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Pest Alert Archives

May 9, 2012, Vol. 10. No. 10	Plant Development Current Tasks to complete (clearwing ash borer; treatments for bronze birch border, codling moth, rhizosphaera needlecast, zimmerman pine moth) Current information (dieback and thin canopies in birches and maples) E-Samples (tent caterpillars)
May 2, 2012, Vol. 10 No. 9	Plant Development Current Tasks to complete (clearwing ash borer; diplodia tip blight; zimmerman pine moth) Current information (mild, but dry winter is beginning to show up on arborvitaes around the state; mt. pine beetle development is right on schedule for the year and an earlier flight is not expected) E-Samples (cedar-apple rust, mushrooms, sapsuckers drilling holes in pines and other trees)
April 16, 2012, Vol. 10 No. 8	Plant Development Current Tasks to complete (clearwing ash borer; diplodia tip blight; spruce spider mites) Current information (cold snap has resulted in some wilted foliage and dieback in shrubs; Meyers spruce?) E-Samples (oystershell scale on aspen, sapsucker injury on spruce; water, water everywhere)
April 4, 2012, Vol. 10, No. 7	Plant Development Current Tasks to complete (anthracnose and cane blight on raspberries; apple scab; pruning trees; removing wrap from trees; spruce needleminer; tent caterpillars) Current information (mountain pine beetle development) E-Samples (black knot on cherry; shothole borer; wetwood disease on trees)
March 28, 2012, Vol. 10, No. 6	Plant Development Current Tasks to complete (Anthracnose and cane blight on raspberries; apple scab; pruning trees, removing wrap from trees, spruce needleminer, tent caterpillars) Current Information (what happens if it freezes now?) E-samples (bark peeling from pines; planting too deep; tent caterpillars)
March 14, 2012, Vol. 10, No. 5	Current Information (germinating acorns; maple syrup season is a bust so far; winter desiccation injury on evergreens, an update on flooding) E-samples (needle discoloraiton on Austrian pines)
February 15, 2012, Vol. 10, No. 4	Current Information (Ice damage on maples; Insects in firewood) E-samples (Ice in small pines)
February 7, 2012, Vol. 10, No. 3	Current Information (Spraying for mountain pine beetle, Squirrel damage to pines) E-samples (Cracks in trees)
Jan. 18, 2012, Vol. 10, No. 2	Current Information (Fabric girdling trees) E-Samples (Black knot, Longhorned beetles in pines, and Oak gall, not acorn)
Jan. 4, 2012, Vol. 10, No 1	Current Information (Winter watering of woody plants, what is the warm weather going to do to our trees and shrubs?) E-Samples (Spruce bud scale; longhorned beetles in pines)
Dec. 15, 2011, Vol. 9, No 32	Current Information (Winter watering of woody plants, why are my evergreens truning color?) E-Samples (Pine aphids on Christmas trees, sandbar willow)
Nov. 9, 2011. Vol. 9, No. 31	Current Information (Finding the Perfect Christmas Tree) E-Samples (Acorn weevils, Cottonless Cottonwood Dying, Spruce Needle Miner, Zimmerman Pine Moth)
Oct. 26, 2011.Vol. 9, No. 30	Current Information ("Deer Proof" Plants, Apple maggot infested fruit) E-samples (Basswood identification, Clearwing ash borer)
Oct. 12, 2011, Vol. 9. No. 29	Current Information (Asian Ladybeetles, Vole Injury to Trees) E-samples (Oak galls, Reverting dwarf spruce, Woolly apple aphid)
