Friday, June 5, 2009

Landscape - Current Pests

The following are some current pests in the landscape to be on the watch for. Information is from the "What's Hot" section of the Ornamentals Hotline from the University of Delaware Cooperative Extension.

Exobasidium galls have been observed on camellias - probably also on Azalea/Rhododendron. The big clubby white new growth is striking, a truly "Ornamental" disease!

Lecanium scales (Fletcher Scale, European Fruit Lecanium) and Cottony scales (Cottony Maple, Cottony Camellia/Taxus) have begun egg laying. Watch for crawler hatch.

Emerald Ash borer was found in Kentucky this past week. Bloom of Black locust is known to correspond with EAB emergence in affected areas so keep an eye out.

Azalea bark scale females are producing the cottony egg masses. Crawlers can be treated with horticultural oil, insecticidal soap, Distance, pyrethroids, or soil drenches of imidacloprid should provide control.

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