Use of Solid-State Fermentation on Selected Agricultural wastes for Mass Production of Beauveria bassiana

Abstract

Two isolates of Beauveria bassiana were grown on different agricultural waste
mediums to evaluate their conidia production potential under Solid State
Fermentation (SSF). Coffee husk, wheat bran, tea and vegetable wastes were
used as substrates. Among the substrates, vegetable wastes best favored to isolate
II (AUBI2) for 5.77±l .53 (1 0 ) , conidia/gram yield. Whereas, the highest conidia
count record 6.34 ± 2.27 (107) conidia/gram o f AUBil was obtained at 60%
moisture content on wheat bran. All substrates supported maximum conidia yield
at 30°c . At pH 3.5 AUBII produced 11.63 ± 8.34 ( I 0 7) conidia/gram on coffee
husk but the high conidia yielding substrates were best favored at their natural
PH values. Vegetable wastes supported AUB11. AUBI2, to produce high conidia
yield o f 4.31 ± 1.18 (10 7), 5.07 ± 0.76 (107) conidia/gram o f substrate at 21 days
incubation period respectively. The optimum incubation period on wheat bran
was 4 weeks under sufficient exposure to light. Successful biological control
depends on cheap availability o f the agent. Therefore, large scale industrial
production on vegetable w'aste and wheat bran can be the plausible solution