腹管食螨瓢虫对桔全爪螨捕食量及功能反应

平均气温17.7℃腹管食螨瓢虫幼虫期(15.3天)平均捕食桔全爪螨各虫态800.7只;气温24.2℃3～4龄幼虫平均日捕食猎物卵104.6粒,或若螨59.2只,或成螨44.2只;气温15.6℃雌成虫平均日捕食桔全爪螨各虫态77.3只;气温23.4℃日平均猎食卵78.5粒,或幼螨55.1只,或若螨65.1只,或成螨62.2只。腹管食螨瓢虫雌成虫对桔全爪螨卵、幼螨和成螨的功能反应为Ⅰ型反应,其功能反应的参数成螨为1.8707,幼螨为2.6225,卵为1.0325;对若螨为Ⅱ型反应,参数为1.0601。3～4龄幼虫对桔全爪螨的卵和若螨为Ⅰ型反应,参数为1.9598和1.3626;对成螨为Ⅲ型反应,参数为1.2715。雌成虫捕食量大于雄成虫。成虫和幼虫都较为嗜食猎物的卵。

PREDATION AND FUNCTIONAL RESPONSES OF STETHORUS SIPHONULUS KAPUR(COLEOPTERA,COCCINELLIDAE)ON THE CITRUS RED MITE

The results showed that at 17.7℃ during larva stage(15.3 days), a larva of Stethorus siphonulus preyed on 800.7 citrus red mites of different stages.At 24.2℃ the 3rd-4th instar larva preyed on 104.6 eggs,or 59.2 nymphae,or 44.2 adults of mites per day.At 15.6℃ the female adult preyed on 77.3 mites of different stages per day.At 23.4℃ the fem- ale adult preyed on 78.5 eggs,or 55.1 larvae,or 65.1 nymphae,or 62.2 adults of mites per day.The functional responses of female adult of S.sip- honulus ou prey's egg,larva and adult all belonged to Response-Ⅰ.The pa- rameter of functional responses on prey's adult,larva and egg were 1.8707, 2.6225 and 1.0325 respectively.The functional response on prey's nympha belonged to Response-Ⅱ and the parameter was 1.0601.That of the 3rd-4th instar larva on prey's egg and nympha belonged to Response-Ⅰ and the parameter were 1.9598 and 1.3626 respectively,and that on prey's adult be- longed to Response-Ⅲ and the parameter was 1.2715.The predatory number of female adult of S.siphonulus was more than that of male one.Both adult and larva prefered mite eggs.