Effect of Sowing Dates, Temperatures on Germination, Flowering, and Yield of Cucumis metuliferus

Abstract

Seed germination, growth, flowering, and yields of Cucumis metuliferus Mey. were examined in several seasons and conditions in the northern Negev, Israel. Germination was optimal between 20 and 35C. Germination was delayed at 12C, totally inhibited at SC, and greatly inhibited above 35C. Salinity increased the time required for full germination. Plants sown in mid-March set fruit in mid-May and gave a higher yield of export-quality fruits than plants sown in mid-April, which set fruit normally but produced a large proportion of small (<200 g) fruits. Plants sown in June did not flower until October. C. metuliferus sown in a greenhouse on three dates in October and November developed very slowly during the cold months and leaves were chlorotic; however, fast growth and development resumed in the spring and high yields were eventually achieved.