canker

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Related to cankers: canker sore
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If Thousand Cankers Disease were to become widespread in Michigan it could cause significant losses to the states walnut timber and nut producing industries.
Spores of the pathogen are carried on the vector's body and infect the host tissue; the cankers produced by the pathogen coalesce and can girdle a trunk or branch, and in severe cases can cause decline and death of the tree.
In fact they were more abundant than the Eutypa dieback causal fungus Eutypa lata in the grapevine cankers tested.
Investigation of the Roles of Spittlebugs, Cankers, Stem Density and Ground Water in Branch Dieback and Mortality in Regenerating White Pine.
However, the presence of cankers in trees under organic, agro-forestry, and conventional orchard systems has been a limitation factor for persimmon production in Brazil and has increased the frustration of persimmon producers in the State of Parana (Campina Grande do Sul and Bocaiuva do Sul municipalities) and Santa Catarina (Monte Castelo municipality), which are considered the main persimmon producing areas.
BEASTS: Ants and winged aphids FUNGUS: Cankers on plant's stem
Thousand Cankers disease is attacking black walnuts, and cities from Pueblo to Longmont are suffering losses.
Spores are carded by rain to the stem, causing stem cankers that spread and kilt the trees.
The plot was observed for mirid damage symptoms which include lesions on pods, cankers on trucks and main branches, and dieback of twigs from January 2004 to December 2006.
However, pathologists haven't found phytophthora on new cankers spreading in the UK and on the Continent, suggesting that there must be another cause.
Bark infections appear most typically as large cankers that have brown to black discoloured outer bark on the lower trunk and seep dark red sap.
The Jamaican mother's helper's secret for clearing up cankers: Take a fresh piece of sorrel and place it on the sore until it becomes soggy.