Developmental Biology and Morphology of Peristenus digoneutis Loan (Hymenoptera: Braconidae: Euphorinae)
Developmental Biology and Morphology of Peristenus digoneutis Loan (Hymenoptera: Braconidae: Euphorinae)
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DOI：
10.1006/bcon.1995.1065
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发表时间：
1995-12
影响因子：
4.2
通讯作者：
S. Carignan;G. Boivin;R. K. Stewart
中科院分区：
文献类型：
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作者：
S. Carignan;G. Boivin;R. K. Stewart
摘要指腹小食心蜂是从欧洲引进的一种幼虫寄生蜂，现已在新泽西州建立起对紫花苜蓿上腐烂的植物害虫Lygus lineolaris的生防剂。要评估其对土著物种的影响，需要从物种层面确定其未成熟阶段。在实验室解剖寄生的褐飞虱若虫，获得各发育阶段的标本。在21±1℃，18：6的条件下，在菜豆上单独饲养若虫，以覆盖寄生蜂的所有未成熟期。鸡蛋在5天后就会成熟。有三个幼虫龄期，前两个在寄主体内蜕皮，第三个从寄主出来。第一龄持续8天，第二龄至少持续4天，第三龄在离开寄主前持续数小时。在最后一龄的蚕茧中，蛹发育2周，然后是前成虫，对于第二代个体来说，前成虫进入滞育期约8个月。美洲斑潜蝇、美洲斑潜蝇和拟黑斑潜蝇终龄幼虫的口硬化体不是可靠的鉴别特征。然而，前成虫阶段的成虫特征可以用来区分外来的洋地龙和两个本地种。
Abstract Peristenus digoneutis is a larval parasitoid that has been introduced from Europe and is now established in New Jersey as a biological control agent against the tarnished plant bug Lygus lineolaris, in alfalfa. The evaluation of its impact on indigenous species requires the identification of its immature stages to species level. Specimens of each stage of development of P. digoneutis were obtained by dissecting parasitized tarnished plant bug nymphs in the laboratory. The mirid nymphs were individually reared on green bean, Phaseolus vulgaris L., at 21 ± 1°C, 18:6, to cover the entire development of all immature stages of the parasitoid. The egg matures in 5 days. There are three larval stadia, the first two molting inside the host while the third emerges from the host. The first instar lasts 8 days, the second at least 4 days, and the third lasts a few hours before exiting the host. In a cocoon spun by the final instar, the pupa develops for 2 weeks followed by the preimago, which enters diapause for a period of about 8 months in the case of second-generation individuals. The mouth sclerites of the final instar larvae of P. digoneutis, P. pallipes, and P. pseudopallipes are not reliable distinguishing characters. The adult characters of the preimaginal stage, however, can be used to distinguish the exotic P. digoneutis from the two native species.