Introduction
| Trade Name: Devrinol | Common Name: napropamide | Formulation: 50 DF |
Uses
Preemergence control of many annual grasses and some broadleaf weeds in container- and field-grown ornamentals, groundcovers, and flowers. May be used in liner stock, newly transplanted, or established nursery crops, and Christmas trees.
| Amount of Active Ingredient | Amount by Formulation | |
|---|---|---|
| 50 DF | ||
| Per Acre | 4 to 6 lb | 8 to 12 lb |
| Per 1,000 sq. ft. | 3 to 4.4 oz. |
Major Weeds Controlled
Annual grasses and some annual broadleaves including chickweed, groundsel, knotweed, pineappleweed, knawel, and filaree. Suppression of yellow nutsedge.
Major Weeds Not Controlled
The following are generally not controlled from seed: bindweed, morningglory, mustard, nightshade, horsenettle, jimsonweed, yellow woodsorrel, horseweed, spurge, evening primrose, and fleabane daisy. Purple nutsedge, large-seeded broadleaf weeds, perennials, and established weeds are not controlled.
For Best Results
Apply to freshly weeded (or cultivated) soil before weeds germinate. Incorporate immediately by tillage, irrigation, or rainfall. Control may decrease if water is not provided within two to three days of application.
Cautions and Precautions
Apply to newly planted container stock after soil has settled from first watering. The 50 DF formulation can injure young, tender foliage on some plants. It is best applied before bud break or after the new growth has matured.
Residual Activity
Full-season grass control can be expected from a single spring application. At the higher rates, carry-over can affect the establishment of grass cover crops seeded in late summer or early fall.
Volatility and Leaching Potential
Moderately volatile. Photo-labile. Incorporation via irrigation or cultivation will reduce losses due to volatility and photodegradation. Leaching is negligible.
Symptoms and Mode of Action
Inhibits root growth. Susceptible weeds do not emerge. Root growth of crops may be inhibited resulting in wilting during periods of stress. Young, tender crop foliage may exhibit contact-burn-type injury. In rare cases, plant height and vigor of herbaceous ornamentals is reduced. Mode of Action Group 15.
Additional Information
| Worker Protection Standards | REI: 12 hours | |
| PPE: coveralls, chemical resistant gloves, shoes plus socks | ||
| Distributor: United Phosphorus | EPA Reg. # 70506-38 |
Publication date: Nov. 18, 2014
Revised: Oct. 16, 2024
Recommendations for the use of agricultural chemicals are included in this publication as a convenience to the reader. The use of brand names and any mention or listing of commercial products or services in this publication does not imply endorsement by NC State University or N.C. A&T State University nor discrimination against similar products or services not mentioned. Individuals who use agricultural chemicals are responsible for ensuring that the intended use complies with current regulations and conforms to the product label. Be sure to obtain current information about usage regulations and examine a current product label before applying any chemical. For assistance, contact your local N.C. Cooperative Extension county center.
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