The use of chemical inducers for the development of host resistance is an alternative approach to plant disease management and is assumed to be much more environmentally sound than traditional pesticides. | Research Article Turk J Agric For 34 (2010) 475-485 © TÜBİTAK doi: Does treating faba bean seeds with chemical inducers simultaneously increase chocolate spot disease resistance and yield under field conditions? Salah EL-HENDAWY1, Waleed SHABAN2, Jun-Ichi SAKAGAMI3,* 1Agronomy Department, Faculty of Agriculture, Suez Canal University, 41522 Ismailia - EGYPT 2Agricultural Botany Department, Faculty of Agriculture, Suez Canal University, 41522 Ismailia - EGYPT 3Division of Crop Production and Environment, Japan International Research Center for Agricultural Sciences, Tsukuba, Ibaraki 305-8686 - JAPAN Received: Abstract: The use of chemical inducers for the development of host resistance is an alternative approach to plant disease management and is assumed to be much more environmentally sound than traditional pesticides. Five chemical inducers, salicylic acid, oxalic acid, ascorbic acid, dipotassium hydrogen phosphate (KH2PO4), and calcium chloride (CaCl2), all at concentrations of 10 mM, and an untreated control treatment were applied by seed soaking to compare their effectiveness in inducing resistance against chocolate spot disease (Botrytis fabae Sard.) in faba bean under greenhouse and field conditions, and to investigate whether use of these chemicals in this way is associated with a reduction in plant growth and yield under field conditions. A field experiment was conducted over 2 years (2007 and 2008) using a randomized complete block design with 4 replications. Results indicated that, under greenhouse and field conditions, KH2PO4 and CaCl2 treatments were either moderately or less effective in reducing disease severity of chocolate spot. However, both inducers significantly increased the growth and yield of faba beans under field conditions compared with the untreated control treatment. The greatest reduction in disease severity of chocolate spot under greenhouse and field conditions was observed in treatments of .
