Content tagged "colorado"

What are the natural enemies of grasshoppers?

Updated: March 08, 2012

Grasshoppers face a host of predators including birds, rodents, spiders, skunks, several species of flies and horsehair worms--all that feed on grasshoppers....

What could be causing spots on the leaves of aspen trees and what is a recommended treatment?

Updated: February 14, 2012

Aspens are susceptible to many problems in the urban landscape. One of those problems is aspen leaf spot, a disease caused by fungus. Aspen leaf spot, or...

What is wrong with a lawn that has rings of dead grass; how can it be treated? I live in Colorado.

Updated: February 14, 2012

Necrotic ring spot, caused by the fungus Ophiosphaerella korrae, is one of several patch diseases that affect turf in the United States. For many years a...

Can diatomaceous earth be used to control flea beetles n the vegetable garden?

Updated: February 14, 2012

Diatomaceous earth is an inert substance--mostly silica in a very spiny arrangement. It is active as long as it remains in place, but because it is a dust,...

What do I spray my apple and pear trees with to control insects and diseases? I live in Colorado.

Updated: February 14, 2012

Homeowners are often surprised at the damage pests can do to apples. It is not easy to grow apples as pretty as those seen in the grocery store. There are...

What ground covers grow at high altitude? I live in Colorado.

Updated: January 05, 2012

The ideal ground cover plant forms a sufficiently dense mat of roots and foliage to reduce soil erosion, exclude weeds and provide an attractive, year-round...

Every year my garden has lots of a succulent leaved, low-growing weed with small yellow flowers. What is this weed and how do I eradicate it?

Updated: November 28, 2011

Purslane, Portulaca oleracea, is an annual, reproducing from seeds and stem pieces.  It has fleshy succulent leaves and stems with yellow flowers. They look...

Can I grow cactus outside in Denver, Colorado?

Updated: October 17, 2011

Yes. There are a variety of cacti that can be grown in Denver's climate. Here are a few tips to get you started. First on your agenda is to determine the...

What is wrong with a mature ponderosa pine with globs of sap on the bark on the main trunk and an overall gray-green color that is starting to turn brown?

Updated: October 17, 2011

A ponderosa pine with symptoms such as globs of sap on the trunk and a pale green color may be the result of invasion by mountain pine beetles, which...

What types of cactus will survive outdoors in Colorado?

Updated: October 16, 2011

Varieties of cactus that will thrive in Colorado include brittle prickly pear cactus, plains prickly pear cactus, ball cactus, and hedgehog cactus (also...

The leaves on my aspen tree are all sticky. What insects are doing this and is there a recommended treatment?

Updated: October 16, 2011

Dozens of species of aphids (plant lice) may be found on shade trees and woody ornamental plants in Colorado. Aphids feed on plants by sucking sap from the...

My aspen tree has little knobby growths all over the branches; what is it and how can it be treated?

Updated: October 16, 2011

Knobby growths on aspens are symptoms of twig gall, something particularly common in Colorado’s Front Range area. A gall is basically a growth that is...

What causes thin, patchy grass?

Updated: October 10, 2011

Thin grass is often a sign that;It is important to first diagnose the cause of the thinning lawn and proceed from there. Pest problems are usually the least...

Why do I need to use "tree wrap" on my newly planted trees?

Updated: October 02, 2011

"Tree wrap" is necessary for, not only newly planted trees but also thin barked trees, like soft maple, honeylocust and crabapples. Tree wrap is used to...

Will sprinkling gypsum on 'dog urine' dead lawn spots balance the pH and allow the grass to grow back?

Updated: September 30, 2011

Dog-urine spots in lawn are due to the high level of nitrogen in the dog urine; that is what burns the grass.  The urine doe not cause a high pH in the area....

How do daytime temperatures affect mosquito populations?

Updated: February 12, 2011

I want to prune my aspens. When is the best time of year and is there a certain way?

Updated: December 10, 2010

What could control cucumber beetles damaging zucchini and yellow squash plants without harming the several toads that are present in the vegetable garden?

Updated: July 28, 2010

How can I control locoweed?

Updated: July 26, 2010

What is the purpose of soil testing?

Updated: July 07, 2010

Can I compost plants covered with powdery mildew?

Updated: July 07, 2010

Are there any problems with using cedar chips as a mulch in the landscape?

Updated: July 06, 2010

What trees grow well at high altitude?

Updated: July 01, 2010

Why are my Pinyon Pine trees stressed and dying?

Updated: July 01, 2010

My ponderosa pine tree is dying. How can I save it?

Updated: June 30, 2010

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.