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Tree Pest Alerts | South Dakota Department of Agriculture

Tree Pest Alerts

2016 Alerts

  • November 30, 2016
    • Timely Topics
      • Frost cankers and cracks, does wrapping help?
    • E-samples
      • Twigs falling from a coffee tree
      • Small holes in pine bark
  • November 16, 2016
    • Timely Topics
      • Picking out the perfect Christmas tree
      • Snow bending tree branches
      • Ice melt products and plants
    • E-samples
      • Junipers turning color
  • November 2, 2016
    • Timely Topics
      • Warm autumns and the problem for trees
      • The mountain pine beetle epidemic is ending
    • E-Samples
      • Spider webs appearing on lawns and trees
      • Zimmerman pine moth
  • October 19, 2016
    • Timely Topics
      • Fall color on arborvitae
      • Late frost allowing great fall color to occur
      • Woolly apple aphid
    • E-Samples
      • Chinese mantis
      • Fireblight
      • Pigeon tremex
      • Pine needle scale
      • Turf rust
  • October 5, 2016
    • Timely Topics
      • Acorn flour
      • Multicolored Asian lady beetles
    • E-samples
      • Bleeding canker on cottonwood
      • Spruce gall midge
  • September 28, 2016
    • Timely Topics
      • Pine needles turning yellow too!
      • Planting acorns
    • E-samples
      • Ash seed weevil
      • Willow sawfly
  • September 21, 2016
    • Timely Topics
      • Pine needles turning yellow
      • Verticillium wilt continues
    • E-Samples
      • Cytospora canker on cottonwood
      • Ash flower galls
      • Pear-shaped crabapple
  • September 14, 2016
    • Timely Topics
      • What causes trees to turn color
      • Fall is a good time to plant
    • E-samples
      • Cedar-apple rust
      • Oak rough bullet gall
      • Large Tolype moth
      • Transplant problems
  • September 7, 2016
    • Timely topics
      • Russian-olive wood
      • Walnut anthracnose
      • Transline herbicide and honeylocust
    • E-samples
      • Ash borers
      • Ghost plant
  • August 31, 2016
    • Timely topics
      • Lightning struck tress
      • Bur oak blight
      • Sulphur yellow fungus
      • Verticillium wilt in elms
    • E-samples
      • Willow cone gall
      • Can I eat this?
  • August 24, 2016
    • Timely topics
      • Planting buckeyes and walnuts
      • Verticillium wilt
      • Spring-flowering shrubs blooming
    • E-samples
      • Cottonwood petiole gall
      • Woolly oak gall
  • August 17, 2016
    • Plant development
    • Timely Topics
      • Squirrels and trees
      • What to do about a broken branch
    • E-samples
      • Juniper broom rust
      • Melampsora rust
  • August 10, 2016
    • Plant development
    • Timely Topics
      • Storm-resistant trees
      • Mountain pine beetles are beginning to fly
      • What crabapples are resistant to fireblight?
    • E-samples
      • Bur oak blight
      • Cicada killers
      • Chlorosis
      • Fall webworm
      • Tar spot
  • August 3, 2016
    • Plant development
    • Timely topics
      • Urban Wood Utilization coming soon
      • May I eat these fruits?
