宜昌市窑湾乡１９９８年柑桔黑刺粉虱发生严重，引起严重的烟煤病，叶片变黑失绿，严重影响产量和果实品质。调查其原因：一是１９９７年冬季不冷，导致越冬基数偏高；开春后到８月底，天气基本是晴雨相间，温湿度适宜，极有利其发生。二是忽视了第１～２代成虫、幼虫的防... Yichang City, Wanxiang Township in 1998 citrus black whitefly serious occurrence, causing severe bituminous coal disease, the leaves turn black and green, seriously affecting the yield and fruit quality. Investigation of the reasons: First, the winter of 1997 is not cold, leading to a high base of overwintering; spring to the end of August, the weather is basically rain and phase, temperature and humidity suitable, very beneficial to its occurrence. The second is to ignore the 1st to 2nd generations of adults, larvae of the ...