Pest & Disease Control

Mar 14, 2022

Posted by | Comments Off on Brown patches in Turf!…Spider Mites!

Brown patches in Turf!…Spider Mites!

Brown patches in Turf!…Spider Mites!

We are finding that a lot of people think their brown areas or dead patches are from winter kill due to low moisture…We are finding the dead areas are mostly due to Spider Mites!

What are they & What do they do?…Quick Facts…

  • Many feel spider mites are the most destructive pests for turf in Colorado.
  • Several species of spider mites can damage turf grass in Colorado: clover mite, Banks grass mite and brown wheat mite.
  • Most damage occurs during early to mid-spring.
  • When most people see the damage begin, they often believe they are having watering problems with their sprinkler system.
  • The damage appears as dry areas or brown spots in turf, predominately on the south & west sides of foundations, walls, patios, rock beds, trees, etc. If you look closer at the damaged grass it appears gray in color. If you look at the dead blades of the grass, you can see tiny black spots on the grass…that is where the mites have leached onto the grass and sucked the life out of it.
  • Damage can range from a few dry areas to total destruction of the lawn.
  • Many people who have problems with turf growing… do not know they have spider mites on their property & will continue to over water to try to get these problem areas to grow.  Most blame it on soil conditions, hot sides of the house, winter kill, acid from needles of pine trees, etc.
  • Some who have severe damage or hard to grow areas will replace their sod when a simple plan of mite control along with some TLC will revive a majority of their turf.

Treatment for Spider Mites!

  • Most turf usually requires two mite control applications.  Call us for a free Quote! Applications usually start around $75 and go higher for more severely damaged lawns. Unlike some companies we treat beyond the damaged areas. We treat where the mites have moved onto such as the good turf & also the bed and border areas.

brown areas

Severe mite & drought damage. Mites can leave severe damage over time if left untreated.

dead patches

Brown patches in Turf

Minor mite damage on hot side of tree.

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Mar 22, 2021

Posted by | Comments Off on Necrotic Ring Spot (NRS) –

Necrotic Ring Spot (NRS) –

Lawn Care

Necrotic ring spot symptoms may initially develop as light green to straw-colored rings or frog eyes in lawn. Photo from CSU Website.

Quick Facts…

  • Necrotic ring spot is caused by a fungus & is a perennial disease of Kentucky bluegrass.  It is considered one of the most common diseases of turf along the front range & the most destructive. Symptoms often develop in late summer.
  • NRS results in irregular circular shapes or Patches sometimes referred to as “frogeye”.  Shapes can range from several inches to several feet in size.  They can be localized or widely scattered throughout the yard.
  • NRS is one of the most widely studied turf diseases however it is the least understood.   NRS may reappear and intensify in mid-summer in successive years and may take several years to control.

Treatment for NRS!

  • Treat with a fungicide. Apply application when fungus is active in spring and in fall.  Apply a second application about 2 – 4 weeks after first one.  A third application may be necessary on severely damaged lawns.  Lightly water the fungicide into the turf (less than ¼ inch) but do not drench the lawn. Fungicide applications only suppress NRS; they do not eradicate the NRS fungus.  Therefore applications over several years may be necessary to manage NRS on severely damaged lawns.
  • Where to get fungicide.  While these products are not restricted use they for the most part are not are not packaged for sale at retail outlets. Therefore, these fungicides are usually applied by professional lawn care operators.  Call us for a free Quote!  Applications usually start around $55 and go higher for more severely damaged lawns.
  • Prepare soil properly before sodding or seeding.
  • Over seed diseased patches with resistant grasses.
  • Do not overwater. Water turf deeper & less often, usually no more than 2 – 3 times a week, without creating water stress.
  • Keep a good turf height. Mow lawn at a height of 2 ½ to 3 inches. Remove no more than 1/3rd of the blade at any one mowing.  Mulching may actually help turf recovery by recycling nitrogen during the leaf decomposition process.
  • Core aerate established lawns at least once a year (spring or fall) to help reduce thatch buildup and improve soil drainage. Core aeration equipment may spread the NRS fungus although this is not likely a major means of pathogen movement. Furthermore, the benefits of aeration outweigh potential problems.
  • Avoid applying excessive amounts of nitrogen fertilizer.Applications of more than 4 lb total nitrogen per 1000 square feet per year may enhance NRS. Timing of fertilizer applications is as important as the total amount applied.