    • E-samples
      • Black blister beetles
      • Groundcherries
      • Peat scab
      • Walnut ceterpillar
      • Willow scab
  • July 27, 2016
    • Plant development
    • Timely topics
      • Trees and the current drought
      • Frost damage on spruce
    • E-samples
      • Cotoneaster leaf crumpler
      • Earwigs and pill bugs
      • Ichneumon wasps
      • Leaf blister on maple
      • Pear slugs
      • Spindle gall on plum
  • July 20, 2016
    • Plant development
    • Timely topics
      • Spotted wing drosophila
      • Hackberries are releafing
    • E-samples
      • Cedar-quince rust
      • Codling moth
      • Emerald ash borer look-alikes
      • Maple bladder gall mite
      • Plum pockets
      • Phomopsis canker on Russianolive
      • Root weevils coming in homes
  • July 13, 2016
    • Plant development
    • Timely topics
      • Sucking insects
      • Herbicide injury on trees
      • Eriophyid mites on spruce
    • E-samples
      • Cicadas
      • Leafy bracts on lindens
      • Common chokecherry, not poison sumac
  • July 6, 2016
    • Plant development
    • Timely topics
      • Drought and trees
      • Twigs dropping from cottonwoods
      • Codling moth and apples
    • E-samples
      • Maple bladder gall
      • Hackberry nipple gall
      • Smaller European elm bark beetle
  • June 29, 2016
    • Plant development
    • Tasks to complete in another week
      • Apple maggot
    • Timely Topics
      • What to do about spray-damaged trees
      • Why have the hackberry lost their leaves?
      • Heat stress
      • Woolly aphids on apples and elms
    • E-samples
      • Plum curculio
      • Clearwing ash borer pupae skins
      • Blister beetles
  • June 22, 2016
    • Plant development
    • Tasks to complete in another week
      • Apple maggot
    • Timely topics
      • New emerald ash borer infestations in Nebraska
      • Cottony ash psyllid
      • Chlorosis in trees
    • E-samples
      • Apple scab
      • Amur chokecherry fruit
      • Root weevils
  • June 15, 2016
    • Plant Development
    • Tasks to complete in another week
      • Spruce bud scale
      • Spruce needleminer
    • Timely Topics
      • Emerald ash borer discovered in Omaha, NE
      • Pine wilt disease advancing north
      • Dutch elm disease symptoms are appearing
    • E-samples
      • Forest tent caterpillar
      • Powdery mildew
      • Cedar-apple rust on apple, crabapple and hawthorn
      • Spindle galls
      • Plum pockets
  • June 8, 2016
    • Plant Development
    • Tasks to complete in another week or two
      • Spruce bud scale
      • Spruce needleminer
    • Timely Topics
      • Beetle-geddon (May beetles and June bugs)
      • Juniper tip blight
      • Ash leaf curl
    • E-samples
      • Ash/lilac borer
      • Ash rust
      • Buckeye rust
      • Cereal rust
      • Plum pockets
  • June 1, 2016
    • Plant development
    • Tasks to perform now
      • Bronze birch borer treatments
      • Shearing pines
    • Timely topics
      • Treehoppers
      • Armillaria root disease
      • White pine blister rust
    • E-samples
      • Common buckthorn identification
      • Emerald ash borer (Illinois)
      • Honeylocust borer
      • Flathead appletree borer
      • Male cones on conifers
      • Tent caterpillars
  • May 25, 2016
    • Plant Development
    • Tasks to perform now
      • Cedar-apple rust treatments on apples
      • Codling moth and plum curculio treatments
      • Bronze birch borer treatments
    • Tasks to do in a week or two
      • Shearing pines
    • Timely Topics
      • Frost damage on ash and hackberry trees
      • Ash anthracnose
      • Emerald ash borer has NOT been detected in the state
      • Lecanium scales are producing honeydew
    • E-samples
      • Buckeye blotch
      • Peach leaf curl
      • Weeds - common mallow and field pennycress
  • May 18, 2016
    • Plant Development
    • Tasks to perform now
      • Cedar-apple rust treatments on apples
      • Codling moth treatments
      • Pine needle scale treatments
    • Tasks to do in a week or two
      • Bronze birch borer treatments
    • Timely Topics
      • Frost damage on trees
      • Cedar-apple rust galls on junipers
      • Oystershell scale
    • E-samples
      • Maple bladder galls
      • Pine tortoise scale
  • May 11, 2016
    • Plant Development
