Downy mildew of maize caused by
was significantly controlled by seed treatment and foliar sprays of a talc-based formulation of a
strain under greenhouse and field conditions. Leaf extracts of
were found to be equally effective as
in controlling maize downy mildew, although the extracts were not as effective at inhibiting conidial germination as the pseudomonad or as metalaxyl. These treatments also suppressed sporulation of
on diseased foliage. Enhanced induction of defense enzymes, chitinase and β-1,3-glucanase appeared to be associated with control mechanism and metalaxyl did not show such induction. The reduction in disease incidence under field condition resulted in increased yield. The inhibitory effect of
and extracts of
make them potential alternatives to metalaxyl for control of maize downy mildew, although their efficacy, practical application and cost needs to be explored in greater detail before they can be incorporated into an integrated pest management programme.
Authors:A. Taczman-Brückner, Cs. Mohácsi-Farkas, Cs. Balla, and G. Kiskó
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Authors:S. Naeimi, S. Khodaparast, M. Javan-Nikkhah, C. Vágvölgyi, and L. Kredics
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