Die invloed van temperatuur op die ontwikkeling en reproduksie van die valskodlingmot-eierparasitoïed, Trichogrammatoidea cryptophlebiae Nagaraja (Hymenoptera: Trichogrammatidae)

[摘要] ENGLISH ABSTRACT:The development time, survival and fecundity of Trichogrammatoidea cryptophlebiaeNagaraj a, an egg parasitoid of false codling moth, Cryptophlebia leucotreta Meyr., on .citrus were determined at 15,20,25 and 30°C. Using these values the intrinsic rate ofincrease (rm), mean generation time (T) and net replacement rate (Ra) were estimatedat the respective temperatures. In addition, the data were used to estimate theminimum temperature required for development. The rmincreased from 15 (0,042) to20°C (0,088) and then gradually decreased from 25 (0,069) to 30°C (0,012). The Rawas highest at 20°C (3,116 females/female), followed by 15°C (2,607females/female), 25°C (1,894 females/female) and 30°C (1,092 females/female). Tdecreased as temperature increased from 7 days at 30°C to 22,79 days at 15°C. Theestimated minimum temperature for development was 7,65°C which implies that thiswasp should be able to survive and reproduce under normal winter conditions in theWestern Cape.

[发布机构] Stellenbosch University