Abstract
Ten aliphatic alcohols, ranging in chain length from C 5C 12, have been tested as chemical pruning-agents to control side shoot growth in the tomato when sprayed as aqueous emulsions on the leaf axils. The straight-chain alcohols C 8C 10 gave the most satisfactory elimination of side shoots with the least injury to the rest of the plant. Two commercially available formulations of these alcohols were also effective pruning-agents for tomato side shoots. The selectivity of decan-1-ol towards side shoots has been shown to be influenced by the nature of the surfactant used to prepare an aqueous emulsion of the compound. To avoid possible injury to surrounding plant tissues resulting from inadvertent spray drift, alternative methods of applying chemical pruning-agents have been considered. Contact treatment of side shoots by means of a small brush or similar applicator was found to be as effective as spray treatment, and resulted in negligible damage to the rest of the plant.
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