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• Yellowheaded Sawfly Larvae - usually mid June to July on Spruce Trees
• Forest Tent Caterpillars - young caterpillars hatch around early May on Aspen, Poplar, Maple, Birch, Ash and sometimes fruit trees
• Satin Moth - usually in May and sometimes again in late summer on Willow and Poplar trees
• Cottony Psyllids - little control with any sprays on Black Ash trees
• Ash Leaf/Cone Caterpillar - early to mid June migrates on a silk line on Green Ash trees
• Pear Sawfly - early June on Purple Leaf Sandcherry and Cottoneaster |