Insect and Disease

yelloheaded sawfly

Yellow-headed Spruce Sawfly

Yellow-headed spruce sawfly  (Pikonema alaskensis) is  native species to Alberta. Also introduced European spruce sawfly (Gilpinia hercyniae ) is found in  Prairie provinces. Sawfly attacks native white, black and Engelmann spruce trees as well as variety of non-native spruce trees( Colorado, and Norway spruce).   It can create significant damage to many young spruce trees on …

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larve on needles

Spruce Budworm

The spruce budworm  (Choristoneura fumiferana) is a native moth and one of the most serious and damaging spruce and fir trees defoliator in North America. It primarily attacks spruces ( white, black Colorado)  and balsam fir trees in Alberta. It is a wasteful feeder on current year needles.   White spruce is naturally established on 9 …

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black know, swelled branch

Avoid mistakes in controlling of Black Knot

Black knot (Dibotryon morbosum) is naturally occurring disease throughout Canadian prairies. Trees and shrubs of Cherry ( Prunus) genus are mostly affected. Various species of ornamental or edible cherries (Maydays, Shubert chokecherry, chokecherry, Nanking cherry, pin cherry, sand cherry, sour cherry, etc.), Saskatoon’s, plums, flowering almond are mostly inflected by this disease. Unless you are …

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adult poplar borer

Poplar borer – wood boring beetle that attack Swedish Aspen and Towering Poplar

Poplar borer (Saperda calcarata Say) is a native North American wood boring beetle that attack native aspen, balsam poplar and willows. Poplar borer beetle also attack a variety of poplar cultivars including Swedish aspen and Towering Poplar. It is one of the most common insect for Swedish aspen and Towering poplar in urban area. Many …

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