Screening of potato cultivars against late blight caused by Phytophthora infestans

Ghazanfar, M.U. . Univ. Coll. of Agriculture; Wakil, W. . Dept. of Agricultural Entomology; Tufail, Q.A. . Dept. of Plant Pathology

Screening of potato cultivars against late blight caused by Phytophthora infestans

2016

Ghazanfar, M.U. (University of Sargodha (Pakistan). Univ. Coll. of Agriculture) | Wakil, W. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agricultural Entomology) | Tufail, Q.A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Pathology)

Late blight of potato causes significant yield losses and poses severe threat to potato production in Pakistan. Screening potato genotypes for resistance to Phytophthora infestans is the most effective and environmental friendly way to prevent widespread devastation by late blight. The present experiment was carried out to examine the level of field resistance to late blight, caused by Phytophthora infestans (Mont.) de Bary, in the local cultivated potato germplasm. Eighteen potato cultivars were screened under the field conditions in the Research Area of the Institute of Horticultural Sciences, University of Agriculture, Faisalabad, Pakistan after inoculation with highly virulent race of pathogen. The results revealed variable responses of all the cultivars towards the pathogen. Five potato cultivars viz. FD35-36, Diamond, Cardinal, Rossana and FD37-13 exhibited highly resistant reaction. Two cultivars NARC-46, FD63-4 exhibited moderately resistant response while FD69-1, SH103, FD65-4 and FD7-2 responded moderately susceptible response. The cultivars FD49-62, 394055-40, TPS9801, FD96-19, FD48-54 and FD50-1 were susceptible while the single cultivar Desiree exhibited highly susceptible response towards the disease. These resistant sources could further be exploited in breeding program for the development of disease resistant commercial cultivars against late blight pathogen.

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