The effects of Allothrombium ovatum larvae on adult aphids (alatae) of Rhopalosiphum padi at different mite: aphid ratios were studied in the laboratory. Parasitized R. padi alatae had reduced survival time, reproductive time and number of offspring, with the maximum reduction being 44%, 70% and 72%, respectively. The results showed that more than three mites per R. padi adult caused the greatest reduction in the survival and reproductive rates of parasitized aphids.
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Vol. 6 • No. 1