oa Journal of the Entomological Society of Southern Africa - A laboratory rearing technique for black maize beetles, Heteronychus spp. (Coleoptera: Scarabaeidae), and notes on their life cycle
Heteronychus orator (F.) and H. tenuestriatus Fairmaire were reared in the laboratory at 25ï¿½C and 60-90% R.H. for one and two generations respectively. The adults were fed on potato tubers and the larvae on decaying organic matter in soil. The eggs hatched in about 14 days. The hatching rate was 56% for H. orator and 60% for H. tenuestriatus, and the larval survival rates were 33% and 31% respectively. The larval stages averaged 62 days and 67 days, the pupal survival rates were 75% and 77%, and the pupal stages averaged 74 days and 42 days, though one specimen of H. arator took 24:0 days to emerge.
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