    • Tasks to perform now
      • Clearwing ash borer treatments
      • Spruce needlecast treatments
    • Tasks to do in a week or two
      • Codling moth treatments
      • Pine needle scale
    • Timely Topics
      • Mushroom hunting
    • E-samples
      • Galls on junipers
      • Crown rust
  • May 4, 2016
    • Plant Development
    • Tasks to perform now
      • Clearwing ash borer treatments
      • Diplodia tip blight treatments
      • Zimmerman pine moth treatments
    • Tasks to do soon
      • Spruce needlecast treatments
    • Timely Topics
      • Seed crop on elms
    • E-samples
      • Alcohol Flux
      • Sunscald on maple
  • April 27, 2016
    • Plant Development
    • Tasks to perform now
      • Apple scab second application
      • Spruce spider mite treatment
    • Tasks to do soon
      • Clearwing ash borer treatments
    • Timely Topics
      • Bark beetle treatments in the Black Hills
      • Problems with spraying for bark beetles
    • E-samples
      • Elm calligrapha
      • Redcedar in gardens
      • Winter burn on yews
  • April 13, 2016
    • Plant Development
    • Timely Topics
      • Buying nursery stock
      • Blueberies
      • Training young trees
    • E-samples
      • Ash flower gall mite
      • Mushrooms in lawns
      • Sapsuckers
  • April 6, 2016
    • Plant Development
    • Timely Topics
      • Tent caterpillars
    • E-samples
      • Discolored Scotch pine
      • Split elm trunk
      • Poor pruning on a silver maple
  • March 30, 2016
    • Plant Development
    • Timely Topics
      • Spring fruit tree treatments
    • E-samples
      • Black knot
      • Cedar-apple rust galls
      • Juniper pollen cones
  • March 23, 2016
    • Plant Development
    • Timely Topics
      • Pruning competing leaders in young spruce
    • E-samples
      • Crown gall on cherry
      • Aspen twiggall fly
  • March 16, 2016
    • Timely Topics
      • Stump grinding
    • E-Samples
      • Pine needle scale
      • Aspen heart rot
  • March 9, 2016
    • Timely Topics
      • Walnut syrup
    • E-samples
      • Borers in trees
  • March 2, 2016
    • Timely Topics
      • Pruning out fire blight
      • Pruning shrubs
    • E-samples
      • Bur oak, galls and woodpeckers
      • Browsing on pine needles
  • February 17, 2016
    • Timely Topics
      • What to do about bunny damage
    • E-samples
      • Sunscald on maple
      • Topped silver maple
  • February 3, 2016
    • Timely Topics
      • Maple sap may be flowing soon
      • Tent caterpillars egg mass removal
      • Fruit tree pollination requirements
      • Forcing flowering shrubs to bloom indoors (did it work)
    • E-samples
      • Bagworms in spruce tree
  • January 20, 2016
    • Timely Topics
      • Now is the time to order bare-root stock from your districts
      • Forcing flowering shrubs to bloom indoors
    • E-samples
      • Possible emerald ash borer infestations (in New York)
      • Pine tips littering the ground
  • January 6, 2016
    • Timely Topics
      • Celebrate the Winter! Some plants with winter interest
      • A sign of spring: red oaks are shedding their leaves
      • Will the cold hurt my trees?
    • E-samples
      • Hackberry witches'-broom

2015 Alerts

  • December 16, 2015
    • Timely Topics (Oh Deer! How to reduce damage to woody plants)
    • E-samples (leaf-footed bugs in home)
  • December 2-9, 2015
    • Timely Topics (sunscald and frost cracks on ornamental trees)
    • E-samples (Ichneumon wasps; pine bark adelgid)
  • November 18-25, 2015
    • Timely Topics (finding the perfect Christmas tree)
    • E-samples (moving mountain pine beetle in firewood)
  • November 4-11, 2015
    • Timely Topics (ash yellow; Jack pine as a landscape tree; diplodia tip blight)
    • E-samples (apple identification; euonymus aerial rootlets; pine wilt; sapsucker injury on pine)
  • October 21-28, 2015
    • Timely Topics (buying firewood)
    • E-samples (bark lice; boxelder borer; juniper broom rust)
  • October 7-14, 2015
    • Timely Topics (fall color; fall color on evergreens)
    • E-samples (ash seed weevil; color change on arborvitae; termites)
  • September 23, 2015
    • Timely Topics (chestnuts versus buckeyes; lightning struck trees)
    • E-samples (dogwood sawfly)
  • September 16, 2015
    • Timely Topics (oak leaf blister; why is the ground so "sappy" beneath my pine?)
