2700多亩早稻爆发了稻象虫。丛害率在88—95％,每丛有成虫3—5头,每亩7—8万头。大山下宋国参、林维绸两户5亩早插早稻,每丛平均14头,丛害率100％,亩有成虫29.4万头。被害稻苗成排穿孔、叶片断折、披垂水面;顶叶发黄停长,而后枯萎死亡。当地老农反映,这是百年罕见的。 据本人观察,该虫在本地1年发生两代,以戈、幼虫在稻田边土中、杂草丛间、落叶 From May 8 to May 13, 1987, as many as 2,700 mu of early rice in five townships such as Ma Yang in our district broke out the rice weevil. Cong rate of 88-95%, 3-5 per adult head of an array of 7-8 million per acre. Under the mountain Song Guoshen, Lin Wei Chou two 5 mu early inserted early rice, an average of 14 per bundle, Cong rate of 100%, mu of 294 000 head. The row of rice seedlings punctured perforation, leaf fracture, drape water; parietal lobe yellow long stop, and then withered death. Reflect the local farmers, this is a rare century. According to my observations, the pest occurred in the local one year two generations to Ge, larvae in the paddy fields, weeds, deciduous