【摘要】 利用人工气候箱设置4个不同的培养温度饲养盗毒蛾,并结合野外调查,研究兰州市盗毒蛾为害木藤蓼的生物学特征.结果表明:在兰州市盗毒蛾1a可发生2代,以老龄幼虫作茧越冬,成虫产卵于木藤蓼的叶片背面,5～8d孵化,幼虫5龄,主要取食木藤廖嫩叶,老熟后多卷叶或在叶背树干缝隙或近地面土缝中结茧化蛹,蛹期7～12d,成虫在夜间进行交尾和产卵活动,羽化2～3d即可产卵,卵数十粒至数百粒排成块状,每只雌虫产卵量为153～529粒;卵、幼虫、蛹和产卵前期的发育起点温度分别为(12.559±2.24)、(7.155±1.80)、(6.649±0.83)、(3.727±1.72)℃,有效积温分别为(73.62±3.75)、(691.18±15.24)、(114.78±11.36)、(42.51±5.00)d/℃,整个世代的发育起点温度和有效积温分别为(17.384±0.95)℃,(1 190.73±26.18)d/℃.更多还原

【Abstract】 Biological characteristics of Porthesia similis on Polygonum aubertii were studied by incubation and investigation in Lanzhou.The results showed that P.similis had two generations each year and overwinters as larva.The eggs were laid on the back of the leaves and to be hatched within 5~8 days.The larva generally had five instars and usually fed on the tender leaves of fallopia aubertii.When the larva became mature,the larva cocooning and pupate on the back of leaves,the gap of trunk or on the ground.The pupal stage lasted 7~12 days.At night the adult mates and after 2 or 3 days of emergency it laid eggs.A female P.similis laid 153~529 eggs.The developmental threshold temperatures of the eggs,the larva,the pupa and preoviposition period was(12.559±2.24)℃,(7.155±1.80)℃,(6.649±0.83)℃ and(3.727±1.72)℃,respectively.The effective accumulated temperature was(73.62±3.75),(691.18±15.24),(114.78±11.36) and(42.51±5.00) d/℃,respectively.The developmental threshold temperature and the effective accumulated temperature of the whole generation were(17.384±0.95)℃ and(1 190.73±26.18)d/℃.更多还原