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Academic Research Journal of
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Academic Research Journal of Agricultural Science and Research Vol. 3(9), pp. 245-250. September, 2015. ISSN: 2360-7874 DOI: 10.14662/ARJASR2015.052
Full Length Research Efficacy of fungicides against Late blight of potato incited by Phytophthora infestans (Mont.) de Bary
1Muhammad Nasir Subhani, 2Shahbaz Talib Sahi, 3Abdul Rehman and 4Waqas Wakil
1Institute of Agricultural Sciences, University of the Punjab, Lahore, Pakistan 2Department of Plant Pathology, University of Agriculture, Faisalabad, Pakistan 3Department of Plant Pathology, University of Agriculture, Faisalabad, Pakistan 4Department of Agri. Entomology, University of Agriculture, Faisalabad, Pakistan
Accepted 21 July 2015
Chemical
control remains the most important control measure against late blight.
Growing potatoes without using fungicides has become unthinkable in most
parts of the world. The control strategy is primarily preventive but in
case the pathogen infects the crop, the epidemic must be stopped by
using more powerful formulations. Late blight disease severity was
successfully reduced by Metalaxyl + Mancozeb (Ridomil Gold) and
IproWelcarb + Mancozeb (Melody Dew) all the treated varieties/lines
after the second and third consecutive spray. In protective management
program Melody dew was most effective followed by Dithane M-45 while
Score was least effective on all the five varieties (Cardinal, Karoda,
Rodio, Shanan and Siply Red). Most effective spray interval was 7 days
followed by 14 days and 21, 28 days being least effective in spray
interval. Metalaxyl was proved to bean excellent weapon against
established infection. “Metalaxyl” in the trade name of Ridomil Gold was
most effective followed by Melody dew while Score being least effective
on all the five varieties (Cardinal, Karoda, Rodio, Shanan and Siply
Red). Three consecutive sprays at 7 days interval after disease
appearance were most effective among all the tested fungicides as
compared to 2 or 1 spray being least effective. Our study concluded that
host resistance when integrated with fungicide application enhanced the
control of late blight and reduced losses. How to cite this article: Subhani MN, Sahi ST, Rehman A, Wakil W (2015). Efficacy of fungicides against Late blight of potato incited by Phytophthora infestans (Mont.) de Bary. Acad. Res. J. Agri. Sci. Res. 3(9): 245-250.
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