Search results
Results from the WOW.Com Content Network
The disease tends to occur in patches due to a primarily short range spread mechanism. [3] Infected or decayed roots break close to the root collar forming “root balls.” [ 1 ] Laminated root rot is frequently detected during ground survey when canopy openings and standing dead and fallen trees are observed. [ 4 ]
Fungal diseases; Annosus root disease Heterobasidion annosum. Spiniger meineckellum [anamorph] Armillaria root disease Armillaria solidipes. Armillaria spp. Black stain root disease Leptographium wageneri var. pseudotsugae: Blue stain fungus Grosmannia clavigera: Bleeding sap rot Stereum sanguinolentum: Brown crumbly rot Fomitopsis pinicola ...
The plant pathogenic fungus Leucostoma kunzei (formerly Valsa kunzei) is the causal agent of Leucostoma canker (also known as Cytospora canker or spruce canker), a disease of spruce trees found in the Northern Hemisphere, predominantly on Norway spruce (Picea abies) and Colorado blue spruce (Picea pungens).
Because this disease is caused by multiple species within the genus Armillaria, it has an extremely broad host range. Hundreds of trees and shrubs are susceptible to root rot to varying degrees. In fact, the only two genera of tree known to be resistant to Armillaria root rot are larch and birch. Further investigation is being conducted for ...
Phomopsis blight of juniper is a foliar disease discovered in 1917 [1] caused by the fungal pathogen Phomopsis juniperovora.The fungus infects new growth of juniper trees or shrubs, i.e. the seedlings or young shoots of mature trees.
Lemon tree with Phytophthora collar rot. Collar rot is a symptomatically described disease that is usually caused by any one of various fungal and oomycete plant pathogens. It is present where the pathogen causes a lesion localized at or about the collet between the stem and the root. The lesions develop around the stem eventually forming a ...
A heavily infected plant can succumb to the disease and die. As this occurs, the Verticillium will form its survival structures and when the plant dies, its survival structures will be where the plant falls, releasing inoculates into the environment. The survival structures will then wait for a host plant to grow nearby and will start the cycle ...
Bacterial diseases; Common name: Scientific name: Plants affected: Bacterial leaf spot Erwinia carotovora subsp. carotovora: D, Ds Bacterial leaf spot E. chrysanthemi: D, Ds Bacterial leaf spot E. herbicola: Ds Bacterial leaf spot Pseudomonas sp. Ds Erwinia blight Erwinia carotovora subsp. carotovora: C, D, S Erwinia blight E. chrysanthemi: C, D, S