How to cite this article:
Das, R., Mondal, B., Mondal, P., Khatua, D. C. and Mukherjee,N. 2014. Biological management of citrus canker on acid limethrough Bacillus subtilis (S-12) inWest Bengal, India. Journal ofbiopesticides, 7, 38-41.
Citrus cankerincited by Xanthomonas axonopodis pv. citri (Hasse) Vauterin etal. is a serious disease of acid lime [Citrus aurantifolia (Christm.)Swingle] all over the world including West Bengal, India. The disease dependsmuch upon its secondary spread through rain splash, mechanical contact in stormyweather and leaf damage by citrus leaf minor (Phyllocnistis citrella Stainton).For controlling citrus canker the usual recommendation includes antibiotics andsome agrochemicals in the form of spraying. Little work has been reported onbiological management of the disease. An experiment was set up in a farmer’sfield (acid lime orchard), Nadia, West Bengal, using an inhibitory strain of Bacillussubtilis (S-12) during 2009-2010. Single spray of aqueous suspension (2.7 x109 cells/ml) of bacterialcells was spread on 5 batches (6 numbers of plants/batch) of plants keeping 4batches unsprayed. Per cent Disease Index (PDI) was recorded throughout theyear at every month using 0-4 scale from both treated and untreated plants.Initial PDI was also taken before one week of spraying. A single spray of thebacterial suspension during the peak season for disease that is in July hasresulted in a satisfactory decline of the disease. A sharp decline of thedisease was recorded at 20 days after treatment indicating that the sporeforming bacteria might have taken over on the leaf surfaces of the plants.
How to cite this article:
Das, R., Mondal, B., Mondal, P., Khatua, D. C. and Mukherjee,N. 2014. Biological management of citrus canker on acid limethrough Bacillus subtilis (S-12) inWest Bengal, India. Journal ofbiopesticides, 7, 38-41.
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