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7672302 
Journal Article 
Control of Plant Diseases by Extracts of Inula viscosa 
Wang, W; Ben-Daniel, BH; Cohen, Y 
2004 
1 
Phytopathology
ISSN: 0031-949X
EISSN: 1943-7684 
American Phytopathological Society 
94 
10 
1042-1047 
English 
18943791 
WOS:000224069000002 
ABSTRACT Leaves of Inula viscosa were collected from the field, dried, and extracted with a mixture of acetone and n-hexane. The oily, water-insoluble pastes obtained after evaporation of the solvents were used for the control of foliar diseases in growth chambers. The pastes, either dissolved in acetone or emulsified in water, effectively controlled downy mildew of cucumber, late blight of potato or tomato, powdery mildew of wheat, and rust of sunflower. Mean effective dose (concentration) required for 90% inhibition of disease values for acetone solutions and water emulsions ranged from 0.68 to 1.02% and 0.65 to 1.00% (wt/vol), respectively. Dry matter content in fresh leaves, paste-extract yield in dry leaves, and disease control efficacy of paste extracts were similar in leaves of I. viscosa collected during May to October, suggesting that, for practical use, harvests can be conducted during most of the growing season. The results show that I. viscosa may be used as an herbal source for fungicidal preparations against foliar diseases caused by pathogens belonging to the families Oomycetes, Ascomycetes, and Basidiomycetes. 
Blumeria graminis f. sp. tritici; Herbal extracts; Phytophthora infestans; Pseudoperonospora cubensis; Puccinia helianthi