Pests Addressed

Gain new insights into your most difficult weeds and pests. Pests Addressed highlights a new pest or weed along with fun facts, product recommendations, and the most effective treatment techniques.

German Cockroach

December 2018

Although named the German cockroach, the most widespread cockroach pest in the world probably originated in Southeast Asia and expanded to urban areas through human travel and commerce. The first specimens to be identified may have been from Germany and assumed to be German. However, the fact that cold is a major limiting factor to their survival points to their not being native to Europe.

Absinthe Wormwood

November 2018

Originally from Eurasia, it is a perennial with a strong pungent sage-like odor. It forms a shrub and the new growth emerges from an existing crown each spring. Often found in pastures or roadsides, it can be a difficult and troublesome pest.

Bed Bug

October 2018

Bed bugs belong to a family of insects that are primarily human, bat and bird parasites. It is believed that the first bed bugs parasitized bats in ancient Mediterranean caves and began parasitizing humans as they inhabited caves along with bats. As cities were established and commerce between them followed, bed bug infestations became more permanent and spread to other areas. Now, the bed bug (often called the common bed bug) has a worldwide distribution and is the dominant bed bug in temperate climates.

Canada Thitsle

September 2018

A perennial with extensive underground creeping roots – which makes this weed a challenge to control. Canada thistle is a native of Eurasia but was introduced to North America in the late 18th century.

House Mouse

August 2018

The house mouse probably originated around northern India and stowed away in grain supplies as people migrated around the world. It is now a worldwide pest and, in most cities, it is the top rodent pest. In addition to being transported to new areas as stowaways, house mice are able to enter smaller structural openings than rats and require very little living space. They also require less water than rats because, if necessary, they are able to meet their body’s moisture requirement by producing metabolic water from food. Once indoors and a food resource is established, they can breed throughout the year.

Leafy Spurge and Yellow Toadflax

July 2018

What do both of these weeds have in common? They originate from the same are - Eurasia. Both weeds have an extensive creeping root system which makes them difficult to control. Both weeds aggressively invade rangeland and have yellow flowers.


June 2018

Raccoons in general are New World animals. Of the three raccoon species that exist, the common raccoon is the largest and most widely distributed. It is native to North and Central America from southern Canada down to Panama. Originally from the tropics, the common raccoon is one of a few larger animals whose range increased along with human settlement. They have been introduced outside of their native range into Europe and Japan where they have become invasive.


May 2018

Native to Asia, kochia- a summer annual broadleaf - was introduced as an ornamental to North America. Today, it infests fields, gardens, roadsides, ditches, and waste areas. It is commonly known as summer cypress, burning bush, and goosefoot. Kochia has a unique seed dispersal method since a mature plant will roll with the wind leaving a trail of offspring in the following growing season. One plant can produce up to 25,000 seeds but they are short lived in the soil. Kochia is one of the very first to emerge early in the spring and can survive harsh soil conditions, including sandy or alkaline soils.

Rock Pigeons

April 2018

Today, rock pigeons are common in cities around the world. Originally, they were cliff-dwelling birds with a natural range from western and southern Europe through northern Africa to southwestern Asia. The earliest record of their domestication dates back to at least 5,000 years ago in the eastern Mediterranean, making rock pigeons the world’s oldest domesticated bird. They were the main bird eaten in Europe and the Middle East for many years. Due to their good homing ability, they were also used to send messages over long distances. European settlers first brought domesticated rock pigeons to North America in the early 1600s. All feral rock pigeons in North America are the result of escaped domestic birds.


March 2018

Commonly known as common reed grass; originated in Eurasia. Invasive Phragmites are moving west from Eastern Canada; they've been identified as far as Alberta.

Norway Rats

February 2018

Norway rat is the official common name for a rat that is native to the eastern Siberia/China border and parts of Japan. This misnomer occurred because the English naturalist who classified the rat in 1769 thought the rat was introduced to the UK on Norwegian ships. Although not true, the name stayed and continues to be used today.