Eur. J. Entomol. 102 (3): 449-452, 2005 | DOI: 10.14411/eje.2005.064
The effects of six species of aphids on some life history parameters of the ladybird Propylea quatuordecimpunctata (Coleoptera: Coccinellidae)
- 1 Institute of Zoology, Bulgarian Academy of Sciences, Blvd. Tsar Osvoboditel 1, 1000 Sofia, Bulgaria; e-mail: plamenkalushkov@yahoo.com
- 2 Institute of Entomology, Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic; e-mail: hodek@entu.cas.cz
One of the factors affecting the effectiveness of predatory coccinellids in an aphid infested crop is the food specificity of the predator. The response towards six species of aphids (Sternorrhyncha: Aphididae) was therefore tested in one of the most abundant aphidophagous coccinellids in Bulgaria - Propylea quatuordecimpunctata (L.) (Coleoptera: Coccinellidae). All aphid species studied (Acyrthosiphon pisum Harris, Aphis craccivora Koch, Eucallipterus tiliae (L.), Euceraphis betulae (L.), Phorodon humuli (Schrank) and Myzus persicae (Sulzer) cultured on transgenic Bt and conventional (non-Bt) potatoes were suitable food according to the rate of larval development, larval mortality and adult fresh weight. Females of P. quatuordecimpunctata fed with M. persicae cultured on Bt potato, or on non-Bt potato or on a mixture of M. persicae from Bt potatoes and A. craccivora, laid a little more eggs than those fed only with A. craccivora.
Keywords: Coccinellidae, essential prey, alternative prey, larval development, larval mortality, fecundity, longevity, adult fresh weight
Received: September 27, 2004; Revised: February 14, 2005; Accepted: February 14, 2005; Published: August 15, 2005 Show citation
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