August 0, 2024
Come visit us at our new location at 1075 South Ave W on the Missoula Fairgrounds.
This calendar is an ever-expanding database on information about life cycle events for common Missoula County plants, pests, and diseases. Below, you will find information about LEAST-TOXIC treatments (those that have the smallest impact on humans, pests, wildlife and insects, like bees and ladybugs, which benefit the garden) as well as HARD PESTICIDE treatments (those that have greater impact on humans and the environment).
Integrated Pest Management (IPM) strives to optimize plant health by:
IPM also means knowing as much about each pest as possible.
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Mourning Cloak Butterfly larvae may be present on aspen, willow, elm and poplar trees. No need to treat them.30
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Apples with sunken dark spots and leaves that have a velvety brown lesion are infected with apple scab. Treatment in late spring.2
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Apples with sunken dark spots and leaves that have a velvety brown lesion are infected with apple scab. Treatment in late spring.5
Mow Knapweed before seeds disperse6
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leaf scorch on trees and shrubs(papery curled margins) are showing up now, apply 1-2" much and water deeply every 7-10 days9
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Second generation leafroller and apple skeletonizer larva feeding on fruit tree leaves now, treat before larva are over 1/2"12
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Fall webworms may be present in chokecherries and cottonwoods. Prune out limb16
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Aspen leaves that have black spots or black curling leaves may be dropping early due to aspen leaf spot fungus. Rake up leaves to help prevent infection next year.23
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Second generation elm leaf beetle larva beginning to hatch. Treat if 75% of leaves infected with larva.26
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When weather starts to cool down SLOWLY start to decrease water on woody tress and shrubs to help prepare them for winter.30
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