Effects of plant growth regulators and levels of irrigation on fruit development of bitter gourd (Momordica charantia L.)
1996
Kanapol Jutamanee | Orarat Mongkolporn (Kasetsart Univ., Bangkok (Thailand). Faculty of Liberal Arts and Science)
Study of plant growth regulators and levels of irrigation on fruit development of bitter gourd (Momordica charantia L.) cv. Khiewyoke 68 consisted of 3 experiments. Experiment 1: Using of plant growth regulators to induced pistillate flowers in bitter gourd. Fifty and 100 ppm of NAA 25, 50 ppm of ethephon and 5, 25 ppm of paclobutrazol were sprayed to plant when the third leaf expanded and the following week. All kinds of plant growth regulators increased number of pistillate flowers, especially 50 ppm of ethephon induced the highest number of pistillate flower. The height of plants treated with 25 ppm paclobutrazol were retared, compared with untreated trees. The experiment 2: Using of plants growth regulators on fruit development of bitter gourd. Giberellin at concentration of 10, 25 or 50 ppm was sprayed to the plants when they reached 45 days after gemination. Giberellin at all concentrations had no effect on total yields and had no effect on increasing width, lenght and fresh weight. Furthemore, using of giberellin increased the number of abnormal fruits. The experiment 3. Effect of irrigation levels on fruit development of bitter gourd. The experiment consisted of 3 levels of irrigation, namely 100, 150 and 200 percent of potential evapotranspiration (PET). The irrigation level of 200 percent gave the highest total yield, compared with 100 and 150 percent PET. Diameter, lenght and fresh weight were not different among the treatments but treatment of 200 percent PET gave the best growth rate, compared with the others.
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