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Forest Insect and Disease Survey; Ontario, 1965 - NFIS

Forest Insect and Disease Survey; Ontario, 1965 - NFIS

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G 7<br />

Summary of New Infection of Hypoxylon Canker <strong>and</strong> Mortality<br />

in Sample Plots in Trembling Aspen St<strong>and</strong>s in <strong>1965</strong><br />

Av. d.b.h.<br />

Location in inches<br />

Sioux. Lookout<br />

Site<br />

quality<br />

Per cent<br />

Per cent<br />

incidence incidence Total per cent<br />

new infection new mortality mortality<br />

196 <strong>1965</strong> <strong>1965</strong><br />

Red Lake 6 Fair 0 2 25<br />

Ear Falls 6 Good 0 0 0<br />

Kenora District<br />

Caribou Falls 5 Fair 0 0 0<br />

Sioux Narrows 4 Fair 0 0 0<br />

Kekekwa Lake 5 Good 0 0 0<br />

Fort Frances District<br />

Redgut Bay<br />

Rainy Lake 4 Good 0 1 4<br />

Northeast Bay<br />

Rainy Lake 6 Poor C 6 11<br />

Northwest Bay<br />

Rainy Lake 4 Fair 4 5 9<br />

Eltrut Lake 5 Fair 2 3 6<br />

Kingsford Twp. 3 Good 0 0 1<br />

Leaf <strong>and</strong> Twig Blight of Aspens, Pollaccia radiosa (Leb.) Bald. & cif.<br />

This leaf <strong>and</strong> twig blight was common on trembling aspen regeneration in the<br />

region, Quantitative sampling showed that infection was heavy in the Sioux Lookout<br />

District, moderate in the Kenora District, <strong>and</strong> from light to moderate in the Fort<br />

Frances District (Table 8).

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