Bleckleg

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Plants with blackleg are stunted and have a stiff, erect growth habit. Foliage becomes chlorotic and the leaflets tend to roll upward at the margins. Stems of infected plants exhibit an inky black decay. The base of the stem is often completely rotted. In relatively dry soil, only the pith may show blackening. Tuber symptoms for blackleg are similar to those of soft rot. The soft rot Erwinia spp. may cause symptoms similar to blackleg but lack the characteristic inky black decay.

Presence among species

Pathogen Susceptible Host
Pectobacterium carotovorum Solanum tuberosum
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