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August News

Make your “To Do” list for fall
As we approach fall, it’s important to look at what your landscape needs in order to get ready for winter.

  • Your trees are your most important asset and getting them pruned “before the snow flies” is first on the list.
  • Get your sprinkler system checked and turned off
  • Fall fertilization for your lawn
As always, helping you take care of your property is our first priority, so call our office this month and let’s get you in the fall schedule.

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Japanese Beetle Damage
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Japanese Beetle update in Denver

The Japanese Beetle appears to have become a resident of Colorado, and more specifically in the southern metro area. Through our monitoring program, we have already surpassed the captured population of 2012 up to early August. With the recent rainfall, and a surplus of susceptible plant material, it is reasonable to expect the population will be sustained through the end of this season.

Damage from the adult Japanese Beetle is evident in the skeletonizing of leaves and flowers. The top 10 plants that are palatable to the Japanese Beetle are: 1) Roses, 2) Virginia Creeper, 3) Grapes, 4) Lindens, 5) Plums, 6) Oaks, 7) Birch,
8) Cherries, 9) Rose of Sharon, and 10) the American Elm.

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Japanese Beetle
Adult beetles are strong fliers, which has greatly contributed to their spread from Centennial all the way west to Littleton. The beetle’s north to south distribution extends from 8th Avenue all the way south to just below Orchard Road. The movement of new plant material appears to be less impactful to the spread of the beetle than the ability of the adult to fly distances.

Achieving control over the Japanese Beetle population is very difficult. The insect’s ability to fly and their hard elytra (hardened outer wings) make control through insecticide treatments difficult. Treatments for controlling adult and larval stages include the following:
  1. Soap and/or Horticultural Oil (adult stage)
  2. Imidacloprid (adult or larva)
  3. Bifenthrin (adult)
  4. Milky Spore (larva)
  5. Parasitic Nematode (larva)
  6. Acelepryn (adult or larva)
  7. Acephate (adult)

Monitoring the adult population through the use of pheromone traps is very helpful in determining the peak of the adult stage and deciding the best time for treatments.

Contact us and we'll send out an Arborist to recommend the appropriate treatment.

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Dollar Spot Disease
(Photo source: apsnet.org)
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Dollar Spot Disease in Lawns

Dollar spot initially was a major concern on bent grass where it forms spots the size of silver dollars, hence the name "dollar spot." However, on Kentucky bluegrass lawns the fungi may infect large areas in just a few days. Infected areas four inches or larger may run together, causing large patches. Irregular patches up to twelve feet wide are not uncommon on bluegrass lawns.


Quick Reference:
  • Dollar spot is making a comeback as rain and humidity have finally returned to the front range.
  • Dollar Spot is often confused with Ascochyta leaf blight.
  • Lawns under stress are more susceptible to infection.
  • Proper lawn management, such as aeration, proper watering and fertilization, will reduce dollar spot problems.
Tree
AUGUST 2013
 
 

Mountain High Tree,
Lawn & Landscape

303.232.0666
5717 W. 11th Ave.
Lakewood, CO, 80214

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Mountain High Tree
Care & Consulting

719.444.8800

3450 Astrozon Place
Colorado Springs, CO 80910

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MHT ~ SEASONAL TOPICS
from Craig Little
Craig LittleBy August, we often begin to see the results of the intense Colorado sun in the form of Leaf Scorch, which appears as a distinct browning throughout the leaf tissue. Scorch is evident in the outer most tissue of the leaf canopy. Plants in full sun exposure are most susceptible. Species such as Burning Bush, Norway Maple, Japanese Maple, Roses, and Beech are some of the most susceptible to leaf scorch when planted in full sun.
   
 
TREE TOP TIMES
LAWN SPECIAL


50% OFF
Revive Treatment


Get your lawn fertilized this fall and SAVE 50% on a Revive treatment.

Call us at 303.232.0666 to schedule your service.

Good for new services only.
Expires 9/15/13

Refer a friend and get a $30 check!

We appreciate all of your referrals! Thanks for helping us grow!


In Colorado, this disease can also be a problem on annual bluegrass, Bermuda grass, fine-leaf fescues, perennial rye grass and zoysia grass.

Dollar spot fungi may be spread by mowers and other maintenance equipment. Maintaining clean equipment will help in preventing spreading.

Strains of dollar spot fungi grow within a wide range of temperatures, but tend to favor warm temperatures with higher humidity. However, most problems occur when temperatures are moderately warm and change rapidly, as with warm days and cool nights. Because this disease is serious for lawns during warmer weather, many misdiagnose this disease as lack of water. This can lead to overwatering in an attempt to correct the problem. When this happens, it can make the disease much worse.

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Dollar Spot Disease
(Photo source:
North Carolina State University)
Identification:

At first, affected leaves show yellow-green blotches or bands. These lesions gradually bleach the blades of grass to a white or straw color. On finer-textured grasses, individual lesions on the leaves often span the width of the grass blade, producing a constricted area resembling an hourglass. On coarser grasses, the spots caused by dollar spot may not span the blade. Unlike Ascochyta, the leaf damage is in the middle of the blades, not the tips.

