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Thai National AGRIS Centre was established in March 13, 1980 by General National FAO Committee, Ministry of Agriculture and Cooperatives cooperated with Food and Agriculture Organization of the United Nations. Collects information related to agricultural sciences and technologies produced/printed in Thailand including those of agricultural information about Thailand produced/printed in abroad Technical management of agricultural information system: indexing, cataloging, creating Thai Agricultural Database Care and preservation of valuable agric [...]


Written Paper

Biology, mass rearing, host plant range and natural enemies of the rice greenhorned caterpillar (Melanitis leda ismene Cramer) and the rice skipper (Pelopidas mathias Fabricius)  [1990]

Vichien Bumroongsri; Kasetsart Univ., Bangkok (Thailand). Graduate School [Corporate Author]

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Pupal stage lasted 8.7+-0.2 and 9.1+-0.1 days, respectively. The longevity of male and female adults of M. leda ismene was 13.2+-0.1 and 13.2+-1.2 days, while for P. mathias it was 4.4+-0.5 days for both male and female. The total life cycle of M. leda ismene from egg to adult emergence was long on rice with an average 32.8+-0.2 days and of P. mathias the average was 34.7+-0.3 days. There was no significant difference in various oviposition cage sizes for the adults of M. leda ismene and P. mathias which required a large cage as well as good ventilation to support their nuptial flight. The time of oviposition of both adult female butterflies was in the morning (06:00 - 09:00). Honey solution was found to provide greater longevity and fecundity. Twenty out of fourty-two weed species, and twenty-four out of thirty-one weed species were observed as the potential host plants of M. leda ismene and P. mathias, respectively. The effect of rice plant age were tested on oviposition preference and larval development for M. leda ismene. The adult female butterfly preferred to oviposit on the vegetative stage (5-6 WAT). While the leaves of the seedling and vegetative stage provided a better substrate for larval development, all ages of the rice plant could support normal growth and development of M. leda ismene. Observations for natural enemies of the rice greenhorned caterpillar and the rice skipper revealed the pathogens.....Bacillus thuringiensis Berliner and a nuc
lear polyhedrosis virus (NPV).....infecting larval and pupal stages of both insect pests.