Thickett, K., VanDerWal, J., Lovett-Doust, L., and Anderson, T.R. (2007) A method for screening soybean seedlings for resistance to northern stem canker caused by Diaporthe phaseolorum var. caulivora. Canadian Journal of Plant Science, 87 (2). pp. 443-446.

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Abstract

Five soybean varieties, Williams, Harosoy, AC Hime, Coles and Leo were inoculated 2 and 4 wk after planting with Diaporthe phaseolorum var. caulivora to determine if differences in resistance to stem canker could be detected in the early stages of plant development. Seedling stems were severed above the unifoliolate leaves and inoculum was applied to the cut surface. Stem lesion lengths were measured at 1, 2 and 3 wk following inoculation. The mean lesion length on seedlings inoculated 2 wk after planting (27.2 mm) was significantly less than seedlings inoculated 4 wk after planting (44.5 mm). Based on mean lesion length, Williams was the most susceptible variety followed by Harosoy. AC Hime, Coles and Leo were equally resistant. Stem canker development measured at 2 and 3 wk following inoculation was negatively correlated with stem moisture at the time of inoculation suggesting that stem moisture is important in the development and severity of stem canker.

Item ID:	10100
Item Type:	Article (Research - C1)
ISSN:	1918-1833
Keywords:	Diaporthe phaseolorum var. caulivora; Glycine max; inoculation method; northern stem canker; resistance; screening method; ecology
Date Deposited:	12 Apr 2010 00:20
FoR Codes:	06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060799 Plant Biology not elsewhere classified @ 40% 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060201 Behavioural Ecology @ 60%
SEO Codes:	82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8204 Summer Grains and Oilseeds > 820405 Soybeans @ 50% 82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8298 Environmentally Sustainable Plant Production > 829899 Environmentally Sustainable Plant Production not elsewhere classified @ 50%
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