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A preliminary study on the biology and control of the geometrid euctenurapteryx nigrociliaria



A preliminary study on the biology and control of the geometrid euctenurapteryx nigrociliaria



Acta Entomologica Sinica 19(3): 318-324



The geometrid E. nigrociliaria Leech is a serious pest of plum yews [Cephalotaxus harringtonia var. sinensis, C. fortunei, C. harringtonia f. fastigiata]. In Lu-shan [China] it has a single generation per year and overwinters in the egg stage. The ova are deposited on the under surface of the yew leaves, in the crevices of barks and on weeds, and hatch in later March of the next year. The damage on the foliage increases as the larvae grow. The larvae are gregarious and consume only the epidermal layer of the leaves before the 3rd instar, but become dispersed and gnaw off the whole leaf or even the bark after the 3rd instar. Chemical control must be conducted when the larvae are young. Chemical and other measures of control were tested and discussed.

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Accession: 004611045

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