LANDSCAPE SPECIALISTS  (copyr 2007) 
 
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Seattle - Pacific Northwest  - July (update 2025)

Integrated Pest Management ( IPM )
Monitoring & Treatment for Lawn and Landscape: 
 
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Spray Treatments for Shrubs and Tree's:

 Treatment may be needed for problems identified
 last year or after an  inspection. 

 Many problems require only thinning and pruning of damaged wood.

 Other problems are not serious enough to warrant treatment.

 Know what you are spraying for and when to spray.

 Below are listed key problems to look for now.

 Check the links on our Home Page for further information on
 least-toxic alternatives using Integrated Pest Management (IPM).

 An explanation for the symbols used below is located in our
 pamphlet entitled "IPM Index", accessible through our home page.


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This Month --- IPM Alert:  July

Monitor or take action for the following problems:


july

[/P]  PEAR SLUG

      [/T]  PRUNUS, STONEFRUIT, QUINCE, MOUNTAIN ASH, HAWTHORN, COTONEASTER

            [/S] UPPER LEAF:  SKELETONIZED, PEELED

                 [/M] JAS, JUN:

                      [/A]  JAS, JUN: HOSE


[/P]  SPIDER MITE

      [/T] CNFR, SPRUCE, CCYP, THUJA, JUNIPER, FIR, DFIR, ROSE

            [/S] LEAF: BROWN, STIPPLE, WEBBED (fine)

                 [/M] FEB: EGGS 

                      [/A] MAR: PSO, NEEM
                           (use caution on blue plants)

                 [/M] JAS, JUL: BUG, EGGS, WEBB, CAST, DUST

                      [/A] JAS, JUL: HOSE, SOAP, PSO, NEEM
[P/]  APHID

      [/T] MANY

            [/S]  LEAF: HONEYDEW, CAST, PUCKER, STUNT

                  [/M] MAY, JUN, APR:
                  [/M] AUG, SEP, JUL:

                       [A/] ANTC, APR:, JUL: HOSE, SOAP, NEEM
                       [A/] FEB, APR, MAR: DORM
                       [A/] PARA, PRED


[/P]  LEAFROLLER  (CATERPILLAR)

      [/T] MAPLE, ROSE, HAWTHORN, DOGWOOD, LILAC, RHODY, PRUNUS, MANY

            [/S] LEAF: WEBBED, ROLLED

                 [/M] APR: JUL:

                      [/A] ANTC: BT, NEEM, RPRUN, MECH (squash shelters)

                      [/A] PRED, PARA

[/P]  APPLE SCAB (FUNGUS)

      [/T]  APPLE, FIRETHORN, COTONEASTER, MOUNTAIN-ASH

            [/S] LEAF, FRUIT, FLOWER:  SPOTS, FUNGUS, DEFORM, DROP

                 [/M] MAY, JUN, APR:

                 [/M] AUG, SEP, JUL: leaf drop

                      [/A]  ANTC: LIME-SULFUR, NEEM

[/P]  LEAF SCORCH

      [/T]  DCID

            [/S] LEAF:  BROWN MARGIN

            [/S] TWIG:  DIEBACK

                 [/M] ANTC, JUL:

                      [/A]  ANTC, JUL: CULT

                      water, drainage, mulch, proper planting & fert, 
                      construction debris & compaction, environment
[/P] EUROPEAN PINE SHOOT MOTH  (CATERPILLAR)

     [/T] PINE

          [/S] LEAF:  DEFORMED, BROWN, STUNTED, CHEWED, COCOON

          [/S] BUD & SHOOT: (TENTS TARBALLS), CASES

               [/M] JUL:

                    [/A] PARA, CULT

                    [/A] JUL: NEEM?