September 28, 2011, Vol.9. No 28	Current Information (Autumn Color Changes, Autumn Color Change on Evergreens) E-Samples (Barklice, Buckeye Fruit-they are not chestnuts, Melampsora leaf rust on cottonwood, Tar spot on silver maple, Willow sawfly)
September 14, 2011, Vol.9 No. 27	Current Requests (What will the frost do to apples and pears?) E-samples (Buckthorn fruit- Don't eat it!, Chicken of the woods, a tree fungus, Cedar-apple rust, Spruce gall midge)
August 31, 2011, Vol. 9, No. 26	Current Concerns (growing walnut from seed; harvest walnuts, flooding clean-up around trees, how various tree species fared in summer flood) Upcoming events (mountain pine beetle workshops) E-samples (pine needle scale)
August 17, 2011. Vol. 9. No. 25	Current Concerns (Fall webworm, Flooding injury) E-Sample (Ash flower galls, Cedar-apple rust, Cedar-hawthorn rust, Hackberry witches'-broom)
August 10, 2011, Vol. 9. No. 24	Current Concerns (Fall webworm, Fall color change and flooding) E-Samples (Dog vomit fungus, Septoria leaf spot, Marssonina leaf spot)
August 3, 2011, Vol.9. No. 23	Plant development A Sad diagnostic Tale Dothistroma Needle Blight update E-Samples (Cooley Spruce Gall Adelgid, Leaf and shoot Blight of Serviceberry)
July 27, 2011, Vol. 9. No. 22	Plant development E-Samples (Ash Rust, Cottonwood petiole gall, Golden buprestid, Tar spot)
July 20, 2011, Vol. 9. No. 21	Plant development E-Samples (Herbicide injury on trees, Pear slugs, Poplar borer, Sucking insects-aphids & soft scales)
July 13, 2011, Vol. 9. No. 20	Plant development Tasks to start now (Apple maggot treatments) E-samples (Ash leaf curl aphids, Birch anthracnose, Cedar-apple rust, Maple anthracnose, Woolly elm aphid)
July 6, 2011, Vol. 9. No. 19	Plant development Task you better do ASAP! (Mountain Pine Beetle) Tasks to complete in about a week (Apple maggot treatment) E-samples (Ash leaf curl apid, Tar spot on maple, Ugly nest caterpillars)
June 22, 2011, Vol. 9. No. 18	Plant development Tasks to complete in about a week (Spruce bud scale treatment, Spruce needle miner treatment) E-samples (Diplodia tip blight, Plum pockets, Sprindle gall on cherries, ugly nest caterpillars, Venturia shoot and leaf blight on aspen)
June 15, 2011, Vol. 9. No. 17	Plant development Tasks to complete now (mountain pine beetle treatments to protect trees, Verbenone not recommended for conrol of pine beetles) Current Concern (Wilting of Colorado blue spruce tips) E-samples (Apple scab, Ash rust, Pear scab, Peach leaf curl)
June 8, 2011, Vol. 9. No. 16	Plant development Tasks to complete now (Codling moth control on apples, Pruning out watersprouts) E-sample (Ash rust, Crown rust on buckthorn, hackberry leaf tatter, Peach leaf curl)
June 1, 2011, Vol. 9. No 15	Plant development Tasks to complete now (Clearwing ash borer control, Diploida tip blight control, Dothistroma needle blight control, tent caterpillars are leaving the nest) Task to do in a week or two ( Codling moth control on apples and Shearing pine candles) E-sample (Pine sawfly, Anthracnose of Ash, Maple & Oak, Lecanium scale)
May 25, 2011, Vol. 9. No 14	Plant development What does flooding do to trees? Tasks to complete now (Clearwing ash borer control, Diploida tip blight control, Dothistroma needle blight control, tent caterpillars are leaving the nest) Task to do in a week or two ( Codling moth control on apples) E-sample (Ash rust, Western gall rust)
