Effectiveness of safety compounds for controlling botrytis neck rot of onion

Abstract

Onion (Allium cepa L.) is one of the major vegetable crops in Egypt that are damaged and lost by Botrytis neck rot. The aim of this study was to determine the efficacy of Silica gel, acetic acid, fulvic acid and charcoal substances against Botrytis allii under both in vitro and in greenhouse and field conditions. In vitro, the disease severity was reduced up to 73.7 % by acetic acid (1% conc.) followed by silica gel (3% conc.) by 47.5% compared with control. In the greenhouse and field conditions, silica gel (3%) and acetic acid (1%) were the best treatments and were shown to inhibit the disease up to 85.7 % in green house and up to 70.4% and 69 % in field respectively compared to control.