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Annual needle shed (nonparasitic) |
Older needles inside shrub yellow. Younger needles remain green. May occur in late spring or early summer or more slowly over the entire season. |
A normal part of the growth cycle. No control. |
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Phytophthora root and crown rot (fungus) |
Usually plants slowly decline in vigor and die. Brownish cortical tissues in the root and crown aras. Often associated with wet feet. |
Maintain good drainage and vigor. Mefenoxam or fosetyl-Al can be drenched into root and crown area. |
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Wet feet (nonparasitic) |
Plants turn yellow and brown. Whole plant may die rather rapidly. Usually occurs in spots where moisture has been excessive. Can be complicated by root and crown diseases. Can occur in long-established plantings if periods of drought alternated with periods of saturated soils. |
Maintain good drainage. Plant yews in spots that do not get overly wet. |
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Winter injury |
Small twigs at ends of branches turn yellow to reddish brown in later winter or early spring, especially on south and southwest sides where plants are exposed. Tip sof needles appear scorched. Tops of plants that have been under ice or snow may yellow. |
Promptly shake off heavy snow or ice loads. Protect from drying winter winds and sun. Grow in protected location. Apply mulches in late fall. |
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| University Outreach and Extension does not endorse commercial products. Follow the label on all pesticides. |