[/P] sequoia PITCH MOTH

     [/T] PINE, DFIR

          [/S] TRUNK & BRANCH: GSF (orange, pink, milky), CASES

          [/S] PLANT: DEFORMED, STUNTED

               [/M] JUL:

                    [/A] ANTC, JUL: MECH remove pitch masses

                    [/A] CULT prune only in fall & early winter

[/P] SUNSCALD

     [/T] RHODY

          [/S] LEAF: BROWN BLOTCH (often with yellow halo)

               [/M] AUG, JUL:

                    [/A] AUG, JUL: CULT


[/P] ROSESLUG also BRISTLY ROSESLUG

     [/T] ROSE

          [/S] LEAF SKELETONIZED, SHOTHOLE

               [/M] APR:, JUL: (bristly)

                    [/A] ANTC: HOSE, MECH, PRED?, PARA? 

[/P]  FIR RUST (BRAKEN FERN & HUCKLEBERRY)

      [/T]  FIR

            [/S] LEAF: YELLOW, BROWN, DROP, PAPERY-TUBES (undersides)

                 [/M] AUG, JUL:

                      [/A]  NONE


[/P] PLANTING PROBLEM

     [/T] EVERGREENS

          [/S] FLAGGING

               [/M] JUL, AUG, JUN:

                    [/A] WINTER: REPLANT

[/P] ROOT DISTURBANCE

     [/T] EVERGREENS

          [/S] FLAGGING

               [/M] JUL, AUG, JUN:

                    [/A] ANTC: CULT

=========================================================================

The following should be included in all routine monitoring programs    

[/P] RHIZOSPHAERA NEEDLE CAST

     [/T] SPRUCE, PINE, DFIR, FIR

          [/S] LEAF: YELLOW MOTTLE, BROWN, DROP,FRB (with small white caps)

               [/M] ANTC:

                    [/A] ANTC: TPRUN, CULT (sanitation, air, partial sun)

[/P]  VERTICILLIUM WILT

      [/T]  MANY DCID

            [/S] LEAF:  WILT, DEAD, DROP, STUNTED, DISCOLORED, MARGIN BROWN

            [/S] CAMBRIUM:  GREEN STREAKS, BROWN STREAKS if DEAD

            [/S] BRANCH: DEAD

                 [/M] ANTC:

                      [/A] ANTC: RPRUN

                      [/A] ANTC: DESTROY if serious

                            sterilize tools


[/P]  ARMILLARIA ROOT ROT (FUNGUS)

      [/T]  MANY

            [/S]  LEAF:  BROWN, DROP

            [/S]  (TWIG, BRANCH, CROWN):  STUNTED, SICK

            [/S]  (LOWER TRUNK @ INNER BARK, SOIL):  WH FUNGAL SHEETS, GSF 

            [/S]  (LOWER TRUNK @ BARK, SOIL): BL FUNGAL STRANDS

                   [/M] ANTC: 

                        [/A]  ANTC: DESTROY


                       [/A] MAR, FEB:  BCS (3rd app)


                       [A/] ANTC:  CULTURAL improve AIR circulation

                       especially affects lower branches, juvenile foliage
                       do not overfertilize
                       could resemble dog urine damage - db

[/P]  PHYTOPHTHORA ROOT ROT

      [/T]  MANY

            [/S] LEAF:  WILT, YELLOW, BROWN

            [/S] (LOWER TRUNK @ INNER BARK): BR STREAKED FUNGUS

            [/S] BRANCH: DIEBACK, BEETLE INFESTED, CANKER

                 [/M]  ANTC:

                      [/A]  ANTC: DESTROY

[/P]  VERTICILLIUM WILT

      [/T]  MANY DCID

            [/S] LEAF:  WILT, DEAD, DROP, STUNTED, DISCOLORED, MARGIN BROWN

            [/S] CAMBRIUM:  GREEN STREAKS, BROWN STREAKS if DEAD

            [/S] BRANCH: DEAD

                 [/M] ANTC:

                      [/A] ANTC: RPRUN

                      [/A] ANTC: DESTROY if serious


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copyr Landscape Specialists, 2007