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CSU Extension - A division of the Office of Engagement. Providing trusted, practical education to help you solve problems, develop skills and build a better future.
Established 1908

Extension is dedicated to serving current and future needs of Coloradans by providing educational information and programs that safeguard health, increase livelihood, and enhance well being.

HPAI - New Cases have been confirmed in our region

Highly Pathogenic Avian Influenza (HPAI) is a highly contagious and fatal foreign animal disease in domestic poultry. Wild birds serve a s reservoir for influenza viruses and can spread these viruses to poultry. There have been confirmed cases in La Plata County and Montrose County, so flock owners should prepare by following increased biosecurity measures.

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Alfalfa Weevil

A number of insect pests attack alfalfa in Colorado. One of the most important is the alfalfa weevil (Hypera postica), which has been a problem in most alfalfa-producing areas of the state since the early 1900s. Losses from this insect vary from year to year, but in some seasons they can be large enough to justify the application of an insecticide. The key to economical management of the alfalfa weevil is combining crop management practices, biological control and the use of insecticides only when weevil numbers are high enough to ensure that yield benefits outweigh treatment costs.

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Aphids on Shade Trees & Ornamentals

Aphids are the most common insects found on trees, shrubs, and garden ornamental plants. Over 350 different aphid species occur in the state but most can feed on only a few species of plants. However, with so many kinds of aphids, few plants grown in Colorado do not support at least one aphid. Most species rarely injure plants or even attract attention, but a few aphid species do cause problems (Table 1). Aphids feed by sucking sap from plants. When the number of aphids on a plant are very high for an extended period, their feeding can cause wilting and sometimes even dieback of shoots and buds. Some aphids can cause leaf curling when the insect infests emerging leaves. Sometimes problems with aphids do not primarily involve plant injury but instead their production of sticky honeydew. Honeydew is the waste material excreted by aphids and certain other phloem-sucking insects (e.g., soft scales, whiteflies, some leafhoppers). It may cover leaves, branches, sidewalks and anything that lies beneath a infested plant material. Grayish sooty mold grows on the honeydew, further detracting from plant appearance. Ants, yellowjacket wasps, flies, and bees are usually attracted to plants that are covered with honeydew.

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