Evaluation of potato genotypes against early blight (Alternaria alternata) of potato (Solanum tuberosum L.)
Keywords:
Early blight, genotypes, potato, AlternariaAbstract
Early blight (Alternaria alternata) of the potato is the most destructive disease in tropical and sub-tropical countries. Natural epidemics of early blight are strongly influenced by environmental conditions, even though severe disease appears every year in northern India. Twenty-eight genotypes were used in this study to differentiate between early blight resistance and susceptible genotypes selected to represent a range of reactions when screened field conditions. Out of twenty-eight genotypes/varieties, six genotypes viz., CP-3021, 3153, Atlantic, Chip-3, Jx-161 and MS/78-62 showed a resistant reaction. While thirteen genotypes were moderately resistant. However, six genotypes were susceptible while three genotypes were highly susceptible. Resistant varieties can be the simplest, effective and economical method of plant disease control. The use of resistant varieties cannot only ensure protection against diseases but also save the time, energy and money spent on other control methods.
Downloads
References
Campo ARO, Zambolim L, Vale FXR, Costa LC & Martinez CA. 2001. Efeito da pinta preta (Alternaria solani) no crescimento e produçao da batata (Solanum tuberosum L.). Fitopatologia Brasileira, Fortaleza, 26, 450.
Chakraborty A. 2012. Prevalence of diseases of potato in Indo-Gangetic plains of west Bengal. Journal of Mycopathology Research, 50(1): 117-119.
Chinnapappa M, Ramar A, Pugalendhi L, MuthulakshmiP & Vetrivelkalai P. 2018. Screening and identification of Piper species as rootstocks resistance against the root-knot nematode under glasshouse condition. Journal of Agriculture and Ecology, 6: 77-84.
Christ BJ & Maczuga SA. 1989. The effect of fungicide schedules and inoculums levels on early-blight severity and yield of potato. Plant Diseases, 73(8): 695-698.
FAO (Food and Agriculture Organization of the United Nations) 2008. The potato: cultivation. International year of the potato.
Ganie SA & Ghani MY. 2013. Field evaluation of potato germplasm for resistance to Alternaria solani. Indian Journal of Plant Protection, 41(2): 152-155.
George R & Sujatha KB. 2019. Screening of chilli genotypes for drought tolerance. Journal of Agriculture and Ecology, 8: 38-45.
Horsefall JH & Barrett RW. 1945. An improved grading system for measuring plant diseases. Phytopathology, 35: 655.
Kemmitt G. 2002. Early blight of potato and tomato. The Plant Health Instructor. DOI: 0 1094/PHI-1.-2002-0809-01.
Khurana SMP. 2004. Potato viruses and their management. Diseases of Fruits and Vegetables, 2: 389–440.
Kumar A, Pathak SP, Singh SK & Kumar G. 2015. Evaluation of potato genotypes against early blight of potato (Solanum tuberosum L.). Research in Environment and Life Sciences, 8(3): 489-492.
Shtienberg D, Doster M, Pelletier J & Fry W. 1989. Use simulation models to develop a low-risk strategy to suppress early and late blight in potato foliage. Phytopathology, 79(5): 590-595.
Vanderwaals JE, Korrsten L & Aveling TAS. 2001. A review of early blight on potatoes. African Plant Protection, 7(2): 91-102.
