Articles
MANAGING SWEETPOTATO WEEVIL (CYLAS FORMICARIUS FABRICIUS) IN WEST BENGAL, INDIA, BY SOME CHEMICALS, BIOPRODUCTS AND SEX PHEROMONE TRAPS
Article number
703_23
Pages
189 – 196
Language
English
Abstract
The efficacy of sex pheromone traps, entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae, chemical insecticides monochrotophos 36% SL, imidacloprid 17.8% SL and profenophos 50% EC, and soil amendment with mustard and neem (Azadirecta india) cakes for the management of Cylas formicarus in terms of yield attributing characters, average seasonal catch of male weevils per trap and their effect on storage root production were investigated.
Results indicated that root zone application of B. bassiana significantly reduced the intensity of root damage followed by use of sex pheromone traps of C. formicarius, and that both the treatments were statistically at par.
Vine dipping in monochrotophos followed by two sequential applications the same chemical, and soil amendment with neem cake also gave effective reductions in weevil damage to the crop.
The effect was comparable to that from the use of B. bassiana, pheromone traps, monochrotophos and amendment with mustard cake.
Very minimal crown infestation was observed in the plants sprayed with imidacloprid and profenophos. Trapping of the weevil by sex pheromone was found to very effective in reducing the weevil population.
The population of the weevils peaked during the month of March which coincides with active tuberization, and the percentages of crown and root damage were significantly low compared with the un-trapped plots.
Results indicated that root zone application of B. bassiana significantly reduced the intensity of root damage followed by use of sex pheromone traps of C. formicarius, and that both the treatments were statistically at par.
Vine dipping in monochrotophos followed by two sequential applications the same chemical, and soil amendment with neem cake also gave effective reductions in weevil damage to the crop.
The effect was comparable to that from the use of B. bassiana, pheromone traps, monochrotophos and amendment with mustard cake.
Very minimal crown infestation was observed in the plants sprayed with imidacloprid and profenophos. Trapping of the weevil by sex pheromone was found to very effective in reducing the weevil population.
The population of the weevils peaked during the month of March which coincides with active tuberization, and the percentages of crown and root damage were significantly low compared with the un-trapped plots.
Publication
Authors
J. Tarafdar, M.A. Sarkar
Keywords
fungi, insecticides, organics, crop damage
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