    • E-samples (ash anthracnose on black ash; leaf crumpler on cotoneaster)
  • September 9, 2015
    • Timely Topics (why are the leaves discolored and falling off my aspen, cottonwood or poplar tree?)
    • E-samples (oak leaf blister; hedgehog gall on oak)
  • September 2, 2015
    • Timely Topics (eating the fallen "chestnuts;" mighty trees from small acorns; what about BOB?)
    • E-samples (frogeye)
  • August 26, 2015
    • Timely Topics (harvest walnut for seeds and food; fall webworm; common buckthorn fruit - DO NOT EAT)
    • E-samples (fasciation on spirea; melampsora on cottonwood; septoria on dogwood; tar spot on maple)
  • August 19, 2015
    • Plant Development
    • Timely Topics (verticillium wilt; stem girdling roots)
    • E-samples (ash bark beetle; ground beetles; walnut anthracnose; sulphur fungus)
  • August 12, 2015
    • Plant Development
    • Timely Topics (fall webworm; mountain pine beetle)
    • E-samples (elm sawfly; fireblight on cotoneaster; oak anthracnose)
  • August 5, 2015
    • Plant Development
    • Timely Topics (Willow blight; Ants & trees)
    • E-Samples (Golden soldier beetle; Tar spot on maple; Wooly oak gall)
  • July 29, 2015
    • Plant Development
    • Timely Topics (why is my pine turning brown at the tip? {diplodia tip blight}; why is my spurce turning brown? {spruce spider mite})
    • E-samples (plant identification for jams and jellies; pear slug; bacteria leaf spot; hawthorn rust)
  • July 15, 2015
    • Plant Development
    • Timely Topics (Dutch elm disease; locust borer)
    • E-Samples (fireblight)
  • July 8, 2015
    • Plant Development
    • Pest Treatments to be done now (apple maggot)
    • Timely Topics (pine wilt disease; emerald ash borer - and it has NOT been found in South Dakota)
    • E-samples (ash leaf curl aphid; ash rust; cedar-apple rust; cedar-quince rust; cholorosis on river birch; cottonwood twig shedding and petiole gall; frogeye on apple; hormonal herbicide injury; honeylocust podgall midge)
  • July 1, 2015
    • Plant Development
    • Pest Treatments to be done soon (apple maggot)
    • Timely Topics (why are the lower branches dying on my blue spruce; tree damage with the recent storm)
    • E-samples (ash rust; dog vomit fungus; elm sawfly; plum pocket)
  • June 24, 2015
    • Plant Development
    • Pest treatments to be done now (spruce bud scale; spruce needleminer)
    • Timely Topics (ash leaf curl aphid; Dutch elm disease is beginnins to show up across the state; elm leaves are turning yellow due to scales as well as DED)
    • E-samples (red turpentine beetle; herbicide injury on lilac; venturia leaf and shoot blight)
  • June 17, 2015
    • Plant Development
    • Pest treatments to be done now (spruce bud scale; spruce needleminer)
    • Timely Topics (why are my tree's leaves turning yellow?)
