1. 년 1회 발생하며 유충태로 월동한다. 2. 성충출현은 5월 중순부터 7월상순 사이며 최성기는 6원 상순이다. 3. 산란시기는 6원 상순부터 7월 중순까지이다. 4. 포란수는 약 200개 내외이며 난기는 10일 정도이다. 5. 난의 크기는 2mm, 성충의 크기는 숫놈이 약 17.0mm, 암놈이 21.0mm, 용의 크기는 약 20mm이다. 6. 피해는 직경이 20cm 내외의 굵고 수리가 약간 있는 수간에 형성층과 목질부 사이를 군서가해한다. 7. 탈출공의 크기는 5-6mm이며 수직으로 뚫어져 있고 깊이는 약 5cm 내외이다.

Xylotrechus rusticus (L.) is an important pest of poplars in Korea. The bionomics of the insect were studied to give some scientific bases for a development of the sound control measures. This study was carried out in the field and laboratory during the period from 1968 to 1969. The results ostained are as follows, The gray tiger longicorn has one generation in a year and overwinters as a larva. The adult appears during periods from the middle May to the early July, with peak in the early June and the eggs were laid in a trunk from the early June to the middle July. The mean body length of the adult was 17mm for the male, 21mm for the female and about 20mm for the pupa. The average number of eggs in an ovary were about 172 and about 2mm in length. The larva of the insect feed on the cambium under neath the bark, the diameter of the adult exit hole was about 5-6mm and 5cm in depth.

• 姜銓愉