Biology and natural enemies of spotted ash looper , Abraxas pantaria ( Lepidoptera , Geometridae ) in Krka

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Published 2013 in Unknown venue

ABSTRACT

Background and Purpose: Spotted ash looper (Abraxas pantaria) is a forest present in Krka National Park, Croatia with occasional mass occurrence. The caterpillars of this pest have completely defoliated leaves of Narrow-leafed ash (Fraxinus angustifolia) in the upper flow of river Krka in the period from 2008–2010. We have researched the biology of spotted ash looper which is first comprehensive study of this pest in Croatia. Materials and Methods: The research of spotted ash looper included field trials through all the years and laboratory experiments. Caterpillars were reared and daily weighted in laboratory. Fresh and dry Narrow-leafed ash leaves have been weighted and factor of dry matter in leaves defined. For each individual sex, moment of onset of particular larval instar, prepupa, pupa and butterfly was noted in order to identify the duration of each stage and possible differences. Duration of larval stages and consummation of food were analysed separately by gender. A total of 200 pupae of spotted ash looper were transferred to the laboratory for the identification of natural enemies. Each pupa was placed in a separate glass tube and incubated in labo-

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    2013

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    Semantic Scholar

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