The life table statistics of six native Kenyan species/strains of Trichogramma and Trichogrammatoidea were established using a factitious host Corcyra cephalonica, Stainton (Lepidoptera: Pyralidae), at eight different temperatures (10, 15, 20, 25, 28, 30, 32 and 35 degrees C) and two humidity levels (40-50 and 70-80%). The objective was to select insects with superior attributes for augmentativ...

Zinc salts fed at relatively high concentrations in the diet have been known to produce deleterious effects. Sutton & Nelson (1938) found that 1 % of zinc as carbonate impaired the growth and general health of rats. Smith & Larson (1946) were, however, the first to study extensively this phenomenon in rats. They established that this condition manifested itself in the following two distinct and...

Trichogramma ostriniae Pang and Chen (Hymenoptera: Trichogrammatidae) was reared continuously for seven generations on its native host, the Asian corn borer,Ostrinia furnacalis (Guenée) (Lepidoptera: Crambidae). It took 6.7 d at 33 C and 20 d at 17 C from oviposition to adult emergence with no differences between sexes. Several theoretic models were used to Þt the temperature-dependent growth c...

We conducted an experiment in Niger to evaluate the performance of hermetic triple layer (Purdue Improved Crop Storage- PICS) bags for the preservation of shelled and unshelled groundnut Arachis hypogaea L. Naturally-infested groundnut was stored in PICS bags and woven bags for 6.7 months. After storage, the average oxygen level in the PICS bags fell from 21% to 18% (v/v) and 21%-15% (v/v) for ...