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Variation in Sensitivity to Fungicides among Isolates of Alternaria solani Causing Tomato Leaf Blight Disease
, K. Seetharaman, R. Nandakumar, I. Johnson
Published in
2001
Volume: 36
   
Issue: 3-4
Pages: 251 - 258
Abstract
Isolates of Alternaria solani causing tomato leaf blight disease were collected from twenty conventional tomato growing regions and their pathogenicity established. A wide variation existed among the isolates in terms of virulence on tomato plants. Sensitivity of the isolates to different fungicides was evaluated based on mycelial growth on fungicide-amended culture media and spore germination after fungicide treatment. All the chemicals tested were effective in reducing the mycelial growth and spore germination of A. solani isolates however, mancozeb (0.2%) followed by captofol (0.2%) were more effective. Virulent isolate recorded more mycelial growth and spore germination. A positive correlation was found between the virulence of isolates and ability to grow and sporulate after exposure to fungicides.
About the journal
JournalActa Phytopathologica et Entomologica Hungarica
ISSN02381249