Cane and leaf rust

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Cane and leaf rust
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Kuehneola uredinis asexual spores
Scientific Classification
Kingdom: Fungi
Division: Basidiomycota
Class: Urediniomycetes
Order: Uredinales
Family: Phragmidiaceae
Genus: Kuehneola
Species: Kuehneola uredinis
Bramble stem rust

Cane and leaf rust
Pale blackberry rust
Chrysomyxa albida
Kuehneola albida
Oidium uredinis
Phragmidium albidum
Torula uredinis
Uredo muelleri

Uredo uredinis

Cane and leaf rust is a plant pathogenic fungus whose main host is the blackberry although infection of raspberry has been known, it is rare.[1]

Symptoms[edit | edit source]

Some blackberry cultivars, especially trailing varieties, are susceptible to cane and leaf rust. Symptoms are first visible as pale yellow pustules (uredinia) that protrude from splits in the bark of fruiting canes. Leaves are infected by spores (urediniospores) that originate from the uredinia and further pustules become visible on the underside of leaves in early summer. Severe infections may cause defoliation. Pale yellow-brown coloured spore case clusters develop on leaves in early autumn.[1]

Symptoms are similar to orange rust, which is a less common but more serious disease. Orange rust will cause small, weak shoots to develop near the base of the plant.[1]

Control[edit | edit source]

The best method of control is to remove and dispose of fruit canes soon after harvest to reduce inoculum sources in combination with the application of fungicides when growing highly susceptible varieties or when the cane and leaf rust is a known problem.[1]

Organic control methods[edit | edit source]

Destruction of fruited canes immediately after harvest will reduce incidence of the disease. Spraying with lime sulfur or fixed coppers will also help.[1]

Examples[edit | edit source]

References[edit | edit source]


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  1. a b c d e Koike, S.T.; Bolda, M.P.; Perry, E.J.; Gubler, W.D. and Bettiga, L.J. (2009). UC Pest Management Guidelines "Cane and Leaf Rust". University of California Integrated Pest Management Programme. Retrieved: 2011-01-07.