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In vivo antifungal activity of neem oil and aqueous extracts against leaf spot disease caused by <i>Cercospora abelmoschii</i> on okra


Aricléia De Moraes Catarino
Antonia Alice Costa Rodrigues
João Victor Jansen De Queiroz
Luciano Marinho Furtado
Leilson Lopes Santos Silva Silva

Abstract

The cercospora leaf spot, caused by Cercospora abelmoschi Ellis and Everhart, is quite common in okra  culture. Therefore, this study aimed to evaluate the efficiency of aqueous extracts of neem (Azadirachta indica A. Juss), citronella (Cymbopogon nardus (L.) Rendle), eucalyptus (Eucalyptus grandis L.), ecolife®, A. indica oil and fungicide cercobin 700 PM® in control of cercospora leaf spot on okra in greenhouse. The extracts and neem oil were tested in concentration 10%, the fungicide cercobin 700PM® in dose 2.5 g.l-1, applied 10 days after pathogen inoculation by leaf spray and the citric biomass extract ecolife® in concentration 5.0 ml.l-1, applied 10 days before pathogen inoculation. All treatments, except ecolife®, were effective in controlling cercospora leaf spot and may be recommended as alternatives in agroecological systems. © JASEM

Keywords: Abelmoschus esculentus, aqueous extracts, Cercospora abelmoschi, fungicide cercobin and
greenhouse.


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eISSN: 2659-1499
print ISSN: 2659-1502