IN VIVO ANTAGONISTIC CAPABILITIES OF VARIOUS Bacillus subtilis AND Streptomyces SPP. FORMULATIONS AGAINST Acremonium strictum.

Document Type : Original Article

Authors

1 Agricultural Microbiology Department. Faculty of Agriculture Cairo University, Gíza.

2 Maize, Sugar and Forage Crops Disease Research Department, Plant Patholology Research Institute, Agricultural Research Center, Giza.

Abstract

Greenhouse and field experiments were conducted to identify the most
effective and applicable formulation of B. subtils and Sterptomyces sp. either singly or
in combination for controUing Acremonium wilt ¡n sorghum cv. Giza 113 .The single
and combined (1:1) inocula of B. subtilis (isolate No. 9), Streptomyces sp. (isolate No.
3) as wefl as the fungicide Occidor Plus (carbendazim 50 % S.C.) significantly
(p < O.05) reduced Acremonium wilt incidence ¡n grain sorghum plants grown in pots.
The tested can ters i.e., vermiculite, peat-moss, kaolinite, bentonite, wheat bran and
talc powder favoured the antagonistic capabilities of single and combined inocula
bioagents. Data of the field experiment showed no significant difference between a
combination of the two bioagents and the fungicide with respect to average
percentage of infechon and average grain yield. Vermiculite-entrapped cells were
superior in reducing infection tol9.83 % and increasing grain yield to 127.6 g.plant1
compared to 25.75 % and 113.0 g.planí1 for control, respectively.The data suggested
the use of a combined inoculum cf the examined boagents entrapped on vermiculite
for control of Acrernonium wilt in grain sorghum plants.

Keywords

Journal of Plant Production
Volume 30, Issue 2
February 2005
Pages 851-859

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