Individual leaf blades may have a single lesion or many small lesions or be entirely blighted. Infected blades usually have a distinctive tan to purplish streak between the white and green portions of the blade. These white-banded blades are most evident between dead areas and green turf.

The tip of the leaf blade may show the characteristic lesion, or the lesion may be in the middle of the blade, leaving the leaf tip green. When grass is wet from early morning dew, a fine, white cobweb-like mycelial growth (strands of fungus) may be visible on diseased leaves. As the grass dries, the mycelium disappears. These can easily be confused with spider webs or the downy seed tufts of cottonwood trees.

Stress Factors


Grass under stress is more susceptible to dollar spot than is properly maintained turf. Low nitrogen fertilizer, improper mowing (frequency and height), excessive soluble salt (alkali) levels, and improper watering all make turf more susceptible to disease. Newly sodded or seeded lawns that receive heavy watering also are frequently attacked.

Infestations of chinch bugs, white grubs, billbug grubs and other soil-inhabiting insects may stress grass by eating plant roots. Dollar-spot infected areas may mask the more serious insect problem. Always check infected lawns and treat for insect pests.

Long periods of high humidity or free moisture within the foliar canopy of the grass may cause severe outbreaks. Watering turf at the wrong time may extend this susceptible period and increase the incidence of disease.

Heavy thatch layers may promote dollar spot because water, air and nutrients cannot penetrate to the underlying soil and grass roots. This results in shallow and poorly developed roots that are quite susceptible to drought stress. Thatch also ties up and reduces the effectiveness of pesticides. Two aerations per year are recommended for yards with history of lawn diseases for this reason.

Resistant Grasses

Seeding or sodding with two or more varieties of bluegrass may reduce the chance of losing the lawn to dollar spot. Bluegrass varieties demonstrate varying degrees of resistance.

Disease Management

Watering in the early morning, before 7AM, can often time wash the dew off the grass and reduce the spread of the fungi.

If you want to water later in the morning, allow grass to dry for at least one hour before watering it. When watering late in the day, allow time for grass blades to dry before nightfall.

In some cases, the over seeding of resistant varieties of the same type of grass into existing turf can reduce continued flair-ups. As disease kills susceptible varieties, resistant varieties fill in dead spots.

Fungicides & Treatment

If nitrogen fertilizer levels are properly managed, and other cultural stresses are reduced, the use of fungicides for dollar spot control in residential lawns is normally not required.

Dollar spot fungi have varying degrees of tolerance to common fungicides used to control them. Some fungicide-resistant strains of dollar spot have developed. A particular fungicide, therefore, may be effective at one time but not another. Also, fungicides may increase future insect and disease problems due to their effect on beneficial soil organisms (earthworms, microbes, etc.). Without these organisms, thatch does not decompose and the efficiency of pesticides is significantly reduced. Earthworms and other beneficial soil organisms, which help aerate soil and improve grass health, may be negatively affected by fungicides. In other words it is recommended to use fungicides only as a last resort where there is an established history of recurrent disease.

Contact us today and we'll send over a lawn technician to take a look at your lawn for signs of Dollar Spot or any other turf issues, and provide a plan for how to keep your lawn healthy and green.

Landscape
Montclair Community Garden – Mulch Donation in May

We shared with you a story in May about MHT’s donations of our Supreme Organic Mulch to the Montclair Community Garden and now…take a look at how these gardeners created a living, loving space in their neighborhood. Over 30 Monclair neighbors transformed a vacant plot of land into a productive, useful addition to their community. We always enjoy helping out when we can on projects like this. Nice Job!

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Jenny Sanchez
Get to know us!
Meet Jenny Sanchez

We at MHTS are proud to introduce Jenny Sanchez, our new Business Support Administrator for our Landscape and Irrigation Department. Jenny brings a wealth of industry experience, familiarity with our unique computer systems and an energetic and creative approach to providing support to our Landscape and Irrigation teams. We feel very fortunate to have her on our team.

When asked to tell us a little about herself, she responded:

“I was born in Denver Colorado on September 4th, coincidentally on the same day as my mother and grandmother. I am the second oldest of five children (2 girls and 3 boys). I am married with no children but look forward to expanding my family one day! I graduated with a degree in Business Management and I am constantly seeking education and stimulation to add to my life experience. I have several years of experience in the landscape and irrigation field and really look forward to starting a new chapter of my life at Mountain High.

I feel this is a great start to something long term and rewarding.

I'm grateful to be a part of such a great company and team!” We share your enthusiasm Jenny. Welcome aboard!

Mountain High Tree, Lawn & Landscape  | 5717 W. 11th Ave. | Lakewood, Colorado | 80214 | 303.232.0666
Mountain High Tree Service & Consulting
| 3450 Astrozon Pl. | Colorado Springs, Colorado | 80910 | 719-444-8800
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