利用信息化学物质研究松树小蠹虫的扬飞规律

Emergences of bark beetles on pine monitored based on bait trapping

于2005～2006年在辽宁省千山利用信息化学物质野外诱捕黄色梢小蠹Gryphalus fulvus、红松根小蠹Hylastes plumbeus、横坑切梢小蠹Tomicus minor及纵坑切梢小蠹Tomicus piniperda成虫,结果显示:这4种小蠹在4月18日至8月10日期间都明显出现2次扬飞高峰。第1次扬飞高峰持续均为30d左右,第2次扬飞高峰期约为15d;黄色梢小蠹和红松根小蠹第1次扬飞高峰期在5月上中旬出现,第2次扬飞高峰期分别在7月中下旬和上中旬;横坑切梢小蠹与纵坑切梢小蠹的扬飞高峰期基本一致,第1次扬飞高峰期为4月下旬到5月上旬,第2次扬飞高峰在7月上中旬;结果同时还表明诱虫量第1次扬飞高峰一般都明显大于第2次,只是黄色梢小蠹在首次利用信息化学物质进行监测且密度较高时例外。

Field tests with bait traps were conducted to monitor bark beetles on pine,Cryphalus fulvus,Hylastes plumbeus,Tomicus minor and Tomicus piniperda,from 2005 to 2006 in Mount Qianshan of Liaoning. The results showed that two emergence peaks were found for these four species of bark beetles from April 18 to August 10,in which the first peak lasted about 30 days,and the second about 15 days. In C. fulvus and H. plumbeus,the first emergence peak was early to middle May,and the second was middle to late July and early to middle July,respectively. T. minor and T. piniperda had similar emergence peaks,i.e. the first peak in late April to early May and the second in early to middle July. The number of beetles trapped in the first peak was higher than the second except C. fulvus because of its higher population density in first trapped.