柑橘大实蝇成虫的翅载和额外负载能力

对柑橘大实蝇Bactrocera (Tetradacus) minax (Enderlein)的有效管理受阻于对其成虫运动行为的较少的认识。通过测定其成虫翅载能力和忍受额外负载重量的能力， 从而确定其成虫所携带不同的额外负载的电子标签重量对其正常起飞的影响程度， 为制作合适的昆虫谐波雷达的电子标签提供技术参数。其雌雄成虫的翅载能力并没有随着成虫个体重量增加而降低， 也没有因为性别不同而存在差异。成虫经过正常取食和饥饿（只喂清水）变化处理， 其成虫平均净载重量约为11 mg。来自网室成虫忍受额外负载试验结果表明， 成虫额外负载7.3 mg重量或为占其自身体重大约23%重量对于其向上起飞行为有较少或没有直接的影响。结果进一步表明， 在确定昆虫谐波雷达技术跟踪其成虫携带的电子标签适合性时， 选择的电子标签的重量不能超过7.3 mg。

Wing loading and extra loading capacity of adults of the Chinese citrus fruit fly, Bactrocera (Tetradacus) minax ( Diptera: Tephritidae)

Effective management of the Chinese citrus fruit fly,Bactrocera(Tetradacus) minax(Enderlein)(Diptera:Tephritidae),is hindered by a lack of knowledge about its movements.By measuring the wing loading and extra loading capacity of adults of the Chinese citrus fruit fly,we determined the effect of weight of extra loading electronic tags on the ratio of upward to downward flights of flies,in order to provide technical parameters for making the feasibility of electronic tag for tracking natural movement of B.minax using harmonic radar technology.The wing loading of the Chinese citrus fruit fly was found not to decrease with increasing size over a wide range of individual sizes and independent of sex.The results indicate that an average wing loading of adults of Chinese citrus fruit fly is about 11 mg after normal food uptake alternated with food deprivation(only water is supplied).It is estimated from our results in a large screened cage that 7.3 mg(representing about 23% of adult’s weight) extra loading for the technique has no or minimal impact on the number of upward flights of adults of Chinese citrus fruit fly.The results further suggest that when we determine the feasibility of tags for the tracking of natural movement of B.minax using harmonic radar technology,the weight of electronic tags should be no more than 7.3 mg.