Suitability of Bemisia tabaci (Hemiptera: Aleyrodidae) instars for the parasitization by Encarsia bimaculata and Eretmocerus sp. nr. furuhashii (Hymenoptera: Aphelinidae) on glabrous and hirsute host plants
Suitability of Bemisia tabaci (Hemiptera: Aleyrodidae) instars for the parasitization by Encarsia bimaculata and Eretmocerus sp. nr. furuhashii (Hymenoptera: Aphelinidae) on glabrous and hirsute host plants
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DOI：
10.1080/09583150701595042
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发表时间：
2007-09
影响因子：
1.4
通讯作者：
B. Qiu;P. D. De Barro;Yu-rong He;S. Ren
中科院分区：
文献类型：
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作者：
B. Qiu;P. D. De Barro;Yu-rong He;S. Ren
摘要双斑隐翅虫和粉虱Eretmocerus sp.的寄主选择性。天然橡胶。室内研究了寄生烟粉虱的呋喃哈希菌及其在羽衣甘蓝、茄子、黄瓜和番茄上的发育情况。两种寄生蜂均接受烟粉虱各若虫阶段，但双斑小蜂偏爱3龄和4龄，而Er。SP.天然橡胶。在选择和非选择条件下，Furuhashii偏爱二龄和三龄幼虫。不考虑寄主阶段的寄生，寄生蜂成虫仅从4龄开始羽化。当同时选择所有龄期时，双斑叶蝉降低了1龄和2龄的寄生率(分别为3.73%和4.76%)，而增加了3龄和4龄的寄生率(分别为5.44%和6.93%)。SP.天然橡胶。2龄和3龄若虫的寄生率分别为1.27%和3.17%，1龄和4龄若虫的寄生率分别为7.0%和3.06%。寄主植物对两种寄生蜂的龄期选择性均无显著影响。寄生1龄时，两种寄生蜂从卵到成虫羽化的发育历期最长，选择4龄时发育时间最短。无毛植株上的寄生蜂发育时间一般比多毛植株上的短。
Abstract The host instar preferences of Encarsia bimaculata and Eretmocerus sp. nr. furuhashii parasitizing Bemisia tabaci and their development on four host plants, collard, eggplant, cucumber and tomato, were studied in the laboratory. Both of the parasitoids accepted all nymphal stages of B. tabaci, but E. bimaculata preferred third and fourth instars while Er. sp. nr. furuhashii preferred second and third instars under both choice and no choice conditions. Regardless of host stage parasitized, adults of parasitoids emerged only from fourth instars. When given the simultaneous choice of all instars, E. bimaculata reduced parasitization of first and second instars (3.73 and 4.76%, respectively) while increasing parasitization of third and fourth instars (5.44 and 6.93%, respectively), in contrast Er. sp. nr. furuhashii increased its parasitization of second and third instar nymphs (1.27 and 3.17%, respectively) and decreased that of first and fourth instars (7.0 and 3.06%, respectively). Host plants did not significantly influence instar preference for either parasitoid. Developmental periods of both the parasitoids from egg to adult emergence were longest when first instars were parasitized and shortest when fourth instars were selected. Parasitoid developmental time was generally shorter on glabrous plants than on hirsute plants.