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Some Effects of Foliar Applications of Maleic Hydrazide on Guineagrass¹

Synopsis: Four pounds per acre of maleic hydrazide stopped growth of 40-day old Guineagrass for about 20 days immediately following the spray application. After 20 days, the grass resumed its normal growth rate. When grass was cut a few days after spraying, growth was greatly curtailed for at least 60 days. Forty days after application, the grass had considerably higher protein content than untreated grass of the same age. Foliar application of urea when growth was stopped by maleic hydrazide significantly increased the crude protein content 10 days after application. Only traces of soluble N were found in the samples.

Scientific Aid and Project Supervisor, respectively, of a project cooperative between the Agricultural Research Service, U.S.D.A., and the University of Puerto Rico Agr. Exp. Sta.

Received for publication February 28, 1956.