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Soil Testing
and Plant Diagnostic Services
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Plant Diagnostic Clinic
573-882-3019
White birches are not well adapted to Missouri. Consequently, they seldom survive more than a few years. River birch is very reliable and relatively problem free.
Small, irregular to circular brown spots with dark margins.
Remove and destroy fallen leaves. If serious, use thiophanate-methyl. Make first application at bud break and the second 10 to 14 days later. Under wet conditions, apply a third spray 10 to 14 days later.
Small branches and twigs are killed.
Updated 3/31/05
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