Pythium Root Rot
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Scan day: 17 February 2014 UTC
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Virus safety - good
Description: Photograph of the stems of young tobacco plants affected with Pythium spp. causing damping off.
Pythium diseases (Pythium spp. ) on flue-cured tobacco (Nicotiana tabacum (flue-cured type)) - 1233227 Nicotiana tabacum (flue-cured type) Rhizoctonia spp. injury (left and right) and Pythium spp. injury in center to young seedlings. Damping off is a problem in tobacco plant beds but can be a problem in the field soon after transplanting. Pythium spp. causes a watery, soft rot of the lower stem and root system and is more common during cool, wet weather. Rhizoctonia causes brown, irregular cankers to develop on the lower stems and injury is more common during warm weather. Lesions can enlarge and girdle the stem while plants that are not severely damaged by Rhizoctonia may recover in the field.
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| Date | Creation Date: 2000-03-21T02:23:35Z Expiry Date: 2016-03-21T02:23:35Z |