Validation of Downy Mildew Resistance in Cucumber Germplasm Through Artificial Screening

Authors

  • Vivek Hegde 1ICAR-Indian Institute of Horticultural Research, Bengaluru, India
  • Sandeep Kumar G M ICAR-Indian Institute of Horticultural Research, Bengaluru, India
  • Kavyashree K R ICAR-Indian Institute of Horticultural Research, Bengaluru, India
  • Vidya Sagar ICAR-Indian Institute of Vegetable Research, Varanasi, Uttar Pradesh, India
  • Shyam Sundar Dey ICAR-Indian Agricultural Research Institute, New Delhi 110012 India
  • Chithra Devi Pandey ICAR-National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi 110 012, India
  • Bharat H Gawade ICAR-National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi 110 012, India
  • Dr Pragya Ranjan ICAR-National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi 110 012, India

Keywords:

Cucumber, downy mildew, challenged inoculation, artificial screening, resistant source

Abstract

The present study was conducted to validate downy mildew resistance in three promising cucumber accessions, IC527431, IC527400, and IC572024, through artificial inoculation at the greenhouse facility of ICAR-IIHR, Bengaluru, during 2024–25. These lines were previously identified through a multi-location trial conducted at New Delhi, Varanasi, and Bengaluru, India, from 2022–24. Three check varieties, Pusa Uday, Pusa Barkha, and Arka Veera were included to compare the performance of the selected genotypes. Thirty-five days after inoculation, the check varieties Pusa Uday (77.78% PDI) and Pusa Barkha (51.85% PDI) exhibited highly susceptible reactions. In contrast, only mild symptoms were observed on the leaves of  IC572024, IC527431, and IC527400, with average Per cent Disease Index (PDI) values of 12.96, 15.74, and 29.63, respectively indicating resistant to moderately resistant responses. These germplasm lines appear promising as sources of resistance to downy mildew in cucumber and hold potential for use in the development of resistant cultivars.

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References

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Published

2025-09-24

How to Cite

Hegde, V., SandeepKumar , G. M., K R, K., Sagar, V. ., Dey, S. S. ., Pandey, C. D., Gawade, B. H. ., & Ranjan, P. (2025). Validation of Downy Mildew Resistance in Cucumber Germplasm Through Artificial Screening . Current Horticulture, 13(3), 80–82. Retrieved from https://www.currenthorticulture.com/index.php/CURHOR/article/view/278

Issue

Vol. 13 No. 3 (2025): July-September 2025

Section

Short-Communication

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