INFLUENCE OF INSECTICIDES ON THE BIO-EFFICACY OF FUNGICIDES AGAINST CABBAGE LEAF SPOT WHEN APPLIED AS MIXTURES

H.B. PAVITHRA¹*, VEERESHKUMAR², S.C. TOPAGI³, C.T. ASHOK KUMAR^4
1Department of Agricultural Entomology, College of Agriculture, University of Agricultural Sciences, Ghandi Krishi Vignana Kendra, Bangalore, 560065, India
²Scientist, Centro Agro-Forestry Research Institute, Jhansi, U.P, India
³Department of Agricultural Entomology, College of Agriculture, University of Agricultural Sciences, Ghandi Krishi Vignana Kendra, Bangalore- 560065, India
⁴Department of Agricultural Entomology, College of Agriculture, University of Agricultural Sciences, Ghandi Krishi Vignana Kendra, Bangalore- 560065, India
* Corresponding Author : pavitrahbento@gmail.com

Received : 10-01-2016     Accepted : 28-01-2016     Published : 07-02-2016
Volume : 8     Issue : 3       Pages : 984 - 987
Int J Agr Sci 8.3 (2016):984-987

Keywords : Cabbage, Alternaria brassicae, Insecticides, Fungicides and compatibility
Academic Editor : Jeffrey M. Marcus, Dr Sharanabasappa, Yu-shin Nai
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Dr. Y M. Somshekar, Professor, Department of Plant Pathology, UAS, GKVK, Bangalore, for identifying the fungus.
Author Contribution : None declared

Among the insecticides studied, highest percent mycelial growth was inhibited by chlorfenapyr at all the four concentrations tested followed by chlorantraniliprole (18.5 SC) at 500 and 1000 ppm concentration, while, fenvalerate (20 EC) possess least fungicidal property with 54.13 to 58.38 per cent mycelial inhibition. The combining effect of difenoconazole (25 EC) with insecticides indicated that difenoconazole is compatible with diafenthiuron 50 WP (84.16 to 91.30 % mycelial inhibition), novaluron 10 EC (81.38 to 92.31% mycelial inhibition), emamectin benzoate 5 WG (82.22 to 89.04% mycelial inhibition), indoxacarb 15.8 EC (81.37 to 88.55 % mycelial inhibition), chlorantraniliprole 18.5 SC (82.28 to 88.37% mycelial inhibition) , fenvalerate 20 EC (81.83 to 88.12% mycelial inhibition), chlorfenapyr 10 SC (78.46 to 88.44% mycelial inhibition) flubendiamide 480 SC (81.45 to 87.06 % mycelia inhibition) and spinosad 45 SC (75.66 to 88.19 % inhibition). Regarding compatibility of mancozeb 75 WP with insecticides its bio-efficacy was enhanced with indoxacarb 15.8 EC (66.58 to 84.55% mycelial inhibition) at all concentrations followed by chlorfenapyr 10 SC (66.42 to 79.92% mycelial inhibition), diafenthiuron 50 WP (66.51 to 78.70% mycelial inhibition), flubendiamide 480 SC (63.27 to 78.41% mycelial inhibition), chlorantranilliprole 18.5 SC (62.36 to 81.82% inhibition), spinosad 45 SC (64.43 to 78.71% mycelia inhibition), emamectin benzoate 5 WG (63.84 to 72.40% mycelial inhibition) and novaluron 10 EC (63.66 to 70.63 % inhibition). The least mycelial inhibition was observed in case of mancozeb 75 WP + fenvalerate 20 EC (62.61 to 75.55%).