Studies on Chemical Disbudding of Chrysanthemum

Abstract

SummaryThe effect of some chemicals on disbudding mainly of chrysanthemum and the methods of treatment were investigated.1. Sodium chlorate and Tomino, a 90% emulsion of ethyl toluene, tri-methyl benzene and C8 to C12 fatty acids, were the most effective disbudding agents for `Taibyosei -FR-1' tomato.Browning of leaves was more noticeable with sodium chlorate. 2. Symptoms of disbudding appeared early in tomato treated with Tomino at the point of application of the chemical.3. Tomino and a-methyl naphthalene were most effective for chemical disbudding of `Kiyomizu' chrysanthemum.4. The application of 2% Tomino to four cultivars of pot mum resulted in disbudding of axillary buds below the 4 th or 5 th node from the terminal bud in all cultivars.5. Treatment with 1 or 2% Tomino to seven cultivars of pot mum was most effective when the buds had received fourty-five short days.The long day interruption for one week during the short day induction had little effect on disbudding.6. Tomino inhibited stem elongation slightly.