Abstract
Abstract A Single foliar spray of 5-chloro,-2-thenyl, tri-n-butyl-phosphonium chloride (CTBP), 90% soluble powder; tetrahydrofur-furyl isothiocyanate (CHE 8570), 47% emulsifiable concentrate; 5-bromo,2-thenyl,tributyl-ammonium chloride (CHE 9064), 50% wettable powder; or 2,3,5-triiodobenzoic acid (TIBA), 14.2% emulsifiable concentrate, was applied when first flowers opened of ‘Salem’ and ‘Top Crop’ snap beans (Phaseolus vulgaris L.). Treatments of CHE 9064 at 8.72 g/ha and TIBA at 2.32 g/ha significantly increased yield of spring-planted ‘Salem’ in 1971. Treatments of CHE 8570 and CHE 9064 at 11.62 g/ha significantly increased yields of spring-planted ‘Top Crop’ in 1972 due to increased pod set Foliage samples at harvest showed no physiologically significant increase in P, K, Ca, Mg, Fe, or Zn for the treated plants compared with the controls.
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