Some studies on the herbicidal properties of maleic hydrazide
AuthorsA. S. Crafts
H. B. Currier
H. R. Drever
Authors AffiliationsA. S. Crafts was Professor of Botany and Botanist in the Experiment Station, Davis; H. B. Currier was Professor of Botany and Botanist in the Experiment Station, Davis; H. R. Drever was Senior Laboratory Technician in the Department of Botany, Davis.
Hilgardia 27(22):723-757. DOI:10.3733/hilg.v27n22p723. October 1958.
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Tests were conducted to improve the formulation of maleic hydrazide (MH) with respect to absorption and to add to its lethal action. It was found that surfactants and humectants intensify the effects of MH, that water-soluble forms are more effective than oil carriers, and that high humidity promotes absorption. Effectiveness, as judged by extent of regrowth, was also increased somewhat by after-treatments with toxic aromatic oils, repeated sprays of MH, follow-up applications of sodium chlorate, and simulated tillage treatments performed several days after spraying. Disturbance of plants two months after treatment, however, seemed to break dormancy. MH-induced dormancy was more prolonged in old, well-established Bermudagrass cultures than in new ones; however, MH sprays on annual grass cultures at different stages of maturity proved that young plants showed more injury than old ones.
The research with labeled compounds reported in this paper was made possible by A.E.C. Contract AT(11-1)-34 Project No. 9.
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