May 18, 2011, Vol. 9. No 13	Plant Development Tasks to Complete (Clearwing ash borer control, Diploida tip blight, Spruce spider mites) Tasks to wait for a couple weeks (Codling moth control on apples) E-samples (Sunscald & bark cracks on young trees, Hackberry leaf fall, Identification of a viburnum)
May 11, 2011, Vol. 9. No 12	Emerald Ash Borer Update Zimmerman pine moth control Clearwing ash borer control Codling moth control on apples E-Samples (Purple needles on spruce, Browning pines, Aphids on pine)
May 4, 2011, Vol. 9, No.11	Apple scab control Tent caterpillar control Zimmerman pine moth control Clearwing ash borer control Codling moth control on apples E-Samples (Black knot disease on chokecherry, repairing a split trunk)
April 27, 2011, Vol.9, No. 10	Plant Development Anthracnose and cane blight on raspberries Apple scab control Spruce needleminer control Tent caterpillar control Honeylocust canker Pine bark adelgid on white pine Arborvitae injury
April 20, 2011, Vol. 9. No. 9	Anthracnose and cane blight on raspberries Finish your tree pruning now Remove tree wrap Spruce needleminer control Tent caterpillar control Common Juniper Identified Spruce Bud Scale
April 13, 2011, Vol. 9. No. 8	Plant Development Apple scab and cedar-apple control Zimmerman pine moth Pine tortoise scale Giant water bug Declining spruce due to draining
April 6, 2011, Vol. 9, No. 7	The continuing problems with spruce Browning pines Locust borer
March 23, 2011, Vol. 9, No. 6	Pine tuning red Diplodia tip blight Squirrel damage in Siberian elm
March 9, 2011, Vol. 9, No. 5	Junipers turning brown Dying Scotch pines
Feb. 23, 2011, Vol. 9, No. 4	Maple Syrup More about Bunnies Mysterious decline of Austrian Pines in Montana
Feb. 9, 2011, Vol. 9, No. 3	Rabbit damage "Bleeding" maples
Jan. 26, 2011, Vol. 9, No. 2	What to do in February? The extreme (and persistent) cold weather Oak Galls
Jan. 12, 2011, Vol. 9. No. 1	Why is the bark missing from the tree? Pine pitch nodule maker Sapsuckers Longhorned beetles in furniture
Nov. 27, 2010, Vol. 8. No. 32	Selecting the perfect Christmas tree Diplodia tip blight Mountain pine beetle Zimmerman pine beetle
Oct. 27, 2010, Vol. 8, No. 31	Current concerns (what is wrong with my spruce tree?; All firewood is not the same) E-samples (spruce bud scale; sapsucker injury of elms)
Oct. 13, 2010, Vol. 8, No. 30	Current concerns (oak galls; Asian lady beetles) E-sample (codling moth in apples)
Oct. 6, 2010, Vol. 8, No. 29	Current concerns (fall color change on arborvitae foliage) E-samples(melampsora rust on cottonwoods; russeting on apples)
Sept. 29, 2010, Vol. 8, No. 28	Current concerns (mountain pine beetle) Information you can use (autumn foliage color) E-samples (wooly oak gall; subterranean termites)
Sept. 22, 2010, Vol. 8, No. 27	Current concerns (yellowing pine needles) Information you can use (buckeye "chestnut" nuts; growing oaks from acorns) E-samples (sooty blotch on apples; Massonina blight on cottonwood)
Sept. 15, 2010, Vol. 8, No. 26	Fall color season will be starting soon Current concerns (spruce spider mites) Information you can use (sulphur shelf mushrooms) E-sample (linden leaf blotch)
Sept. 1, 2010, Vol. 8, No. 25	Current Concerns (fall webworms are feeding; walnut anthracose; marssonina leaf spot of cottonwood) Information you can use (fall flowering of crabapples and lilacs; what trees are native to South Dakota?)
