Effects of growth regulators on flowering and productivity of soybean (Glycine max cv. Davis)

Abstract

This study was conducted with the objective of determing the effects of growth regulators on flowering and productivity of soybean plant under greenhouse conditions. Applications of (2-chloroethyl) trimethylammonium chloride (CCC) 2,000 ppm, succinic acid-2,2-dimethylhydrazide (SADH) 4,000 ppm, gibberellic acid (GA) 100 ppm, indolylacetic acid (IAA) 100 ppm, and water (check treatment) were made on plants showing 4 leaves. SADH delayed the beginning of flowering. GA reduced time for maximum flowering. SADH reduced the flowering time in relation to the check treatment. Soybean plants treated with SADH produced a lower number of pods. 'Davis' soybean sprayed with GA presented an increase in dry weight of stems.