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Plant/Pest of the Month 

April: Dipoldia Tip Blight
Diplodia tip blight is a common fungal disease of two needle pines in landscapes and urban areas.  This disease is characterized by the blight, or dieback, of the tips of branches that can be easily seen from a distance.  Management of the disease includes pruning, maintaining tree health and fungicide application when necessary.  For further information on diplodia tip blight:

Cornell University - Diplodia Tip Blight

Ohio State University - Diplodia Tip Blight of Two-Needled Pines

Michigan State University - Managing Diplodia Tip Blight


Frequently Discussed Topics

Following are publications that answer the most frequently asked questions the Plant & Pest Hotline staff answer this time of the year. Please call or contact us with your questions at 248-858-0902. During the non-growing season (October-March) we are open on Wednesdays, 8:30 am to 4:30 pm.
Pruning fruit trees in March

April Landscape Guide

 Boxelder Bugs

Carpenter Ants

Crabgrass Control in Lawn

 Causes of Bark-Splitting on Trees

Diplodia Trip Blight

Gray Snow Mold

Moss, Algae and Slime Molds in Lawn

Oak Wilt in Michigan

 Overwintering Home-Invading Pests

Pink Snow Mold

 Salt Injury to Landscape Plants

Spray Schedule for Pest Control on Apples, Crabapples, Quince and Pears

Spray Schedule for Pest Control on Peaches, Nectarines, Apricots, Cherries and Plums

Spray Schedule for Pest Control on Brambles (Blackberries/Raspberries)

Spray Schedule for Pest Control on Strawberries

Spray Schedule for Pest Control on Blueberries

Spray Schedule for Pest Control on Grapes

Spring-Summer Houseplant Guide


Spruce Gall Adelgids

Starting Seeds

Weeds in Turf

Western Conifer Seed Bug

Winterkill of Turfgrass


Seasonal Resource for Current Conditions and Plant/Pest Problems

An excellent resource for current conditions and plant/pest problems is the MSU Extension News web site, written by MSU faculty and MSU Extension staff.  These seasonal electronic articles offer Lawn & Garden pest management advice regarding a variety of topic areas such as Community Gardening, Composting & Recycling, Home Gardening, Landscaping, Pest Management, Turf, and Water Usage.  You can subscribe to various topics and have updates to their web site sent to you automatically.

Food donation fact sheet available from MSU Extension’s Michigan Fresh

Hungry people need good food – and gardeners can provide safe, nutritious food to those who might otherwise go without. Learn how community gardeners can donate extra produce to food pantries with Michigan State University Extension fact sheet “Fresh Produce Donation Guidelines for Gardeners.”
This fact sheet includes recommended ways to handle and prepare the produce, information about the Good Samaritan Food Donation Act, and more.  To get a free copy of this new fact sheet, please click here.
Fact sheets – on topics from apples to winter squash – are also available on the Michigan Fresh website at


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