    • E-samples (cottony maple scale; fireblight; hackberry galls; spiny elm caterpillars; wooly elm aphid)
  • June 10, 2015
    • Plant Development
    • Pest treatments to be done now (dothistroma needle blight)
    • Timely Topics (Voles, voles, and more voles)
    • E-samples (aphids, ash rust, cedar-apple rust, poplar bud gall, redheaded ash borer, woolly elm aphid)
  • June 3, 2015
    • Plant Development
    • Pest treatments to be done now (dothistroma needle blight)
    • Timely Topics (herbicide damage to windbreaks; silver and Freeman maples looking a little thin)
    • E-samples (maple bladder gall; peach leaf curl; spruce gall adelgids; vole damage in cedars)
  • May 27, 2015
    • Plant Development
    • Treatments (codling moth; shearing pines; phomopsis twig blight)
    • Timely Topics (ash anthracnose; hackberry leaf drop)
    • E-samples (buckeye rust; basswood mites)
  • May 20, 2015
    • Plant Development
    • Treatments (diplodia tip blight; spruce spider mite; Zimmerman pine moth)
    • Timely Topics (cedar-apple rust; leaves injured by cold weather)
    • E-samples (European elm scale; pine tortoise scale; pine sawfly)
  • May 13, 2015
    • Plant Development
    • Treatments (ash-lilac borer, cedar-apple rust, tent caterpillars)
    • Timely Topics
      • What will happen to freeze-damaged leaves?
      • Caring for young trees damaged by the recent storms
      • What to do with mature trees damaged by the storms
      • Use caution when removing storm-damaged trees
    • E-samples (sapsucker damage to lindens, winter-kill on spireas)
  • April 29, 2015
    • Plant Development
    • Treatments (ash-lilac borer; apple scab; cedar-apple rust; spruce needleminer; tent caterpillars)
    • Timely Topics (pollinating a single apple tree; managing cedar-apple rust on cedars {junipers}; treatments for mountain pine beetle and pine engraver beetle)
    • E-samples (browning evergreens; bed borers!)
  • April 22, 2015
    • Plant Development
    • Timely Topics (watering trees during drought; black "buds" on the ground beneath ash trees)
    • E-samples (bronze birch borer; cedar-apple rust; wild cucumber vine)
  • April 15, 2015
    • Plant Development
    • Timely Topics (pine engraver beetles are flying; planting bare-root trees; phomopsis spruce decline)
    • E-samples (tent caterpillar - time ro remove the nests; black knot)
  • April 8, 2015
    • Timely Topics (time to treat for apple scab; walnut toxicity to nearby plants; planting trees on old feedlots)
    • E-samples (spacing for Colorado spruce in a tree belt; banded ash borer exit holes)
  • April 1, 2015
    • Timely Topics (pruning flowering shrubs)
    • E-samples (banded ash borers are flying; desiccation injury on spruce; gall wasps on oak)
  • March 18, 2015
    • Timely Topics (it's maple syrup time again!)
    • E-samples (cedar-apple rust)
  • March 4, 2015
    • Timely Topics (emerald ash borer symposium, pruning young fruit trees)
    • E-samples (vole damage)
  • February 18, 2015
    • Timely Topics (emerald ash borer symposium)
    • E-samples (yellowing Schotch pines)
  • February 4, 2015
    • Timely Topics (oak gall and woodpeckers - a lethal combination)
    • E-samples (deer damage to pines)
  • January 21, 2015
    • Timely Topics (ash substitutes in windbreaks)
    • E-samples (porcupine and squirrel damage to trees)
  • January 7, 2015
    • Timely Topics (tips on buying firewood)
    • E-samples (rabbit damage to trees)

2014 Alerts

  • December 24, 2014
    • Timely Topics (winter icing damage to trees)
    • E-samples (witches' broom on hackberry)
  • December 17, 2014
    • Timely Topics (winter watering)
    • E-samples (pigeon tremex and silver maples)
  • December 3, 2014
    • Timely Topics (use of ice melting products)
    • E-samples (buckeyes not chestnuts; Scotch pines turning color)
  • November 19, 2014
    • Timely Topics (finding the perfect Christmas tree)
    • E-samples (Parson spider; blowfly maggots)
  • October 29, 2014
    • Timely Topics (what to do about deer)
    • E-samples (apple mealybug)
  • October 15, 2014
    • Timely Topics (water your evergreens now to reduce winterburn injury; tent caterpillar control begins now)
    • E-Samples (ash seed weevils; bark lice; decay fungus on a maple and southwest disease)
  • October 1, 2014
    • Timely Topics (what causes leaves to turn color in the fall; What is wrong with my apples)
    • E-samples (mulberry identification; apple russetting; powder post beetle)
  • September 24, 2014
    • Timely Topics (fall needle color change on evergreens)
    • E-samples (puffball and sulphur fungi)
  • September 17, 2014
    • Timely Topics (be careful what you pick for fruit)
    • E-samples (cotoneaster leaf crumpler; cotoneaster identification; plum curculio in plum)
  • September 10, 2014
    • Timely Topics (freeze injury on apple fruit; did the cold kill the mountain pine beetle?)
