Role of Pinching and Spraying Amino Acid on the Vegetative and Flowering Growth Attributes of Okra Varieties

Abstract

The experiment was conducted in the vegetable field of the Department of Horticulture and Landscape Engineering/College of Agriculture and Forestry/University of Mosul during the spring season of 2024 to study the effect of fertilization and spraying with the amino acid Ticamin Max on three okra varieties. The experiment included three factors, the first factor is cutting with two treatments: cutting and no cutting, the second factor is the amino acid Ticamin Max with three concentrations (0, 3, 6) ml L^-1, while the third factor is the varieties used in the study: Betra, Sultana, and Clemson. Okra seeds were planted on 4/7/2024. The experiment was carried out according to a split-plot design, where treatments were randomly distributed according to the design used in the experiment, and Duncan’s test was used to compare the averages at a probability level of 5%. Thus, the number of experimental treatments became 18 factorial treatments (2 cutting treatments * 3 concentrations of amino acid * 3 varieties) with 3 replicates. The results showed that cutting treatments and the spray level of 6 ml L^-1 were superior in the traits of shoot height, number of branches, number of leaves, leaf area, number of days needed for flowering, and fruit set percentage, while Betra was superior in number of branches and number of days needed for flowering, while Clemson was superior in fruit set percentage.