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Leucostoma kunzei or “Valsa kunzei” (Fr.:Fr) Fr. (conidial state -Cytospora kunzei) was first described by Waterman in 1955, [6] as the causal agent for the branch and stem cankers she observed on Douglas fir. Waterman cultured the fungus from cankered trees from Washington, Pennsylvania, Vermont, New Hampshire, and Massachusetts and ...
Vinca difformis in habitat, Cáceres, Spain. Vinca plants are subshrubs or herbaceous, and have slender trailing stems 1–2 m (3 + 1 ⁄ 2 – 6 + 1 ⁄ 2 ft) long but not growing more than 20–70 cm (8– 27 + 1 ⁄ 2 in) above ground; the stems frequently take root where they touch the ground, enabling the plant to spread widely.
Soybean stem canker stem browning. Disease symptoms occur primarily on the stems, leaves and can lead to whole plant symptoms. [2] Reddish brown lesions on the lower stem of soybean plants progress into brown cankers. In some cases, the disease can spread to all parts of the stem. Stem girdling can result in premature plant death. [2]
Butternut canker is a lethal disease of butternut trees, and has no cure.. A plant canker is a small area of dead tissue, which grows slowly, often over years. Some cankers are of only minor consequence, but others are ultimately lethal and therefore can have major economic implications for agriculture and horticulture.
Colletotrichum stem canker Colletotrichum crassipes. Damping-off Pythium aphanidermatum Pythium splendens var. hawaiianum. Dieback and stem canker Colletotrichum capsici. Diplodia stem canker Diplodia cajani. Dry root rot Macrophomina phaseolina = Rhizoctonia bataticola. Fusarium leaf blight Fusarium pallidoroseum = Fusarium semitectum ...
Dermea canker Dermea pseudotsugae: Dime canker Durandiella pseudotsugae: Fusarium hypocotyl rot Fusarium oxysporum: Gray-brown sap rot Cryptoporus volvatus: Gray mold Botrytis cinerea. Botryotinia fuckelinana [teleomorph] Laminated root rot Phellinus weirii: Phoma seedling blight Phoma eupyrena: Phomopsis canker Diaporthe lokoyae. Phomopsis ...
Some rust species form perennial systemic infections that may cause plant deformities such as growth retardation, witch's broom, stem canker, galls, or hypertrophy of affected plant parts. Rusts get their name because they are most commonly observed as deposits of powdery rust-coloured or brown spores on plant surfaces.
Stem canker on sunflower is caused by the fungal pathogen Phomopsis helianthi (teleomorph = Diaporthe helianthi). [1] There are many "Phomopsis" species that have a broad host range, but "Phomopsis helianthi" is the primary pathogen that infects sunflower, although it has also been seen to infect other, secondary hosts.