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Effect of ethephon (2-chlorethylphosphonic acid) on monoecious muskmelon (Cucumis melo L.) F1 hybrid seed production

Aleksandra Korzeniewska, Teresa Gałecka, Katarzyna Niemirowicz-Szczytt

Department of Plant Genetics, Breeding and Biotechnology
Warsaw Agricultural University
Nowoursynowska 166, 02-787 Warszawa, Poland

The effects of ethephon (2-chlorethylphosphonic acid) on muskmelon (Cucumis melo L.) sex expression, plant size, fruit, and sedd yield were tested in a three-year series of experiments. Plants of three inbred monoecious lines, in a plastic greenhouse, were treated with 300 and 400 parts per million (ppm) ethephon. Foliar application of the ethephon induced a temporary gynoecious stage (averaging 7-10 days) during which the development of male buds was inhibited. During this period in which only pistillate flowers are present, bees can be used for pollination thus eliminating the need for expensive hand pollination. Increased ethephon concentration reduced plant size, fruit, and seed yield but with 300-350 ppm of ethephon F1 hybrid seed production can be accomplished with monoecious lines as female parents.

Korzeniewska A., Gałecka T., Niemirowicz-Szczytt K., 1995. Effect of ethephon (2-chlorethylphosphonic acid) on monoecious muskmelon (Cucumis melo L.) F1 hybrid seed production. Folia Horticulturae 7/2: 25-34.