بررسی میزان تحمل لاینهای خالص سویا به بیماری پوسیدگی ذغالی در مازندران

Soybean is cultivated in 50000 hactare annually in Mazandaran Provine. Macrophomina phaseolina is the causal agent of soybean charchoal rot in Mazandaran . From 2001 to 2002, 121 Soybean cultivarS were assessed in the field for resistance and susceptibility to Macrophomina phaseolina . The results showed that, there are a significant differences between soybean cultivars. Some cultivars were suceptible and some cultivars were rated moderately resistant to Macrophomina phaseolina. Entirely the late maturity group were moderately resistance to M. phaseoJina . Based on the levels of lower stem and taproot colonization by M . phaseolina , five cultivars with numbers of 58, 18 , I , 2 and 3 were rated moderately resistant to M. phaseolina

Keywords:

سویا , پوسیدگی ذغالی , مازندران , جویبار , آلودگی