44765
Casoron, Barrier
Common Name: dichlobenil
Formulations: 4G
Uses: Casoron for late fall or early spring applied preemergence control of annual and perennial broadleaf and grass weeds in established field-grown woody ornamentals, nut and fruit trees, and non-crop land areas. Barrier for late fall to early spring applied preemergence control of annual and perennial weeds around landscape ornamentals not grown for commercial sale, parks, and roadsides.
| Amount of active ingredient | Amount by formulation |
| | 4G |
Per Acre | 4 to 8 lb. | 100 to 200 lb. |
Per 1,000 sq. ft. | | 1.2 to 4.6 lb. |
Major Weeds Controlled: Preemergent control of most spring-germinating annuals. Postemergent control of many winter annual weeds. Control of several perennial weeds, including dandelion, field horsetail (Equisetum), red sorrel, fescue, orchardgrass, and wild carrot. The higher rate will suppress other perennials, including mugwort and quackgrass. For preplant control of yellow nutsedge in non-crop areas, Casoron 4G is labeled at 8 to 10 lb. AI per acre.
Major Weeds Not Controlled: Weeds germinating in mid to late summer will not be controlled, in particular, late-germinating annual grasses.
For Best Results: Apply in late fall or very early spring. Spring application of granular product should be incorporated.
Cautions and Precautions: Do not use for six months after planting rooted cuttings. Do not use in seedbeds, transplant or cutting beds, or greenhouses. Do not use on light, sandy soils. Do not allow granules to accumulate and contact trunk at or below the soil line. Do not allow granules to lodge in foliage, particularly in conifer species. See labels for species and rate restrictions and for additional precautions.
Residual Activity: Mulch on top of the granular herbicide will extend the length of residual control. Cultivation in late spring will reduce residual control. Higher rates will provide longer residuals, but crops will generally be injured.
Volatility and Leaching Potential: Highly volatile, thus this product is not recommended for use in enclosed structures because crop injury is likely. Dichlobenil can move down a slope. Whether this is by mass action movement of granules or leaching of the active ingredient is unclear. This chemical demonstrates the properties and characteristics associated with chemicals detected in groundwater. The use of this chemical in areas where soils are permeable, particularly where the water table is shallow, may result in groundwater contamination.
Symptoms and Mode of Action: Acts primarily on growing points and root tips. Upward translocation is rapid. Inhibits growth of meristems (growing points). Crop injury symptoms include delayed budbreak, general reduction in vigor, and marginal chlorosis and "scorching" of leaves.
Manufacturers: OHP
MacDermid Agricultural Soultions
Gordon's Professional Products
EPA Reg. Nos.: Casoron 4G: 400-168Barrier 4G: 2217-675