    • E-samples (bacterial blight of lilac; fall webworm; honeysuckle aphid)
  • August 27, 2014
    • Timely Topics (what about BOB? -Bur Oak Blight)
    • E-samples (fall webwork; septoria leaf spot on dogwood)
  • August 20, 2014
    • Timely Topics (poison ivy reminder; a leaf spot disease of ash)
    • E-samples (brown felt blight on spruce; earwigs)
  • August 8, 2014
    • Timely Topics (Squirrel damage to hackberries)
    • E-samples (hackberry island chlorosis; leafcutter bees; walnut anthracnose)
  • July 30, 2014
    • E-samples (mites on viburnum; saltcedar in bloom; tar spot appearing)
  • July 23, 2014
    • Timely topics (herbicide drift claims)
    • E-samples (ash and privet borer; chokecherry midge; Dutch elm disease; fireblight; plum curculio)
  • July 14, 2014
    • Timely topics (leaf fall on cottonwoods; poplar gall aphids; willow cone gall midges)
    • E-samples (Tartarian honeysuckle fruit; pear scab; mildew on oaks)
  • July 7, 2014
    • Timely topics (ash leaf curl aphid; cedars - what is going on with them; Dutch elm disease; powdery mildew)
    • E-samples (ash and privet borer; anthracnose)
  • July 1, 2014
    • Timely Topics (cedar dieback update; apple maggot)
    • E-samples (maple bladder gall; plum pockets; dog vomit fungus)
  • June 25, 2014
    • Timely topics (bumps on trees, maple bladder gall, and plum pockets; cedars dying in central South Dakota)
    • E-samples (shothold diseases of chokecherry; clearwing ash borer pupae; winter injury on birch)
  • June 18, 2014
    • SD Dept. of Agriculture new Log Finder website
    • Timely topics (clearwing ash borers are flying)
    • E-samples (trees planted by the squirrels; boxelder gall midge; ash rust; crown rust on buckthorn)
  • June 11, 2014
    • Timely topics (tasks to be completed now: clearwing ash borer, codling moth; Problems with ash, frost, glyphosate and hail; Hackberry leaf tatters)
    • E-samples (winter kill on yews, Zimmerman pine moth)
  • June 4, 2014
    • Timely topics (tasks to be completed now: clearwing ash borer, mountain pine beetle)
    • E-samples (apple scab, apricot scab, chlorosis on trees, cryptosphaeria canker on aspen)
  • May 28, 2014
    • Timely topics (tasks to be completed now: apple scab treatments, diplodia tip blight, tasks to do soon: clearwing ash borer, what's up with ash, woodpecker damage on oak continues)
    • E-samples (white snowberry identification, junipers (cedars) turning brown, cytospora canker in blue spruce)
  • May 14, 2014
    • Timely topics (tasks to be completed now: apple scab treatments, tasks to do soon: clearwing ash borer, diplodia tip blight, spurce spider mites and zimmerman pine moth.)
