Vol. 40 No. 2 (2026):
Articles

Field-based assessment of sowing date-induced temperature stress on growth, sensitivity, and yield of four cucurbit species

pdf SM
  • K. Smiti,
  • U. Mina,
  • M. Verma
K. Smiti
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India.
U. Mina
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India.
M. Verma
National Bureau of Plant Genetic Resources, ICAR, New Delhi, India.
DOI: https://doi.org/10.36253/ahsc-18787
Categories

Published 2026-07-27

Keywords

  • Bottle gourd,
  • cucumber,
  • composite cucurbit growth index (CCGI),
  • Cucumis sativus,
  • growing degree days,
  • Lagenaria siceraria,
  • Luffa acutangula,
  • Luffa cylindrica,
  • oxidative stress,
  • ridge gourd,
  • sensitivity index (SI),
  • sponge gourd
    • ...More
    Less

How to Cite

Smiti, K., Mina, U., & Verma, M. (2026). Field-based assessment of sowing date-induced temperature stress on growth, sensitivity, and yield of four cucurbit species. Advances in Horticultural Science, 40(2), 193–208. https://doi.org/10.36253/ahsc-18787

Copyright (c) 2026 kakul smiti, Usha Mina, Manjusha Verma

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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Abstract

Climate-induced thermal stress is a major constraint limiting cucurbit productivity in subtropical agro-ecosystems. This study quantified the impact of sowing date-induced temperature variations (-0.49°C to +1.9°C) across three regimes - optimal (SD1), late (SD2), and very late (SD3) - on phenological, physiological, biochemical, and yield traits of four Cucurbitaceae species (ridge gourd, sponge gourd, bottle gourd, cucumber) over two seasons (summer-spring and kharif) in field experiments at IARI, New Delhi, India. Climatic suitability analysis indicated that summer-spring crops performed best within a temperature deviation of 0 to 0.95°C deviation, while kharif crops showed optimal performance near 0 to -0.2°C. The composite cucurbit growth index (CCGI) and sensitivity index (SI) revealed species-specific thermal responses, with sponge gourd showing maximum sensitivity during summer-spring and ridge gourd during kharif. Mid-season sowing (SD2) favored greater growth stability, as indicated by higher CCGI (0.466 in summer-spring and 0.388 in kharif). Overall, summer-spring provided more stable productivity (CCGI 0.4325; SI -0.0163) than kharif (CCGI 0.3458; SI -0.0899). These results highlight the utility of integrated indices for assessing crop resilience and identify mid-season sowing as an effective strategy to sustain cucurbit productivity under increasing climate variability.

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