A Preliminary Study on the Bionomics and Application of Sycanus croceovittatus (Hemiptera, Reduviidae)

This paper reports the results of the study on the bionomics and application of Sycanus croceovittatus Dohrn in 1982~1984.It is an important predator of the larvae of some forest pests. In the insectary it has two generations each year in Guangzhou, Guangdong Province. The first generation occurs from early May to late October, the second generation from middle August to middle June of the following year. Winter is passed as 4~5 instar nymphs beneath stones and other objects in grassy plots. The eggs hatch 12.5~16.5 days after oviposition. The nymph has five instars, and its development lasts 48.0~223.5 days. The adults can live for 3.0~87.5 days. The preoviposition period is 16.5~38.0 days.The voracities of the nymphs and adults were tested with Dendrolimus punctatus Walker, Latoia lepida (Cramer), Scopelodes contracta Walker, Artona funeralis Butler and Selepa celtis Moore in different stages.Indoor and outdoor experiments indicated that it is effective for the control of some forest insect pests.