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Increase in Yield of Wheat (Triticum aestivum L. variety ‘N.P. 718’)¹

Plants of wheat were given two to four aqueous sprays of Mendok at 10-day intervals at 250, 500, and 1,000 ppm. The first foliar application was made at the flag leaf stage. The treatments failed to elicit male or female gamete sterility. However, at low dosages the treated plants were shorter, had stiffer straw, were less susceptible to lodging, and gave a higher grain yield as compared to the controls. Augmentation in grain yield was particularly significant at 250 ppm (two and three sprays) on per plant basis, and at 1,000 ppm (two, three, and four sprays) on the basis of the tallest earing tiller. Increase in grain yield was due to greater number of earing tillers (except at 1,000 ppm, four sprays, where there was actually a decrease) and grains per ear.

Key Words: Phytogametocidal compound • Foliar sprays • Chemical induction of male sterility • Dwarfing • Lodging • Tillering

Received for publication June 19, 1968.