Chemical weed control tests: Yields of flower seed increased in experiments with various chemicals to control annual weed pests costly to growers
California Agriculture 11(9):12-15.
Published September 01, 1957
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Excellent control of annual weeds in flower seed plantings was achieved in Santa Barbara County test plots treated with Vapam, pre-emergence dinitro, methyl bromide, and Shell 20, during December 1954 and January 1955.