bacterial stalk rot

Ears and shank may also show rot. Bacterial Stalk rot - Erwinia dissolvens Symptoms The basal internodes develop soft rot and give a water soaked appearance. Wilting upper leaves and soft rot at the whorl’s base can also occur. We present the results of the first molecular mapping work on resistance to bacterial stalk rot (BSR) caused by Pectobacterium chrysanthemi pv. The bacteria are splashed onto leaves and infection is promoted by extended wet periods. Bacterial stalk rot is caused by a bacterial pathogen called Pectobacterium spp. Pathogen involved: Erwinia chrysanthemi pv. Conditions for Disease Development: The bacterium causing the disease attacks the plant through Affected plants suddenly collapse and fall over. Rotting at the base of the whorl may also occur. Infected stalks rot and lodge. Bacterial stalk rot, as the name implies, is caused by a bacterium that grows well on wet, decaying plant material. The bacteria survive in the plant debris and in soil. zeae Burk., McFad. in tropical white maize. Infection starts at the petiole axis (Figure 1) which has abundance of free moisture and progresses to the stem. Bacterial stalk rot typically smells bad as infection takes hold and systematically moves up the stalk and throughout the plant. Bacterial stalk rot of corn is favored under conditions of high air temperatures and wet weather or high humidity. A mild sweet fermenting odour accompanies such rotting. zeae have economic importance of reduced crop yield up to 98.8%. Bacterial stalk rot of maize caused by Dickeya zeae previously known as E. chrysanthemi pv. Foul odor may be produced on the affected tissues. Leaves some time show signs of wilting and affected plants topple down in few days. Split the stalks and a discolored, soft, slimy pith is present. High heat and humidity, heavy rainfall … Bacterial stalk rot is not common but often shows up with overhead irrigation of corn, especially where the water source is a lake, pond, or slow-moving stream. Characteristic Symptoms: The bacterium causes the internodes to turn tan to brown and become water soaked, soft and slimy. Area of impact: Stalk Description: Lowest internodes turn brown and become soft and slimy sometimes with a foul odor. and Dim.

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