亚洲玉米螟越冬代成虫扩散行为与迁飞可能性研究

作者于1987和1988两年在河北省衡水市当地越冬代亚洲玉米螟成虫盛发期,采用人工标放回收方法对其扩散行为及迁飞可能性进行了研究。两年分别释放人工饲养的标记玉米螟成虫15万和Lipaphis erysimi(kaltenbach), diamondback moth60万头,在45.5km半径范围内分别回收到标记雄蛾461和2650头,首次明确了我国北方亚洲玉米螟越冬代成虫的田间扩散飞行规律,95％集中在距释放点4km半径范围内;部分个体可扩散到6—30km半径范围内,最远距释放中心45.5km。成虫扩散飞行受风力、风向和温度影响。结果表明,亚洲玉米螟虽有远距离迁飞的潜力,但至少在越冬代发生期基本不存在大量远距离迁飞的可能性。

STUDIES ON BEHAVIOUR OF DISPERSAL AND POSSIBILITY OF MIGRATION IN ADULT OVERWINTERING GENERATION ASIAN CORN BORER BY USING RELEASE-AND RECAPTURE TECHNIQUE

Previous works of the authors showed that wild and artificially reared adult Asian corn borer Ostrinia furnacalis (Guenee) (ACB)had the potential of long distance flight as shown in flight-mill tests,i. e. over 100km/24hrs. In 1987 and 1988, under the cooperation of five institutions,field experiments were carried out to investigate the behaviour of dispersal and possibility of long distance migration in this insect species. 150- and 600-thousand artificially reared high quality ACB adult,labelled internally with 0. 01% of Calco Red/Sudan Blue 670(2222222222),were released in the two years, respectively. Surrounding the releasing site, 9 circles of 102 pheromone traps were arranged with a radius of from 1 to 40km (in the 1988 experiment, it was further extended into 200km)to recapture the males,no matter in which direction they might fly. The total number of recaptures was 461 and 2650 males,respectively. Among them, 95% of which were within the circle of 4km radius;a small amount were at the distance of 6 to 30 km and two 'champions' for the two years were both at the distance of 45. 5 km. The performance of dispersal was affected by wind velocity/directions and temperatures as well. The general tendencies of the two-year recaptures were highly similar. It was thus concluded that, at least, during the overwintering generation flight under natural conditions, the ACB adults did not perform long distance migration, although having such potentialities. The conclusion is of great importance in further IPM research of this insect species.