Abstract
AbstractPopulation biology of Biprorulus bibax Breddin on citrus was studied during December 1987—June 1988 in southern New South Wales. In 2 lemon groves peak populations of up to 11,670 adult bugs in late January and late March were estimated by the mark, release and recapture method. Large populations of nymphs matured in December/January and March/April. During autumn, adult bugs entered reproductive dormancy and moved to overwintering sites in adjacent Valencia orange trees. Adults were long lived as many marked in the previous summer were recaptured in spring and summer 1988/89. Maximum recorded longevity was 419 days. Intra and inter‐grove movement was observed with bugs found up to 2 km away from site of marking. Parasitism of B. bibax eggs by 3 species of hymenopteran parasitoids was generally low and appeared to have little effect on population regulation, except for a brief period in midsummer.
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