N. NIKOLOV1, K. SAKAKUSHEVA1 and D. CHRISTOVA2
1 University of Agriculture, BG – 4000 Plovdiv, Bulgaria
2 Institute of Polymers at BAS, BG – 1113 Sofia, Bulgaria
NIKOLOV, N., K. SAKAKUSHEVA and D. CHRISTOVA, 2013. Inhibitory effect of quaternary ammonium salts on the mycelium of Alternaria porri f. sp. solani, causing early blight disease on tomatoes. Bulg. J. Agric. Sci., 19: 450-453
By amination of polyvinil alcohol with N, N-dimethyl-4-amine-benzaldehyde and quaternization of the amine polymer obtained with dimethylsulphate, the bioactive aminepolymeric salt GN was obtained. In the period 2006-2007 GN in concentration 3 g/kg and 2 g/kg) as well as the alkyl ammonium salt Horti Desin (2 g/kg), were tested in two years experiment in field conditions against Alternaria porri f. sp. solani, the casual agent of early blight disease on tomatoes The results from the experiment with the tested pathogen at the beginning of vegetation at middle-early tomatoes, cv. “Ideal” show a preventive effect of GN (3 g/kg) – 39.3% and at GN (2 g/kg) – 33.2%, in comparison with Dithane 45M (2 g/kg), used as etalon – 31.1%. At the end of vegetation, the preventive effect of GN (3 g/kg) was 27.1%, in comparison with Dithane M 45 /2 g/kg – 29.5%. The preventive effect of preparation Horti Desin was 24.8% at the beginning and 20.3% at the end of vegetation.