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You are here >1Up Info > Wildlife, Animals, and Plants > Plant Species > Forb > Species: Cardaria draba | Heart-Podded Hoary Cress

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SPECIES: Cardaria draba | Heart-Podded Hoary Cress
WOOD PRODUCTS VALUE : NO-ENTRY IMPORTANCE TO LIVESTOCK AND WILDLIFE : Heart-podded hoary cress is generally considered unpalatable to livestock. However, sheep eat plants in early growth stages, and cattle ingest seedheads [18,25]. PALATABILITY : NO-ENTRY NUTRITIONAL VALUE : Although heart-podded hoary cress contains glucosinolates and is potentially mildly toxic [18], nutritional levels are adequate to meet the requirements of most classes of livestock, especially in the early growth stages. Foliage becomes coarse and bitter as it matures [18,25]. Mean nutrient composition of whole heart-podded hoary cress plants collected at five dates from eight sites in eastern Oregon, 1988 is as follows [18]: Phenology rosette bolting early bloom full bloom full seed % dry weight (4-12) (4-24) (5-12) (6-10) (7-7) dry matter 22.6 22.6 27.6 33.4 95.9 crude protein 28.8 29.5 20.3 11.3 7.9 ndf * 13.1 16.0 23.9 34.9 52.8 adf ** 12.0 13.4 21.6 28.8 41.8 cellulose 9.9 11.2 17.0 22.0 32.1 lignin 1.9 2.3 4.4 5.9 9.4 ether extract 1.6 1.5 1.9 2.2 2.4 in-vitro *** 77.3 74.7 69.8 64.9 49.1 * neutral detergent fiber ** acid detergent fiber *** in-vitro organic matter digestibility COVER VALUE : NO-ENTRY VALUE FOR REHABILITATION OF DISTURBED SITES : NO-ENTRY OTHER USES AND VALUES : Heart-podded hoary cress seed may be used as a substitute for pepper [22]. MANAGEMENT CONSIDERATIONS : Heart-podded hoary cress is classified as a noxious weed in 24 states and 4 provinces [22,36]. Control is difficult because of the perennial root system, abundant seed production, and diverse habitat of the plant. In the absence of a competitor, a single plant spread over an area 12 feet (3.6 m) in diameter in 1 year [20]. Irrigation facilitates the spread and establishment of heart-podded hoary cress by transporting root material from neglected ditch banks [22]. Control Methods - Mechanical: Cultivation alone will control heart-podded hoary cress when tillage begins at flowerbud time and is repeated every 10 days throughout the growing season [19]. In Manitoba and Alberta, it takes 3 years of intensive tillage to kill the root system of heart-podded hoary cress [22]. Flooding can kill heart-podded hoary cress. Seeds buried in moist compacted manure for 1 month lose their viability [22]. Early spring plowing and planting to a cereal crop can control heart-podded hoary cress [25]. Biological: Dense stands of established perennial grasses provide some resistance to invasion and spread of heart-podded hoary cress if grazing is not excessive [19]. Chemical: Several herbicides can control heart-podded hoary cress. They are most effective if applied during the early bud stage or late fall rosette stage [16,19,32]. Spraying followed by spring mowing can control up to 90 percent of heart-podded hoary cress [25]. Dense stands of grass, mowed only when necessary and treated with a selective herbicide, are best for controlling heart-podded hoary cress. Refer to publication [32] for information on effective herbicides and application procedures. Heart-podded hoary cress has some forage value, but until research better evaluates its toxicity, McInnis [18] recommends the following cautionary measures when allowing livestock to graze infested rangelands: provide supplemental iodine, graze mature and nonlactating animals, and provide alternate grazing areas.

Related categories for Species: Cardaria draba | Heart-Podded Hoary Cress

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