    • E-samples (ash flowers falling, elm seeds falling, mushrooms in the lawn)
  • May 7, 2014
    • Timely topics (tasks to be completed now: apple scab treatments, tasks to do soon: clearwing ash borer, zimmerman pine moth)
    • E-samples (pine needle scale, wetwood, alcoholic flux)
  • April 23, 2014
    • Timely topics (tasks to be completed now, current concerns)
    • E-samples (spruce losing bark, borer in silver maple)
  • April 9, 2014
    • Timely topics (winterburn on evergreens)
    • E-samples (algae, lichens and moss, winterburn on spruce)
  • March 26, 2014
    • Timely topics (it is maple syrup time, what to do about rabbit damaged trees)
    • E-samples (banded elm bark beetles, leaning pines)
  • March 12, 2014
    • Timely topics (Korean fir - a tree worth trying, winter desiccation injury on pines in the Black Hills, mountain pine beetle update)
    • E-samples (elytroderma needle cast)
  • February 26, 2014
    • Timely topics (the winter cold and our trees and shrubs, the winter cold and moutain pine beetle/emerald ash borer, common hoptree is anything but common.)
    • E-samples (carpenter ants, rabbit damage to trees)
  • February 12, 2014
    • Timely topics (emerald ash borer update, which holds up better, red or yellow fruit on a crabapple)
    • E-samples (lilac identification, what killed the maple)

2013 Alerts

  • December 2013
    • Timely topics (the tree book is out)
  • November 13 - 20, 2013
    • Timely Topics (the tree book is out, finding the perfect Christmas tree)
    • E-samples (cotoneaster identification)
  • October 30 - November 6, 2013
    • Timely Topics (ash trees are "raining" worms)
    • E-samples (blemishes on applies, puffballs)
  • October 16-23, 2013
    • Timely Topics (firewood)
    • E-samples (chokeberry identification, oak galls, pine needle scale)
  • October 2-9, 2013
    • Timely Topics (snow storm tree damage in the Black Hills, autumn needle drop and evergreens, first annual wood utiliziation workshop Oct. 12 in Brookings)
    • E-samples (horntails still be found in trees, Ussurian pear fruit)
  • September 18-25, 2013
    • Timely Topics (emerald ash borer discovered in Colorado, autumn needle drop and evergreens, first annual wood utilization workshop Oct. 12 in Brookings)
    • E-samples (melampsora leaf rust, tar spot, horntails found in trees and stumps)
  • September 11, 2013
    • Timely Topics (fall color season is almost here)
    • E-Samples (barklice, carpenterworm in ash, fall webworm nests)
  • September 4, 2013
    • Timely Topics (ash and other trees beginning to turn yellow, spruce showing drought stress, a correction to the August 19 Update)
    • E-Samples (ash borer in lilac, sulfur yellow fungi)
  • August 28, 2013
    • Timely Topics (better begin waterting now)
    • E-samples (European flea weevil on elm, willow scab, common chokecherry identification, common buckthorn - a plant NOT to confuse with chokecherry)
  • August 19, 2013
    • Timely Topics (a great year for apricots and peaches)
    • E-samples (willow blight, herbicide injury and trees, ash flower gall mite, leaf cutter bees)
  • August 12, 2013
    • Timely Topics (plant development, verticillium wilt of catalpa, cedar bark beetles are flying)
    • E-samples (linden leaf blotch, cytospora canker on stone fruit, frogeye disease on apple)
  • August 5, 2013
    • Timely topics (plant development, why are the leaves turning color)
    • E-samples (mulberry identification, witches' broom on hackberry, tar spot on maples)
  • July 31, 2013
    • Timely topics (plant development)
    • E-samples (mulberry identification, lecanium scale, pine needle scale, sawyer beetles in pines)
  • July 24, 2013
    • Timely topics (plant development)
    • E-samples (apple maggot, apple scab, cedar-apple rust, fruit cracking on apples, anthracnose on raspberries, picnic beetles in raspberries, giant willow aphid)
  • July 17, 2013
    • Timely topics (plant development, cottonwood "cotton" confused with webbing for spider mites)
    • E-samples (black chokeberry, chlorotic maples)
  • July 10, 2013