August 18, 2010, Vol. 8, No. 24	Current Concerns (fall webworms are feeding; mountain pine beetle attacks have peaked; why are the leaves turning yellow?) Information you can use (how many mountain pine beetles does it take to kill a tree?) E-samples (dwarf Alberta spruce reverting to species)
August 11, 2010, Vol. 8, No. 23	Current concerns (flooded soils and trees) Information you can use (soil testing for windbreaks) E-samples (oystershell scale on aspen)
August 4, 2010, Vol. 8, No. 22	Current concerns (bacterial blight on lilac windbreaks) E-samples (cedar-apple rust)
July 28, 2010, Vol. 8, No. 21	Plant Development Current concerns (recent storm damage to trees; homeowners should understand the risks of working around fallen trees; oak lace bugs) E-samples (scales on trees; bacterial blight on Amur maples)
July 21, 2010, Vol. 8, No. 20	Plant Development Current Concerns (Green metallic wood-borer being confused with emerald ash borer, Ash leaf curl aphid) E-samples (Cedar Bark beetles)
July 14, 2010, Vol.8, No 19	Plant Development Current Concerns (Juniper Spittlebug, Grasshopper injury to trees and shrubs) E-Samples (Hackberry decline, Chlorosis on trees, Dog Vomit fungus)
July 7, 2010, Vol. 8, No. 18	Plant Development Treatments to do now (apple maggot) Current concerns (ash leaf curl aphid; flooding and cherry injury) E-samples (frost and wind injury to spruce tips; yellowing spruce foliage; birch leaf miner; Marssonina leaf spot on white poplar; Dutch elm disease)
June 30, 2010, Vol. 8, No. 17	Plant Development Treatments to do now (spruce bud scale, spruce needle miner) Treatments to do soon (apple maggot) E-sample (erineum galls on viburnums, cottony maple scale, sycamore anthracnose, pseudomonas on lilacs)
June 23, 2010, Vol. 8, No. 16	Plant Development Treatments to do now (spruce bud scale, spruce needle miner) Treatments to do soon (apple maggot) Current concerns (yellowing and browning leaves due to wet soils, borwning of recently planted redcedar seedlings, Dutch elm disease) E-sample (juniper broom rust)
June 16, 2010, Vol. 8, No. 15	Plant Development Current Concerns (frost damage to spruce, leaf disease, apple scab, crown rust and tar spot are appearing) E-sample (elderberry borer, plum pockets, pine-oak gall, maple bladder gall mites)
June 9, 2010, Vol. 8, No. 14	Plant Development Treatments to begin now or very soon (codling moth, cottonwood borer, needlecast disease on spruce, pine needle scale, pine shearing, pruning watersprouts and suckers) Current concerns (bacterial blight on tree lilacs, rust disease) E-sample (cottony psyllid on black ask, young ash dying across the state)
June 2, 2010, Vol. 8, No. 13	Plant Development Treatments to begin now or very soon (codling moth, cottonwood borer, needlecast disease on spruce, pine needle scale, pine shearing) Current concerns (pine sawflies appearing in the Black Hills, sapsucker damage on pines, Siberian elm thinning canopies) E-samples (Venturia leaf and shoot blight on aspen, oak anthracnose)
May 26, 2010, Vol., 8, No. 12	Plant Development Treatments to begin now (clearwing ash borer, needlecast disease on spruce, codling moth) Current concerns (seed crop on elms and maples, pollen cones on pines, honeydew dripping from trees) E-sample (peach leaf curl, crown rust)
May 19, 2010, Vol. 8, No. 11	Plant Development Treatments to begin now (clearwing ash borer, rhizosphaera needlecast, spruce spider mites) Current concerns (frost damage to ash and hackberries, ash anthracnose, emerald ash borer update, emerald ash borer First Detector Program) E-sample (Zimmerman pine moth)
May 12, 2010, Vol. 8, No. 10	Plant Development Treatments to begin now (apple scab, tent caterpillar, spruce spider mites) Information requests (frost damage to trees, frost damage to ash and hackberries, emerald ash borer update, emerald ash borer First Detector Program)
Apr. 28, 2010, Vol. 8, No. 9	Plant Development Treatments to begin now (apple scab, clearwing ash borer, tent caterpillar, sprure spidcer mites)
Apr. 14, 2010, Vol. 8, No. 8	Plant Development Treatments to begin now (apple scab; tent caterpillar; Zimmerman pine moth) Black knot - can you save the tree by pruning? Why are the branches dying on my spruce?
Apr. 1, 2010, Vol. 8, No. 7	Plant Development Treatments to begin now (spruce needleminer; tent caterpillar) Treatments to begin soon (apple scab) How many trees do I need to have fruit Use care selecting fruit treees E-samples (more squirrel injury)