禾缢管蚜在不同温度条件下的飞行能力

通过利用昆虫飞行磨对室内饲养的禾缢管蚜Rhopalosiphum padi (Linnaeus)在不同温度(8℃一30℃)条件下飞行能力的测试结果。试验结果表明，禾缢管蚜的飞行距离和飞行时间在12℃～20℃时较大，平均飞行距离为6.614～8.219 km，平均飞行时间为5.074～7.003 h。在15℃时，单个个体的最大飞行距离和最长飞行时间分别达到26.231 km和21.153h：在8℃～10℃条件下禾缢管蚜较难起飞，即使起飞后飞行时间和距离均很短。在 23℃以上禾缢管蚜的飞行时间和距离逐渐缩短，30℃时禾缢管蚜起飞后很快就停止飞行。飞行速度随温度增高而加快，平均飞行速度在8℃时为o.781km/h，在30℃时达1.605km/h。

THE INFLUENCE OF TEMPERATURE ON THE FLIGHT PERFORMANCE OF RHOPALOSIPHUM PADI (LINNAEUS) MEASURED WITH A FLIGHTMILL SYSTEM

The flight performance of laboratory-reared winged adults of the bird cherry oat aphid Rhopalosiphum padi (Linnaeus), was nvestigated with a flight-mill system at several temperature grades (8℃-30℃). The results showed that the temperature range of 12℃-20℃ was suitable for flight of the bird cherry oat aphid, the averageflight distance was 6.614-8.219km and the average time of flight was 5.074-7.003 h.At 15℃, the maximum flight distance and flight duration reached 26. 231km and 21.53h respectively. It was difficult for the bird cherry oat aphid to take off at 8℃, and both the flight distance and flight duration were short after take-off. At 23℃ and above, the aphid was easy to take off, but the flight distance and flight duration were becoming shorter gradually with the rise of temperature. At 30℃, the aphid stopped flying shortly after take-off. The flight speed increased with increase of temperature, the averagespeed was 0.781 km/h at 8℃ and 1.605 km/h at 30℃.