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Tree Pest Alerts | South Dakota Department of Agriculture

Tree Pest Alerts

    • 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)