【摘要】 在实验室条件下评价了巴氏新小绥螨捕食南方根结线虫时的发育和繁殖情况,观察了其捕食行为,并测定了其对几种线虫的捕食量。该螨对线虫的捕食行为可分为猎物的寻找、固定、捕食、清理和静息等步骤,对水稻干尖线虫和南方根结线虫二龄幼虫(Mi-J2)的捕食量显著大于对虫体较大和活动性较强的腐烂茎线虫和自由生活的小杆线虫的捕食量;每头雌螨日捕食Mi-J2不少于25条。以Mi-J2为食的巴氏新小绥螨能发育完成生活史,并具有较强的繁殖能力,其卵期、幼螨期、前若螨期、后若螨期、产卵期、雌螨寿命、平均每头雌螨产卵量和日均产卵量分别为1.1 d、0.71 d、2.06 d、1.98 d、22.31 d、35.13 d、41.08粒和1.85粒,其内禀增长率、周限增长率均大于以腐食酪螨为食的巴氏新小绥螨,而平均世代周期和种群倍增时间均小于后者。更多还原

【Abstract】 Predatory behavior,development and reproduction of Neoseiulus barkeri(Hughes) on plant-parasitic nematodes Meloidogyne incognita,Aphelenchoides besseyi,Ditylenchus destructor and free living nematode Rhabditis sp.were evaluated under laboratory conditions.The behavior components of the predatory mite preying on nematode included searching,prey-fixing and feeding,chelecera-and-palp-clearing and resting.N.barkeri did not always consume a whole nematode.Residues of nematodes were sometimes found on agar surface.The number of live nematodes consumed was much more than dead ones.A.besseyi and second-stage juveniles of M.incognita(Mi-J2) were preferred to D.destructor and Rhabditis sp.,the later were larger and more active.N.barkeri was able to complete its life cycle on Mi-J2,and the average duration of egg,larva,protonymph,deutonymph,oviposition and female adult longevity were 1.1,0.17,2.06,1.98,22.31 and 35.13 days,respectively,and the daily consumption of Mi-J2 by a female mite was no less than 25.The daily oviposition,intrinsic increase rate(rm) and finite increase rate(λ) of N.barkeri feeding on Mi-J2 is 41.08,0.1842 and 1.2023,respectively,greater than those when it fed on Tyrophagus putrescentiae.These results show that N.barkeri has the potential to be a biological control agent of plant parasitic nematodes.更多还原