Species in Trichogramma parasitoid of Alabama argillacea. II. Fertility life table and parasitism of three strains of Trichogramma sp.

Abstract

The fertility life table and parasitism of Trichogramma sp. (Piracicaba strain) and Trichogramma pretiosum Riley, 1879 (Iguana and Goiânia strains) (Hym.: Trichogrammatidae), egg parasitoid of Alabama argillacea (Hübner, 1818) (Lep.: Noctuidae), reared on Anagasta Kuehniella (Zeiler, 1879) (Lep.: Pyralidae) were studied at 25 ºC. The number of eggs parasitized per female was 102.31 for Iguana strain, 95.52 for Goiânia and 75.59 for Piracicaba ones. The linear regression model which best represented the mean accumulated parasitism in function of longevity for the three strains was 1/y = a + b/x. Based on the finite rate of increase (x) and on the net reproduction rate (Ro), the Iguatu strain was superior to the others.