摘要
豆黄蓟马(ThripsnigropilosusUzel)在黑龙江省密山地区每年发生5～6代,以成虫越冬。第一及最末一代世代平均历期24d。中间各世代平均历期16.7d,雌成虫平均寿命17.6d。该虫主要以成虫和1～2龄若虫为害。叶背面虫量多于叶表面虫量,豆株上部幼嫩叶片多于中下部叶片。植株各器官上的虫量以叶上最多,次为嫩荚,茎及花器上很少。雌成虫可行孤雌生殖也可行两性生殖。每年的危害高峰在6月下旬到7月上旬。防治指标定为2～3片复叶时20头/株。药剂防治以具有内吸作用的乐果效果最佳。
Soybean thrips (Thrips nigropilosus Uzel) occur 5 to 6 generations in Mishan district in one year and get across the winter in adult. The first and last generations take 23 to 25 days in average,the others take 15 to 20 days in average. The harmful form is mainly in adult and 1 to 2 instar nymph. Female adult can live 17.5 days in eaverage. There are more amount of thrips on the surface of leaf than that oa the back and more on the yong leaf than on the old leaf. The amount on diffrent organs are diffrent. First is leaf, second is yong pod,few on stem and flower. The pest can reproduct not only by sexual reproduction but also by parthenogenesis. The harm peak is between tne last ten-day period of June and the first tell-day period of July. Its economic threshold are proposed also.
出处
《黑龙江八一农垦大学学报》
1994年第4期27-32,共6页
journal of heilongjiang bayi agricultural university
关键词
豆黄蓟马
生活史
防治
发生规律
大豆
: soybean thrips
life history
growth and decline rule
soybean economic threshold
