Late blight of potato is the major biotic constraint responsible for reduction in yield and quality of the pota-to crop. Globally, late blight is managed through application of multiple fungicidal chemical sprays affecting both human health and environment. Now a days, methods of biological control are gaining importance as these are non-toxic and also environment friendly. However, Phytophthora infestans multiplies very fast; therefore, biological con-trol method alone is not a viable option to manage late blight. Hence, integration of both methods is essential. Eleven treatments consisting of biocontrol agents and fungicides were evaluated against the late bight in three consecu-tive seasons (2011-12, 2012-13, 2013-14) at ICAR-CPRIC, Modipuram. Meerut. The results revealed that the treat-ments ( T1 to T10) are effective for managing the disease up to certain level; however, lowest average disease se-verity (27.89%) was recorded in treatment when Bacillus subtilis (B5-0.25%) + Trichoderma viride (TV-0.7%) was applied before disease appearance followed by cymoxanil8+mancozeb 64%WP (0.3%) at onset of late blight and one more spray of B5+ TV after seven days. The next best treatment was application of B5+ TV before appearance of disease followed by metalaxyl 8+mancozeb 64%WP (0.25%) at onset of late blight and one more spray of B5+ TV against control (average disease severity 91.94%) with higher yield also except the treatment of three spray of mancozeb 75% WP (0.2%). These treatments could be integrated in farmer practices.
Bacillus, Fungicides, Late blight, Potato, Trichoderma
Basu, A.(2009). Employing ecofriendly potato disease management allows organic tropical Indian production systems to prosper. As. J. Food Ag-Ind. Special Iss, S80-S87
Chowdappa, P., Mohan Kumar, S.P., Jyothi Lakshmi, M. and Upreti K.K. (2013). Growth stimulation and induction of systemic resistance in tomato against early and late blight by Bacillus subtilis OTPB1 or Trichoderma harzianum OTPB3. Biological Cont., 65 : 109â€“117
CPRI. (1999). Annual Progress Report. Central Potato Research Institute, Shimla, India
Daayf, F., Adam, L, and Fernando, W.G.D. (2003). Comparative screening of bacteria for biological control of potato late blight (strain US-8), using in-vitro, detached-leaves, and whole-plant testing systems. Can J. Plant Pathol., 25:276â€“284
El-Naggar, M.A., Abouleid, H.Z., El-Deeb, H.M., Abd-El-Kareem, F, and Elshahawy I.E. (2016). Biological control of potato late blight by means of induction systemic resistance and antagonism. R.J.P.B.C.S. 13:
Glare, T., Caradus, J., Gelernter, W., Jackson, T., Keyhani, N., Kohl, J., Marrone, P., Morin, L.and Stewart, A. (2012). Have biopesticides come of age? Trends Biotech., 30:250-258
Gupta, H., Singh, B.P. and Mohan, J. (2004). Bio-control of late blight of potato. Potato J., 31:39-42.
Harmendez, C.J., Andrew, R. and Ferre, Y.B.J. (2005). Evaluation of foliage resistance in potato to Phytophthora infestans based on international field network. Plant Pathol, 88:8-16
Henfling, J.W. (1987). Late blight of potato: Phytophthora infestans. Technical Information Bulletin 4 (second edition revised) CIP, Lima Peru: 22p
Lal, M., Arora, R.K., Maheshwari, U., Rawal, S. and Yadav, S. (2016). Impact of late blight occurrence on potato productivity during 2013-14. Int. J. Agricult. Stat. Sci., 12 (1):187-192
Lal, M., Singh, P.A., Tomar, S., Hussain, T., Sharma, S., Kaushik, S.K. and Singh, B.P. (2013). Antagonistic effect of bio-agents against three potato fungal diseases and their fungicidal sensitivity. Vegetos, 26:362-367
Lal, M., Yadav, S., Chand, S., Kaushik, S.K., Singh, B.P. and Sharma, S. (2015). Evaluation of fungicides against late blight (Phytophthora infestans) on susceptible and moderately resistant potato cultivars. Indian Phytopathol, 68:345-347
Panganiban, L., Cortes-Maramba, N., Dioquino, C., Suplido, M. L., Ho, H., Francisco-Rivera, A., & Manglicmot-Yabes, A. (2004). Correlation between blood ethylenethiourea and thyroid gland disorders among banana plantation workers in the Philippines. Environ. Health Perspect, 112: 42â€“45
Roy, S., Singh, B.P. and Bhattacharyya, S.K. (1991). Biocontrol of late blight of potato. Phytophthora News Letter,17:18
Sadlers, H.M. (1996). Use of bacteria in controlling fungal diseases. Gemuse Munchen., 32:180-181
Singh, G., Singh, V.P., Singh, B., and Kumar K. (2010). Comparative evaluation of chemical biological and integrated management strategies on late blight of tomato. Ann. Horticulture, 3:238-240
Singh, B.P. and Sharma, S. (2013). Forecasting of potato late blight. Intern J Innov Hort., 2(1):1-11
Sunaina, V., Ajay, S. and Dureja, P. (2005). Bacterial metabolites from Bacillus cereus B4 responsible for potato plant growth, Potato J., 32:187-188
Wastie, R.L. (1991). Breeding for resistance. In Advances in Plant Pathology, vol.7 Phytophthora infestans, the cause of late blight of potato, (Eds. DS.Ingram and PH Williams). London, Academic Press, 193-224.
Yao, Y., Li, Y., Chen, Z., Zheng, B., Zhang, L., Niu,B., Meng, J., Li, A., Zhang, J., and Wang, Q. (2016). Biological control of potato late blight using isolates of Trichoderma. Am. J. Potato Res. 93:33â€“42
Yuanâ€Hang ,Q.U., Qi, W., Yanâ€Po, Y., Zhenâ€Lin, H. and Yan L.(2014). Antagonistic Trichoderma isolates against potato late blight caused by Phytophthora infestans. Mycosystema,33:1231â€1241
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