Plenodomus lindquistii
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sunflower field infested with Plenodomus lindquistii (click on image to enlarge it)
Author(s): Howard F. Schwartz, Colorado State University
Source: IPM Images
Author(s): Howard F. Schwartz, Colorado State University
Source: IPM Images
symptoms of Plenodomus lindquistii on sunflower stem (click on image to enlarge it)
Author(s): Howard F. Schwartz, Colorado State University
Source: IPM Images
Author(s): Howard F. Schwartz, Colorado State University
Source: IPM Images
Plenodomus lindquistii (Frezzi) Gruyter, Aveskamp & Verkley 2013
The symptoms are characterised by dark lesions on the stem orinigationg from the bases of the petioles (black stem of sunflower). Infections may also occur at the collar region of the plants. They result in stunting, often premature death of the plant, yield losses of 10-30% as well as a reduced oil content. Epidemics typically develop after flowering.
Synonyms:
Phoma macdonaldii
Leptosphaeria lindquistii
