Plant Clinic

Pest Management Calendar

This calendar provides information about life cycle events for common Missoula County plants, pests, and diseases.

July 2024

This Month

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Jun 30	Jul 1	2	3	4	5	6
	Woody Perennial Tree Care: Don't fertilize woody perennial trees and shrubs any more, it encourages too lush of growth in case of a early hard freeze.				Prune out fireblight strikes on hot, dry days. Sterilize pruners between cuts.

7	8	9	10	11	12	13
Prune out fireblight strikes on hot, dry days. Sterilize pruners between cuts.	Trees may have spots on leaves from earlier fungal infections, no need to treat in hot, dry weather if you keep irrigation water off leaves!			Aphid populations start to decrease if weather is hot and dry

14	15	16	17	18	19	20
	Still time to manage Codling Moth, what product you spray determines how often you need to reapply for control.			Black vine weevil is notching leaves of peonies, lilacs and other landscape plants, treat larva in soil when Spirea vanhoutii is finished blooming.

21	22	23	24	25	26	27
Cherry fruit fly is usually in cherries by middle of July - to late to treat				Mow seed producing weeds(like knapweed) when they are in full flower and before they seed.		Hobo spiders start to move indoors - seal and/or spray foundation perimeters.

28	29	30	Jul 31	Aug 1	2	3
Hobo spiders start to move indoors - seal and/or spray foundation perimeters.	Mourning Cloak Butterfly larvae may be present on aspen, willow, elm and poplar trees. No need to treat them.

Woody Perennial Tree Care: Don't fertilize woody perennial trees and shrubs any more, it encourages too lush of growth in case of a early hard freeze. (Day 1 of 2 )

All Day

Woody Perennial Tree Care: Don't fertilize woody perennial trees and shrubs any more, it encourages too lush of growth in case of a early hard freeze. (Day 2 of 2 )

All Day

Prune out fireblight strikes on hot, dry days. Sterilize pruners between cuts. (Day 1 of 3 )

All Day

Prune out fireblight strikes on hot, dry days. Sterilize pruners between cuts. (Day 2 of 3 )

All Day

Prune out fireblight strikes on hot, dry days. Sterilize pruners between cuts. (Day 3 of 3 )

All Day

Trees may have spots on leaves from earlier fungal infections, no need to treat in hot, dry weather if you keep irrigation water off leaves! (Day 1 of 3 )

All Day

Trees may have spots on leaves from earlier fungal infections, no need to treat in hot, dry weather if you keep irrigation water off leaves! (Day 2 of 3 )

All Day

Trees may have spots on leaves from earlier fungal infections, no need to treat in hot, dry weather if you keep irrigation water off leaves! (Day 3 of 3 )

All Day

Aphid populations start to decrease if weather is hot and dry (Day 1 of 3 )

All Day

Aphid populations start to decrease if weather is hot and dry (Day 2 of 3 )

All Day

Aphid populations start to decrease if weather is hot and dry (Day 3 of 3 )

All Day

Still time to manage Codling Moth, what product you spray determines how often you need to reapply for control. (Day 1 of 3 )

All Day

Still time to manage Codling Moth, what product you spray determines how often you need to reapply for control. (Day 2 of 3 )

All Day

Still time to manage Codling Moth, what product you spray determines how often you need to reapply for control. (Day 3 of 3 )

All Day

Black vine weevil is notching leaves of peonies, lilacs and other landscape plants, treat larva in soil when Spirea vanhoutii is finished blooming. (Day 1 of 3 )

All Day

Black vine weevil is notching leaves of peonies, lilacs and other landscape plants, treat larva in soil when Spirea vanhoutii is finished blooming. (Day 2 of 3 )

All Day

Black vine weevil is notching leaves of peonies, lilacs and other landscape plants, treat larva in soil when Spirea vanhoutii is finished blooming. (Day 3 of 3 )

All Day

Cherry fruit fly is usually in cherries by middle of July - to late to treat (Day 1 of 3 )

All Day

Cherry fruit fly is usually in cherries by middle of July - to late to treat (Day 2 of 3 )

All Day

Cherry fruit fly is usually in cherries by middle of July - to late to treat (Day 3 of 3 )

All Day

Mow seed producing weeds(like knapweed) when they are in full flower and before they seed. (Day 1 of 2 )

All Day

Mow seed producing weeds(like knapweed) when they are in full flower and before they seed. (Day 2 of 2 )

All Day

Hobo spiders start to move indoors - seal and/or spray foundation perimeters. (Day 1 of 2 )

All Day

Hobo spiders start to move indoors - seal and/or spray foundation perimeters. (Day 2 of 2 )

All Day

Mourning Cloak Butterfly larvae may be present on aspen, willow, elm and poplar trees. No need to treat them. (Day 1 of 2 )

All Day

Mourning Cloak Butterfly larvae may be present on aspen, willow, elm and poplar trees. No need to treat them. (Day 2 of 2 )

All Day

Using Integrated Pest Management (IPM) strategies

IPM means getting to know your pests.

When is the pest MOST vulnerable, infective, or invasive?
When is the pest most vulnerable to least-toxic management strategies?
What is the least-toxic management tool that can be used successfully?

IPM optimizes plant health through the following:

Managing garden and landscape soils to promote drainage and aeration
Maximizing soil health by adding organic matter and properly timed fertilizers.
Pruning and irrigating based on the needs of particular plants.
Knowing the plant's level of susceptibility to pest damage.