EFFICACY OF THREE SELECTED BOTANICALS IN THE CONTROL OF CINEREA ASSOCIATED WITH DAMPING OFF IN CITRULLUS LANATUS (THUNB.) MATSUM AND NAKAI.
ADEBOLA, M. O., BELLO, T. S., YUSUF, H. AND EGUBAGI, J. M.
ABSTRACT
The use of plant extracts in controlling plant diseases has witnessed appreciable success; such was exploited in this study when efficacy of extracts from Azadirachta indica, Calotropis procera and Anacardium occidentale, each at different concentrations; 30 mg ml-1, 60 mg ml-1, 90 mg ml-1 and 0 mg ml-1 (Control), were examined in vitro to control Botrytis cinerea that causes damping off disease of Citrullus lanatus var. ‘lanatus’. Result showed that the mean inhibition in colony diameter at 90 mg ml-1
ranged from 0.26-2.26 (A. indica), 0.43-3.30 (C. procera) and 0.13-2.50 (A. occidentale) compared respectively to 0.5-4.36, 0.57-4.33 and 0.43-4.10 in their 0 mg ml-1 concentration. The 90 mg ml-1 concentration that has the least fungaly..