News
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Managing needle blights of pine
Published on May 25, 2012
Dothistroma needle blight and brown spot needle blight need to be properly managed in pines. Recognize the symptoms and know how to control these diseases this summer. -
Black vine weevil adults emerging in Ottawa County
Published on May 24, 2012
Black vine weevil adults have been found in Michigan this week, so now is a good time to scout for damage and plan your nursery management strategy. -
Downy mildew in herbaceous perennials
Published on May 14, 2012
Downy mildew is a serious disease in both greenhouse and nursery-grown herbaceous perennials. Recognize the symptoms and understand the IPM strategies to prevent this disease from getting started in your operation. -
Over-wintering Douglas-fir midges are emerging
Published on May 11, 2012
Douglas-fir needle midge infestations can cause severe needle loss and trees to be unsalable at harvest. Timing your pesticide application at emergence is critical for control. -
Late frost injury on nursery and landscape plants
Published on May 4, 2012
Damage may appear dramatic at first, but long-term prognosis for most plants is good. -
Michigan awash with Phomopsis cankers on spruce trees and seedlings
Published on April 27, 2012
Phomopsis cankers are causing shoot blight symptoms in nurseries and a general decline of spruce trees in the landscape. This unparalleled disease of spruce can be found on blue, white and Norway spruce throughout the Lower Peninsula. -
Monitor now for mite activity on conifers
Published on April 26, 2012
The first generation of mites begins hatching in the spring. Early scouting of conifers helps you monitor populations for an increase that may require control. -
Be on the lookout for a new plant disease, boxwood blight
Published on April 26, 2012
A new disease of boxwood named boxwood blight (Claonectria pseudonaviculata or Cylindrocladium buxicola) has been detected in parts of the eastern United States. A new MSU Extension factsheet helps identify the symptoms of this serious plant problem. -
Pine needle scale crawlers should be hatching
Published on April 26, 2012
Egg hatch of pine needle scale typically occurs just as common lilac reaches full bloom. -
White pine blister rust damage showing up
Published on April 6, 2012
White pine blister rust cankers can kill branches or if they are found on the trunk they can girdle and eventually kill the tree.