The Effect of Some Crude Plant Extracts Antimycotics Growth of the Hyphae of Ascosphaera apis, the Agent Causing chalkbrood Disease in Apis millifera

Abstract

Studies on the effect of the crude extracts with 95 percent ethyl alcohol from the dried ground young leaves of Piper betle, Pterocarpus indicus, Lagerstroemia florilrinda, Arachis hypogaea, Tomarindus indica, Sesbania roseberghii, Acacia famesiana, Clitoria ternatea, Typha angustifolia, Acanthus ilicifolius Rhinacanthus nasutus, Eupatorium odoratum, and from theroot of Angiopteris evecta to the growth of the hyphae of Ascosphaera apis, the agent causing chalkbrood disease in Apir milliferea found that the crude extracts at the concentrations of 1, 3, 4, 5 and 7 ug/filter paper disc of 0.6 cm in diamter could significantly (p < 0.01) retard the growth of fungal hyphae much better than the control groups. Generally, the crude extracts at the higher concentrations could retard the growth of hyphae much better than those at the lower concentrations. The most interesting crude extract was from P. betle following with A. ilicifolius, E. odoratum, R. nasutus, T. angustifilia, P. indicus, and A. evecta. The effect of crude extracts from P. betle and A. ilicifolius retarded the growth of fungal hyphae approximately 10 days E. odoratum, L. florilrinda, S. roseberghii, P. indicus, A. famesiana and R. nasutus could retard the growth of hyphae better than the control groups. Similarly, at the higher concentrations of the antimycotics could retard the growth of fungal hyphae better and longer than those of the lower concentrations.