Department of Plant Pathology, CSK HPKV, Palampur-176062
National Symposium on Strategic Issues in Plant Pathological Research held at Department of Plant Pathology, CSK HP Krishi Vishvavidayalaya, Palampur on November 24–25, 2011
Karnal bunt incited by Neovossia indica is one of the most important diseases of wheat crop. To develop an effective management practice, seven systemic fungicides (Tilt 25EC, Raxil 2DS, Contaf 25EC, Folicur 25EC, Baycor 25WP, Vitavax 75WP and Bavistin 50WP); four contact fungicides (Thiram 75DS, Captan 50WP, Kavach 75WP and Dithane M-45) and two coordinated fungicides (Moximate 72WP and F-100) were evaluated at different concentrations. All the systemic fungicides showed 100 per cent mycelial growth inhibition of test pathogen at 250 ppm concentration. While at 200 ppm, maximum inhibition was exhibited by Tilt (94.41%) followed by Raxil (94.28%) and Folicur (93.01%). Among non-systemic fungicides, Dithane M-45 gave maximum inhibition (92.11%) in mycelia growth of N. indica followed by Kavach (89.25%) and Captan (88.48%) at 2000 ppm whereas Moximate was found least effective. In case of teliospore germination complete inhibition were recorded in Tilt (100%) followed by Folicur (97.35%) and Raxil (95.41%) at 200 ppm. Dithane M-45 (non-systemic fungicides) resulted in 85.85% inhibition of spore germination. However, Kavach and Captan gave 77.30 and 67.28 per cent inhibition, respectively at 1000ppm concentration.
