RESPONSE OF LOCAL POTATO CULTIVARS TO LATE BLIGHT DISEASE (Phytophthora infestans (Mont.) de Bary) UNDER FIELD CONDITIONS

Authors

  • Rishav Pandit Tribhuvan University, Institute of Agriculture and Animal Science, Prithu Technical College, Bangaun, Dang, Nepal, Indonesia
  • Ravi Bhatta Tribhuvan University, Institute of Agriculture and Animal Science, Prithu Technical College, Bangaun, Dang, Nepal
  • Pooja Bhusal Central Department of Environmental Science, Tribhuvan University, Kathmandu, Nepal
  • Basistha Acharya Nepal Agricultural Research Council, Regional Agricultural Research Station, Khajura, Banke, Nepal
  • Subash Subedi Nepal Agricultural Research Council, National Maize Research Program Rampur, Chitwan, Nepal
  • Jiban Shrestha Nepal Agricultural Research Council, Agriculture Botany Division Khumaltar, Lalitpur, Nepal

Keywords:

Phytophthora infestans, disease severity, disease incidence, local cultivars

Abstract

Developing host resistance is an economic and long-term approach to disease management; however, resistance reactions that differ depending on the genotypes. Potato late blight is the devastating disease caused due to Phytophthora infestans (Mont.) de Bary.  In order to identify late blight resistance in potato genotypes, seven local potato cultivars (Bardiya Rato Local, Bardiya Seto Local, Cardinal, Deukhuri Rato Local, Deukhuri Seto Local, Kailali Local and Khumal Ujjowal) were evaluated in randomized complete block design (RCBD) with three replications during October 2018 to January 2019 on naturally infested soils in Deukhuri, Dang, Nepal. Results showed that significantly the highest disease incidence (99.17%), and the highest disease severity (88%) were found on Cardinal followed by Deukhuri Rato Local (64%), and Deukhuri Seto Local (60%). Potato cultivar namely Khumal Ujjowal was moderately resistant, whereas Deukhuri Rato local and Deukhuri Seto Local were susceptible to late blight disease. Significantly the highest yield (12.67 t ha-1) was produced by Khumal Ujjowal followed by Bardiya Rato Local (10.78 t ha-1) and Bardiya Seto Local (9.40 t ha-1). The disease incidence and Area under disease progressive curve (AUDPC) value was negatively co-related with the tuber yield. The potato cultivar Khumal Ujjowal followed by Bardiya Rato Local were found moderately resistant to late blight disease in Deukhuri conditions. This study suggests that potato cultivar Bardiya Rato Local can be grown for higher tuber production in Dang and similar topographic regions.

DOI: 10.37637/ab.v3i1.464

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Published

2020-06-22

How to Cite

Pandit, R., Bhatta, R., Bhusal, P., Acharya, B., Subedi, S., & Shrestha, J. (2020). RESPONSE OF LOCAL POTATO CULTIVARS TO LATE BLIGHT DISEASE (Phytophthora infestans (Mont.) de Bary) UNDER FIELD CONDITIONS. Agro Bali : Agricultural Journal, 3(1), 28–37. Retrieved from https://ejournal.unipas.ac.id/index.php/Agro/article/view/556

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Vol. 3 No. 1 (2020)

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