Journal Article

Evaluation of various plant extracts against the early blight disease of tomato plants under greenhouse and field conditions

Nashwa, S.M.A., Assuit Univ. (Egypt). Plant Pathology Dept, Abo-Elyousr, K.A.M., Assuit Univ. (Egypt). Plant Pathology Dept

2012

Overview

The antimicrobial activity of six plant extracts from Ocimum basilicum, Azadirachta indica, Eucalyptus chamadulonsis, Datura stramonium, Nerium oleander, and Allium sativum was tested for controlling Alternaria solani in vitro and in vivo. In in vitro study the leaf extracts of D. stramonium, A. indica, and A. sativum at 5% concentration caused the highest reduction of mycelial growth of A. solani (44.4, 43.3 and 42.2%, respectively), while O. basilicum at 1% and 5% concentration and N. oleander at 5% concentration caused the lowest inhibition of mycelial growth of the pathogen. In greenhouse experiments the highest reduction of disease severity was achieved by the extracts of A. sativum at 5% concentration and D. stramonium at 1% and 5% concentration. The greatest reduction of disease severity was achieved by A. sativum at 5% concentration and the smallest reduction was obtained when tomato plants were treated with O. basilicum at 1% and 5% concentration (46.1 and 45.2 %, respectively). D. stramonium and A. sativum at 5% concentration increased the fruit yield by 76.2% and 66.7% compared to the infected control. All treatments with plant extracts significantly reduced the early blight disease as well as increased the yield of tomato compared to the infected control under field conditions.

• Publisher: Czech Academy of Agricultural Sciences (CAAS),Czech Academy of Agricultural Sciences
• Subject: AGENT PATHOGENE / ALLIUM SATIVUM / ALTERNARIA SOLANI / Antiinfectives and antibacterials / Antimicrobial activity / antimicrobial properties / AZADIRACHTA INDICA / basil / BLIGHT / CONTROL DE ENFERMEDADES / CONTROLE DE MALADIES / CRECIMIENTO / CROISSANCE / CROP YIELD / DATURA STRAMONIUM / DEPERISSEMENT / DISEASE CONTROL / disease severity / Early blight / ENFERMEDADES DE LAS PLANTAS / EUCALYPTUS / Eucalyptus camaldulensis / EXPERIMENTACION IN VITRO / EXPERIMENTACION IN VIVO / EXPERIMENTATION IN VITRO / EXPERIMENTATION IN VIVO / EXTRACTOS VEGETALES / EXTRAIT D'ORIGINE VEGETALE / fruit yield / garlic / Greenhouses / GROWTH / http://www.fao.org/aos/agrovoc#c_10176 / http://www.fao.org/aos/agrovoc#c_15749 / http://www.fao.org/aos/agrovoc#c_16131 / http://www.fao.org/aos/agrovoc#c_16132 / http://www.fao.org/aos/agrovoc#c_2327 / http://www.fao.org/aos/agrovoc#c_26468 / http://www.fao.org/aos/agrovoc#c_2683 / http://www.fao.org/aos/agrovoc#c_28427 / http://www.fao.org/aos/agrovoc#c_290 / http://www.fao.org/aos/agrovoc#c_33603 / http://www.fao.org/aos/agrovoc#c_3394 / http://www.fao.org/aos/agrovoc#c_4475 / http://www.fao.org/aos/agrovoc#c_5017 / http://www.fao.org/aos/agrovoc#c_5136 / http://www.fao.org/aos/agrovoc#c_5305 / http://www.fao.org/aos/agrovoc#c_5629 / http://www.fao.org/aos/agrovoc#c_5630 / http://www.fao.org/aos/agrovoc#c_5962 / http://www.fao.org/aos/agrovoc#c_5978 / http://www.fao.org/aos/agrovoc#c_7805 / http://www.fao.org/aos/agrovoc#c_8166 / http://www.fao.org/aos/agrovoc#c_957 / IN VITRO EXPERIMENTATION / IN VIVO EXPERIMENTATION / In vivo methods and tests / INHIBICION / INHIBITION / jimsonweed / leaves / LYCOPERSICON ESCULENTUM / MALADIE DES PLANTES / MICELIO / Mycelia / MYCELIUM / Neem / NERIUM OLEANDER / OCIMUM BASILICUM / oleander / ORGANISMOS PATOGENOS / PATHOGENICITY / PATHOGENS / PATOGENICIDAD / PLANT DISEASES / PLANT EXTRACTS / PLANT PROTECTION / POUVOIR PATHOGENE / PROTECCION DE LAS PLANTAS / PROTECTION DES PLANTES / Reduction / RENDEMENT DES CULTURES / RENDIMIENTO DE CULTIVOS / sweat / sweat basil / TIZON / TOMATE / TOMATOES