n African Entomology - Life table study of Anagyrus sp. nr. pseudococci (Girault) (Hymenoptera: Encyrtidae) on its host, Planococcus ficus (Signoret) (Hemiptera: Pseudococcidae)
|Article Title||Life table study of Anagyrus sp. nr. pseudococci (Girault) (Hymenoptera: Encyrtidae) on its host, Planococcus ficus (Signoret) (Hemiptera: Pseudococcidae)|
|© Publisher:||Entomological Society of South Africa (ESSA)|
|Affiliations||1 Stellenbosch University and 2 Stellenbosch University|
|Publication Date||Jul 2014|
|Pages||250 - 256|
|Keyword(s)||Anagyrus sp. nr. pseudococci, Augmentative release, Biological control, Encyrtidae, Intrinsic rate of increase, Life table analysis, Net reproduction rate, Parasitoid, Species identity and Vineyards|
Anagyrus spp. are well-known primary parasitoids of Pseudococcidae employed in augmentative release programmes. Anagyrus sp. nr. pseudococci was found to be the dominant Anagyrus sp. present in vineyards around the Stellenbosch area, during scouting in 2006 and 2007. Given the lack of sufficient life table data on this species, a life table study was conducted at constant temperatures, 11, 17, 22, 27, 30, 32 and 34 °C, at a humidity of approximately 53 % and daylight regime of 16L:8D. The maximum values for the intrinsic rates of increase and net reproduction rate were 4.305 and 152.7, respectively, and were obtained at 27 °C. The lower temperature threshold (T0), upper lethal limit (TL) and optimum temperature threshold (Topt), were estimated at 16.32 °C, 35.66 °C and 30.75 °C, respectively. Given these developmental parameters, A. sp. nr. pseudococci is well adapted to outperform its host, Planococcus ficus, at higher temperatures.
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