Effect of temperature and host stage on performance of Aphelinus varipes Förster (Hym., Aphelinidae) parasitizing the cotton aphid, Aphis gossypii Glover (Hom., Aphididae)

Abstract

Development time, mummification, pupal mortality, host feeding and sex ratio of a Norwegian strain of Aphelinus varipes Förster parasitizing the cotton aphid, Aphis gossypii Glover were studied at 20, 25 and 30°C in controlled climate cabinets. Petri dishes with cucumber (Cucumis sativus L) leaves on agar were used as experimental units. Cotton aphids in different larval instars and as adults, reared at the three different temperatures, were presented to A. varipes in a `no‐choice' situation for 6 h. These presentations were done at 25°C in each experiment to avoid an influence of temperature on parasitization rate. More first instar aphids were parasitized than third and fourth instars among the aphids reared at 20°C. Pupal mortality of the parasitoid was not influenced by temperature. It was lower in aphids parasitized as adults than in aphids parasitized in second instar. The sex ratio of A. varipes was female‐biased, and varied between 92% females developed from aphids reared at 25°C and 70% from aphids reared at 20°C. The sex ratio was not significantly influenced by host stage. The development time of A. varipes ranged from 17.5 days at 20°C to 9.8 days at 30°C.

Manipulation of parasitoid size using the temperature-size rule: fitness consequences

“…Other researchers have reported similar results in a favourable temperature range (i.e. without extreme conditions) (Deng and Tsai 1998;Röhne 2002;De Vis et al 2002;Ichiki et al 2003).…”

Effect of temperature on biology and population growth parameters ofAphis gossypiiGlover (Hom., Aphididae) on greenhouse cucumber

“…Therefore, although A. gossypii is known as a polyphagous species, it seems widely accepted in the literature that its performance varies widely among different host plants (Kersting et al. 1999; Perng 2002; Rohne 2002; Du et al. 2004; Chau et al.…”

The Effect of Temperatures on the Biological Characteristics of Two Aphid Parasitoids Aphelinus asychis (Walker) and Aphelinus varipes (Förster) (Hymenoptera: Aphelinidae) on Two Aphid Hosts

“…진딧물 방제에 있어 농약의 저항성 및 교차저항성의 발달 (Song et al, 1993;Song and Motoyama, 1996;Choi et al, 2001;Seo et al, 2008 and (Elliott et al, 1999), 기주곤충에 따른 생물학적 특성 조사를 통한 방제인자로서의 가능성 탐색 (Tatsumi and Takada, 2005a), 기능반응연구 (Byeon et al, 2011), 콩진딧물(Acyrthosiphon pisum)의 발육단계가 진디면충좀벌의 산란능력에 미치는 영향 (Gerling et al, 1990), 기주, 식물, 기주-식물의 상호작용으로 발생되는 화학물질에 대한 진디면충좀벌의 반응 (Rao et al, 1999), 진디면충좀벌 성충의 휴면에 미치는 광주기, 온도의 영 향 (Tatsumi and Takada, 2005b (Borgemeister and Poehling, 1988;Höller, 1989;Höller et al, 1993;Weniger, 1994), 목화면충좀 벌에 대한 연구는 형태학적 특성 (Weniger, 1994), 계통별 분자 생물학적 특성 조사 (Strong, 1993 (Force and Messenger, 1964;Tang and Yokomi, 1995;Rӧhne, 2002) 나타났을 가능성이 있는 것으로 생각된다.…”