Efficacy of botanicals against Alternaria blight (Alternaria brassicae) of mustard
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Authors
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C.S. PATNI, S.J. KOLTE* and R.P. AWASTHI
Keywords:
Alternaria brassicae, mustard, botanicals, blightAbstract
Methanol extract of six medicinal plants were evaluated against Alternaria blight of mustard. Eucalyptus, Ashok and Calotropis extracts, in that order, were promising in limiting the growth and sporulation of the pathogen, whereas Parthenium extracts promoted these. Spray of Trichoderma harzianum and Pseudomonas fluorescens, known to be generally effective in the management of the disease, and mancozeb, were included for comparison in the field evaluation of plant extracts. The disease was adequately managed by the Eucalyptus, Ashok and Calotropis. Yield of mustard seeds was significantly highest in Eucalyptus spray over all the other treatments at 12.02 q/ha. The check had only 7.35 q/ha yield. Ashok and Calotropis sprays also provided better control and were comparable to mancozeb sprays. Yield in the case of Eucalyptus spray was higher than the standard check mancozeb in two crop seasons indicating its role in giving consistently stable control of Alternaria blight resulting in superior performance in yield.
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