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花曲柳窄吉丁潜在飞行能力初步研究

花匠小妙招
2024-12-11 13:26

摘要: 为了评估花曲柳窄吉丁的飞行潜能,利用昆虫飞行磨系统测定雌雄花曲柳窄吉丁成虫在不同光照时间、交配状态、取食状态和日龄条件下的飞行能力。结果表明:雌虫24 h内最远飞行距离5 500 m,雄虫最远飞行距离1 397 m,雌雄成虫间飞行距离差异显著;雌虫在24 h光照时间下飞行距离比L/D(昼/夜)=16 h/8 h光照周期下更远;交配雌虫与未交配雌虫在飞行距离上有显著差异,交配后雌虫飞行距离更远,而交配对雄虫飞行能力无显著影响;经取食并休息的雌虫飞行距离显著大于不取食不休息的雌虫;不同日龄未取食的花曲柳窄吉丁雌虫飞行能力存在一定差异,1日龄飞行能力最弱,13日龄最强,从1~2日龄开始飞行距离增加,2~4日龄飞行距离随日龄增加而减少,而在4日龄后飞行距离又随着日龄的增加而增加。说明花曲柳窄吉丁具有较长距离飞行的潜能,这可为该虫的传播扩散和风险评估提供一定依据。

Abstract: The emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) is a wood-boring beetle of ash (Fraxinus spp.) trees in China. In order to evaluate the potential flight capability of EAB, we determined the flight performance of male and female EAB adults at various mating stages, ages, feeding and resting periods as well as different photoperiods using a flight-mill system. The result show that the maximum flight distance of a female adult was 5 500 m and 1 397 m for a male adult among all the test insects during a 24 h testing period. 1) Females tended to fly longer distances than males;. 2) female adults flew farther when held under 24 h constant light than in a 16 light hrs/8 dark hrs photoperiod regime; 3 ) mated females flew farther than unmated ones with a statistically significant difference; 4) there was no significant difference between mated and unmated males in terms of flight distance; 5) females that were fed and rested flew significantly farther than those not fed or not rested; 6) for females at different ages, 1-day-old females flew the shortest distance while 13-day-old ones flew the farthest. Flying distances increased with the age of 1- to 2-day-old females, decreased in 2-to 4-day-old females and increased in 4- to 13-day-old females. Our study suggests that EAB adults have the potential capability of long distance flights, which provides evidence in assessing the spread and risks of this insect species.

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