| Author(s) | S. Al-Kherb,* Salem Al- Ghamdi** and S. El- Hussieni,* |
| Affiliation | Department of Plant Protection, Department of Plant Production College of Agriculture, King Saudi University, Box. 2460, Riyadh 11451 Kingdom of Saudi Arabia |
| Title | Evaluation of Some Soybean Cultivars for Susceptibility to Colletotrichum dematium |
| Source | Journal of King Saud University. Agricultural Sciences. Volume 15, No 1. (2003/1423) |
| Abstract | Abstract. In 1998, reddish brown lesions were observed on leaves and stems of soybean plants at the experimental research station of College of Agriculture at Dierab region. The pathogen was identified as Colletotrichum dematium based on morphological and cultural characteristics. Twelve soybean cultivars were tested for their response to infection by C. dematium under greenhouse conditions. Six seeds of each cultivar were planted in 15 cm. diameter pots with five replicates arranged in completely randomized design on a greenhouse bench. The experiment was conducted twice. Seedlings at growth stage (VII) were inoculated with conidial suspension of 3x106 spores/ml. Disease severity was assessed 7 days after inoculations, using a scale of 0-4. The results indicated that all twelve tested cultivars were susceptible to infection. Vernal, Harkey, Tracy. M and Kansas 5592, were the most susceptible cultivars, where the other tested cultivars varied significantly in their response to infection by the fungus. |
