Evaluation of Spraying Nano Sea Algae Extract on Growth and Yield of Cucurbita pepo L.

This study was conducted in Kufa, Najaf province, during the 2019–2020 season to examine the effect of spraying nano sea algae extract (no spraying, 0.5, and 1 ml L^-1) on the growth and yield of two cultivars of Cucurbita pepo L. c. v. (Domestic and Fadwa). The experiment was set up in a split-plot layout, where the cultivars were the main plots and the concentrations were in subplots with three replicates. Fadwa cultivar excelled the domestic cultivar in vegetative growth, including plant length, total number of leaves, and fresh and dry weight. Spraying with nano sea algae extract at 0.5 ml L^-1 concentration significant improved vegetative growth for both cultivars compared to the control treatment (spraying with water only). The interaction between cultivars and sea algae extract was also significant, as Fadwa + spraying 0.5 ml L^-1 of sea algae extract recorded higher vegetative growth and yield traits of Cucurbita pepo compared to Domestic + spraying with water only.