鄂西南地区松褐天牛生物学特性及发生规律研究

Study on the Biological Characteristics and Occurrence Law of Monochamus Alternatus Hope in the Southwest Area of Hubei

采用室内饲养观察法与饵木诱集观察法 ,对松褐天牛 (MonochamusalternatusHope)在湖北西部地区的生活习性、生活史、发生规律进行了研究 .结果表明 ,该虫在该地区 1年 1代 ,以低龄幼虫和老熟幼虫分别在韧皮部和木质部的虫道内越冬 .翌年 4月中旬化蛹 ,5月上中旬始见成虫 ,5月下旬至 6月下旬为成虫羽化盛期 .幼虫于 6月中旬开始取食 ,1 0月进入越冬 .发育期温度升高可缩短各虫态的发育历期 .多雨潮湿可抑制成虫活动和幼虫感病 .在树干的中段虫口密集 .成虫喜食长势良好的树木枝皮 ,喜欢在新伐倒木和生长衰弱的立木上产卵 .采用饵木和诱捕器诱集效果良好 .

Through the observation of Monochamus Alternatus Hope raised in the lab or trapped by baiting wood, the paper makes a research on their life characteristics, life cycle and their occurrence law in the west of Hubei. The study shows that the generation of Monochamus Alternatus Hope occurs in a year. The young lavae and old lavae live through the winter in their tunnel of the phloem and xylem respectively. In the middle of April of the next year they will pupate. The adult insect can be seen in the early or middle of May . It's the flourishing period of Monochamus Alternatus Hope energence from late May to late June. The lavae start to look for food in middle June and are in overwintering period in October. In the period of development, if temparature increases, the developing duration of all kinds of Monochamus Alternatus Hope can be contracted. What's more, if it is rainy and damp,the activities of adult insects and infectious illness of the larvae can be controlled. In the middle of the trunk, Monchamus Alternatus Hope is densely populated. Adult insects like to eat the flourishing branches and barks of trees and also like to lay eggs on the lying new-cut trees and the standing trees in a poor growth.It is effective to trap Monochamus Alternatus Hope by using baiting wood and trapping apparatus. In this way , it can provide the reliable base theoretically for controlling and forecasting Monochamus Alternatus Hope.