长春地区大豆田蓟马种类鉴定及黄蓟马种群动态

为了在大豆生产中更好地防治蓟马类害虫,于2017年长春地区的大豆田中调查蓟马种类及消长动态。结果发现,大豆田有1亚目2科5属6种蓟马,横纹蓟马(Aeolothrips fasciatus)、黄蓟马(Thrips flavus)、豆喙蓟马(Mycterothrips glycines)、齿裂绢蓟马(Hydatothrips dentatus)、烟蓟马(Thrips tabaci)和花蓟马(Frankliniella intonsa)。根据成虫特征编写了本地区大豆田蓟马种类识别检索表。调查发现,黄蓟马是本地区的优势种,发生高峰期为盛花期至始粒期。初步明确了该虫在大豆植株上的垂直分布规律:即主要分布于大豆植株上层叶片的第1叶位到第5叶位,主要在叶背面活动,成虫、若虫在各个物候期虫口数量与大豆叶位之间的关系以逻辑斯蒂模型拟合度较佳。

Identification of thrips and population dynamics of Thrips flavus in Changchun soybean fields

To provide reference for pest control in soybean fields, species and population dynamics of Thrips flavus were investigated in Changchun in 2017. Investigation found that 6 species which belonged to 1 suborder, 2 family and 5 genus as Aeolothrips fasciatus, Thrips flavus, Mycterothrips glycines, Hydatothrips dentatus, Thrips tabaci and Frankliniella intonsa. The key to identification was listed based on morphological characteristics of their adults. Blossom thrips (T. flavus) is the dominant species in this region. The peak period of T. flavus was from the flowering period to the beginning of pod-filling period. The vertical distribution of T. flavus on soybean plants was preliminarily defined, distributed mainly in the upper leaves of the soybean plants on the first to the fifth leaf position of plant and on the dorsal sides of the leaves. The relationship between the number of adults and nymphs and the leaf position in each phenophase was better fitted by logistic model. The investigation and study of thrips species and population dynamics were to provide reference to the future pest management.