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Mar 19, 2021

Posted by | Comments Off on Bugs to look for in Late April

Bugs to look for in Late April

Bugs to look for in Late April

Household Insects

Late April

Household Insects

Ants:  Foraging ants in homes are common until temperatures allow them to seek food outdoors.

Tree/Shrub Insects

Cooley spruce gall:  Insects continue development and usually begin to produce egg sack in late April.

Lilac/ash borer: Flights of adult moths may begin.

Poplar twiggall fly: Adults emerge and begin to lay eggs in emerging aspen shoots.

Spider mites on pines:  Populations may increase rapidly on ponderosa and other susceptible pines

Spiny elm caterpillar:  Small colonies of these caterpillars may be seen on willow, hackberry, aspen, elm and other trees.

Douglas-fir beetle:  In forested areas, adult emergence, flights and tree attacks may begin.

Brownheaded ash sawfly:  Adults may lay eggs during warm days following bud break.

Zimmerman pine moth:  Approximate treatment timing for overwintered larvae. 


Turfgrass mites:  Clover mites continue to feed on lawns and enter homes in nuisance migrations.

Nightcrawlers: Tunneling activities and associated lawn lumps continue.

Midges: Non-biting midges emerge from ponds and mating swarms may be observed over lawns.


Spinach leafminer: Egg laying and tunneling begins in older spinach foliage.

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Aug 23, 2018

Posted by | Comments Off on Pest & Disease Control

Pest & Disease Control

Spider Mites

Necrotic Ring Spot (NRS)


Fairy Ring

Grub Worm

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Feb 16, 2015

Posted by | Comments Off on Ascochyta




Quick Facts…

  • Ascochyta is a fungus that is usually just an aesthetic problem on Kentucky bluegrass lawns in Colorado.  It may also occur on tall fescue and perennial ryegrass.
  • Leaves usually start dying back from the tips & severe areas of affected turf will turn straw-colored however your turf is not dead.
  • Ascochyta can occur throughout the growing season, but is more prevalent in the spring when there are extended wet periods symptoms may develop throughout the growing season but are more common when cool rainy conditions are followed immediately by hot dry conditions. The overall appearance of the disease may resemble drought stress, except that the symptoms of Asochyta blight appear quickly (i.e. sometimes overnight).
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Treatment for Ascochyta!

  • Reduce thatch and promote water penetration through the soil by aerating.
  • Sharpen blades & maintain grass height between 2 ½ and 3 inches. Avoid mowing during wet weather.
  • Although the fungus can be spread from one location to another on grass clippings it is unlikely to contribute significantly to disease development because the fungus is already present throughout every lawn.
  • Maintain a balanced fertilizationprogram.
  • Try to maintain uniform soil moisture. Check your sprinkler system to make sure all sprinkler heads are working properly and that water is being distributed uniformly to avoid drought stress. On the other hand excessive irrigation and poorly drained soils may also promote disease development.
  • The damage usually takes several weeks to disappear.
  • If you can’t wait, a fungicide can speed up the healing process especially on more severely damaged lawns…Call us for a free evaluation!

Bleached leaf

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Bleached leaf tips and banding are characteristic of Ascochyta leaf blight.

Ascochyta leaf blight

Ascochyta leaf blight on Kentucky Bluegrass

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Feb 14, 2015

Posted by | Comments Off on Grub Worm

Grub Worm

Quick Facts…

We see Grub damage way less often than other turf damages such as spider mites.

Grubs are a root-feeding immature (larval) stage of beetles, which include the following: Japanese beetle, European chafer, masked chafer, Oriental beetle, green June beetle and the Asiatic garden beetle.

The beetles lay their eggs 1 to 2 inches deep in the soil and the eggs hatch in 2 to 4 weeks.  The young grubs begin feeding on grass roots immediately.  They grow to full size within 3 to 4 weeks.  This is their most damaging time to the turf.  The grubs move deep in the soil for hibernation just before winter arrives.  They come back to the root zone and start eating again in the spring.

Around May, depending on your location, the grub transforms into pupae and a few weeks later they emerge as adult beetles.

Their most visible damage can be seen in the late summer months when the turf is most stressed.

Severe infestations may see numbers of up to 50 grubs per square foot.  Your turf will roll back like carpet & your lawn will yellow and die quickly.

Treatment for Grub Worms!

Usually grub worms are not that large in numbers to severely damage your lawn, so just let nature take its course.

If there are large numbers, insecticides may be necessary to control them. Applications should be done when they are close to the soil surface and before they have damaged the lawn.

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