Pest Management Calendar

 

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:

  • Managing garden and landscape soils for good drainage and aeration
  • Building soil by adding organic matter and properly timed fertilizers
  • Pruning and irrigating according to the needs of particular plants
  • Knowing the plant's level of susceptibility to pest damage

IPM also means knowing as much about each pest as possible.

  • 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?
August
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday

31

1

Apples with sunken dark spots and leaves that have a velvety brown lesion are infected with apple scab. Treatment in late spring.

2

3

4

5

Mow Knapweed before seeds disperse

6

7

8

leaf scorch on trees and shrubs(papery curled margins) are showing up now, apply 1-2" much and water deeply every 7-10 days

9

10

11

Second generation leafroller and apple skeletonizer larva feeding on fruit tree leaves now, treat before larva are over 1/2"

12

13

14

15

Fall webworms may be present in chokecherries and cottonwoods. Prune out limb

16

17

18

19

20

21

22

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

24

25

Second generation elm leaf beetle larva beginning to hatch. Treat if 75% of leaves infected with larva.

26

27

28

Second generation elm leaf beetle larva beginning to hatch. Treat if 75% of leaves infected with larva.

29

When weather starts to cool down SLOWLY start to decrease water on woody tress and shrubs to help prepare them for winter.

30

31

1

2

3

August Pest Breakdown