The antagonistic fungus, Chaetomium brasiliense was tested to control Phytophthora
palmivora causing rot disease of Durian (Durio zibithenus L.) var Montong by crude extracts
and Nano-particles derived from Ch. brasiliense. Crude extracts of antagonistic fungus was
tested for antifungal biological activities. The crude extracts from antagonistic fungus with
hexane, ethyl acetate and methanol were tested against P. palmivora. Crude ethyl acetate from
Ch. brasiliense gave significantly against P. palmivora which the ED50 values was 17.46 μg/ml.
Testing Nano-particles were tested for antifungal activities. The results showed nano - particles
from Ch. brasiliense gave effectively significantly inhibition of colony growth and spore
production which the ED50 values were 1.08 μg/ml, and 8.68 μg/ml respectively. Application of
Nano - particles to control the P. palmivora causing root rot disease of durian in pot experiment
was successfully done. The results showed nano-particles from Ch. brasiliense reduced the root
rot disease on durain of 40%. The nano–particles from Ch. brasilense gave significiantly high
plant growth which were 79.5 cm when compared to the non-trated control.
Keywords
Nano-particles, Chaetomium brasiliense, Phytophthora palmivora, biological control
INTERNATIONAL JOURNAL OF AGRICULTURAL TECHNOLOGY
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