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Houndstongue (Cynoglossum officinale L.) Identification and Control - Stop the Spread - W1307
Houndstongue is a biennial, poisonous herb that is native to Eurasia. The plant is a member of the Borage family, which includes more commonly known plants such as Virginia bluebells, forget-me-nots and the fiddlenecks. Houndstongue commonly is found in disturbed areas, including roadsides and trails, and in pasture and woodlands following soil disturbance or overgrazing.
Located in Landing Pages / Crops
Integrated Management of Leafy Spurge - W866
Leafy spurge is the most difficult noxious weed to control in North Dakota and infests all 53 counties in a variety of environments. Leafy spurge is found in pasture, rangeland, cropland, roadsides, shelterbelts, and other non-cultivated areas. Cultivation will control leafy spurge in conventional cropland, but the weed can become the dominant species in reduced-till cropland, pas-ture, and rangeland if not controlled.
Located in Landing Pages / Crops
Leafy Spurge Control Using Flea Beetles - W1183
Leafy spurge is an exotic perennial weed that infests over 800,000 acres in North Dakota. Although leafy spurge can be successfully controlled with herbicides, treating large acreages is not cost-effective. In fact, approximately 40 percent of the leafy spurge infested rangeland has a carrying capacity below the herbicide cost break-even point. Using biological agents to control leafy spurge has become an economic alternative in many locations in the state.
Located in Landing Pages / Crops
Leafy Spurge Identification and Chemical Control - W765
Leafy spurge (Euphorbia esula L.) is a widely established perennial weed in North Dakota, infesting approximately 990,000 acres of land in 2005 (North Dakota Department of Agriculture survey). The leafy spurge infestation in North Dakota seems to have peaked at about 1.5 million acres in 2000 and 2001. The decline thereafter has been a result of an effective control program initiated in the early 1980s. Prior to this control program, leafy spurge acreage doubled every 10 years from 1950 to 1985. Despite the decline in acreage, the widespread infestation continues to cost the state more than $75 million annually in lost production.
Located in Landing Pages / Crops
Identification and Control of Invasive and Troublesome Weeds in North Dakota - W1411
Th is publication is intended to help land managers properly identify and control noxious and invasive weeds found in the state. Th e current list of 11 noxious weeds are included, as well as species listed by various counties as noxious. Other species included are either invasive weeds found in bordering states with the potential to move into North Dakota or are commonly misidentifi ed native species that do not require control eff orts, such as the native thistles.
Located in Landing Pages / Crops
Biology and Management of Biennial Wormwood - W1322
Biennial wormwood is an aggressive and prolific seed-producing plant that has become a problem mainly in soybean and dry edible bean production areas of Minnesota, North Dakota and South Dakota. Biennial wormwood, as its name infers, was primarily biennial when the species fi rst was classified, but weedy cropland biotypes of biennial wormwood are annual plants. Many factors, such as season-long emergence, prevalence in moist environments, adaptation to all tillage systems, tolerance to commonly used soil-applied and postemergence herbicides, and misidentification of biennial wormwood as common ragweed, contribute to increased biennial wormwood infestations. Some herbicides used to control common ragweed do not control biennial wormwood.
Located in Landing Pages / Crops
A Guide to North Dakota Noxious and Troublesome Weeds - W1691
This guide was made with collaboration of the author with the North Dakota State University Extension Service and the North Dakota Department of Agriculture, with funding from the U.S. Forest Service. This publication is designed to help land managers identify the state- or county-listed noxious weeds. Other species included are those with the most potential to spread within the state or into North Dakota from bordering states.
Located in Landing Pages / Crops
Perennial and Biennial Thistle Control - W799
Thistles are especially troublesome following cool, wet summers and falls, when seed production and seedling establishment are high. An integrated weed control program that combines chemical, cultural (such as crop rotation or grass competition), mechanical and biological methods is most likely to be successful.
Located in Landing Pages / Crops
Identification and Control of Purple Loosestrife (Lythrum salicaria L.) - W1132
Purple loosestrife, a beautiful garden plant with an aggressive nature, was first introduced into North America in the early 1800s. The plant was sold in North Dakota by its genus name Lythrum for at least 50 years. Lythrum plants were brought to North Dakota for flower gardens because of their striking color, ease of growth, winter hardiness, and lack of insect or disease problems. The garden varieties of purple loosestrife were sold by many cultivar names including Morden Pink, Drop-more Purple, and Morden Gleam. These garden cultivars were thought to be sterile but have now been shown to cross-pollinate with the wild Lythrum type and sometimes with other Lythrum cultivars.
Located in Landing Pages / Crops
Know Your Knapweeds - W1146
North Dakota is being threatened by three noxious weeds that could infest more acreage in the state and at a faster rate than leafy spurge. Members of this trio include spotted, diffuse, and Russian knapweed. These three knapweeds already infest more acreage than leafy spurge in Montana and Minnesota, and have been found in over 25 counties in North Dakota. Knapweeds are related to thistles and can spread even faster.
Located in Landing Pages / Crops
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