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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 21, Number 3 (1970) → Semesan Fungicidal Dip Control Canker Diseases of Poplar Cutting in Alberta

Semesan Fungicidal Dip Control Canker Diseases of Poplar Cutting in Alberta

Poplars are an important constituent of shelterbelts in the Prairie Provinces of Canada, but several diseases, pests, and bad weather have caused damage (3, 7). In Alberta, hybrid poplars of the Russian1 and Northwest 2 cultivars are the most common shelterbelt trees, but unfortunately they are also the most diseased. Baranyay (2) reported: "A province wide survey in 1963 revealed that cankers caused by Cytospora chrysosperma (Pers.) Fr. and Septoria musiva Pk. are the most common infectious diseases of shelterbelts in Alberta." Both of these fungi are widespread on the major native poplars in Alberta, Populus tremuloides Michx. and Populus balsamifera L., but they normally cause little damage to them. Septoria musiva (perfect state Mycosphaerella populorum Thomp.) is common as a leafspotting parasite and Cytospora chrysosperma (perfect state Valsa sordida Nit.) normally inhabits bark and dead twigs of poplars but is of no consequence except on trees weakened by wounds, drought, frost, fire, or other diseases.


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Author(s): Drake Hocking

Publication: Tree Planters' Notes - Volume 21, Number 3 (1970)

Volume: 21

Number: 3