SELECTION OF NOSEMA-PYRAUSTA (MICROSPORIDIA, NOSEMATIDAE)-INFECTED OSTRINIA-NUBILALIS (LEPIDOPTERA, PYRALIDAE) EGGS FOR PARASITIZATION BY TRICHOGRAMMA-NUBILALE (HYMENOPTERA, TRICHOGRAMMATIDAE)
Mme. Saleh et al., SELECTION OF NOSEMA-PYRAUSTA (MICROSPORIDIA, NOSEMATIDAE)-INFECTED OSTRINIA-NUBILALIS (LEPIDOPTERA, PYRALIDAE) EGGS FOR PARASITIZATION BY TRICHOGRAMMA-NUBILALE (HYMENOPTERA, TRICHOGRAMMATIDAE), Crop protection, 14(4), 1995, pp. 327-330
Trichogramma nubilale Ertie and Davis females were offered a choice be
tween egg masses of the European corn borer, Ostrinia nubilalis (Hubne
r), infected with the microsporidium Nosema pyrausta (Paillot) and non
-infected egg masses. Nosema pyrausta-infected O. nubilalis eggs were
smaller (weight) than non-infected host eggs. Trichogramma nubilale fe
males did not discriminate between infected and N. pyrausta-free egg m
asses. This microsporidian infection did not significantly affect the
sex ratio of emerging wasps. Significantly fewer and smaller adult par
asitoids emerged from infected host eggs than from noninfected eggs.