Rajani Ahluwalia

Abstract

Phalantha phalantha Drury is an orange colour butterfly with spotted wings. It starts emerging in the month of May and oviposits eggs on the leaves and green twigs. It has five larval instars with total larval period of 21-28 days. Fourth and the fifth larval instars are most harmful stages in which larvae feed voraciously and eat every part of the leaf. It completes its life cycle in 32-42 days in rainy season and completes 7-9 overlapping generations each year. June-August is the most active period of the pest and its population starts decliningfrom October end onwards.

Keywords

Phalantha phalantha, Instars, Population, Life Cycle, Generations

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Rajani Ahluwalia

Abstract

All the five larval stages of Clostera cupreata were fed and grown on the leaves of poplar and their energy budget was drawn. A linear increase in assimilation, consumption and tissue growth was found but an irregular trend of egestion in developing instars was observed.

Keywords

Consumption, Assimilation, Biomass, Egestion

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