    • Timely topics (plant development, what to treat now: apple maggot)
    • E-samples (ash flower gall, ash leaf curl aphid, black knot, powdery mildew)
  • July 4, 2013
    • Timely topics (plant development, what to treat now: apple maggot, information you can use: mountain pine beetles are beginning to fly)
    • E-samples (aphids, pine sawflies, poplar vagabond aphid)
  • June 17, 2013
    • Timely topics (plant development, what to treat now: spruce bud scale, spruce needleminer, information you can use: why are spruce dying across the state, dutch elm disease symptoms are appearing)
    • E-samples (apple scab, cottonwood petiole gall, leaf blotch disease of buckeye, procerum root disease of white pine)
  • June 12, 2013
    • Timely topics (plant development, what to treat now or soon: spruce bud scale, spruce needleminer, information you can use: stinger to kill broadleaf weeds in conifer belts)
    • E-Samples (cedar-apple rust, cicadas, hackberry tatters, hound's tongue)
  • June 5, 2013
    • Timely topics (plant development, what to treat now or soon: mountain pine beetle treatments)
    • E-Samples (browning arborvitae, dieback on maples, ash rust, crown rust, hackberry tatters)
  • May 29, 2013
    • Timely topics (plant development, what to treat now or soon: codling moth, shearing pines, juniper twig blight)
    • Problems seen in the field (shot-hole disease of apricot)
    • E-Sampes (identification of common chokecherry, dying spruce, European pine sawfly)
  • May 22, 2013
    • Timely topics (plant development, what pests to treat soon: second treatment of apple scab, clearwing ash borer, diplodia tip blight, spruce spider mites)
    • E-samples (cedar-apple rust, curled spruce tips, diplodia tip blight, mossy rose gall)
  • May 15, 2013
    • Timely topics (plant development, what pests to treat soon: clearwing ash borer, diplodia tip blight; Is it ok to use fresh wood and bark mulch in the landscape)
    • E-samples (elm seed crop, spruce bud scale and ants, spruce declining, junipers covered with windblown soil)
  • May 8, 2013
    • Timely topics (plant development, what pests to treat now: apple scab, tent caterpillars, Zimmerman pine moth; what pests to treat in another week or so: clearwing ash borer, diplodia tip blight)
    • E-samples (cedartree borers, drought-stressed spruce, people as pests)
  • May 1, 2013
    • Timely topics (plant development, treating for apple scab, treating for tent caterpillars, treating for Zimmerman pine moth)
    • E-samples (cedar bark beetles in central South Dakota, banded ash borer appearing in homes, rabbit damaged trees: can they be saved)
  • April 24, 2013
    • Timely topics (the winter continues, treating for apple scab is coming up soon, update on pine bark beetles, problems occurring with spraying for bark beetles)
    • E-Samples (winter burn on evergreens)
  • April 17, 2013
    • Timely topics (the winter continues, what does this continued cold weather do to plants, ice storm follow-up)
    • E-Samples (bunnies in the belts, cytospora canker on spruce, gummosis on Prunus)
  • April 10, 2013
    • Timely topics (the ice storm and trees, Is honeycrisp a good apple, substituting lime sulfur)
    • E-samples (squirrels in pines, squirrels in elms)
  • April 3, 2013
    • Timely Topics (how many trees do I need to have fruit, fertilizing seedling trees)
    • E-samples (voles in junipers, squirrels in elms)
  • March 20, 2013
    • Timely Topics (pine engraver beetles, fertilizing seedling trees)
    • E-samples (bronze birch borer)
  • March 6, 2013
    • Timely Topics (making maple syrup, trees for abandon feedlots)
    • E-samples (vole injury to trees)
  • February 6, 2013
    • Current Concerns (comon ash borers and bark beetles)
    • E-samples (zimmerman pine moth, deer damage caragana)
  • January 23, 2013
    • Current Concerns (is this cold weather going to harm trees, gold in them thar trees)
    • E-samples (yellow foliage on scotch pines)
  • January 9, 2013
    • Current Concerns (rabbits are out in force, imprelis tree injury update)
    • E-samples (horned oak gall, sawyer beetle pine wilt)