Sedge weed

Ethoxysulfuron (HOE 095404) [32] is a very flexible herbicide for the control of broadleaf and sedge weed species (Table 2.2.15). 

Orthosulfamuron (IR-5878, CAS-No. 213464-77-8) (Fig. 2.2.6) [47], is a broad-spectrum pre- and postemergent rice herbicide developed by Isagro for the control of annual broadleaf and sedge weeds. There is only limited public knowledge available about this compound but it is assumed to be applied at a use rate of 25-150 g-a.i. ha and could be on the market by 2007. 

Compound, (9,(9-dimethyl l-(2,4-dichlorophenoxyacetoxy)-l-(fur-2-yl) methyl-phosphonate IG-21 (HWS) is another plant PDHc inhibitor. Its low toxicity to rat, bees, birds, fish, and silkworm warranted further evaluation as well. IG-21 was found to be an effective compound against broadleaf weeds at 50-300 g ai/ha rate and it was safe to maize and rice even at the rate as high as 0.9-1.2 kg ai/ha in the greenhouse. In maize field trials at different regions in China showed that IG-21 could control a broad spectrum of broadleaf and sedge weeds at 135-270 g ai/ha for post-emergence applications. IG-21 displayed good potential as a selective and environment-friendly herbicide. Detail discussion for IC-22 and IG-21 can be found in Chap. 8. 

More than 40 field trials in different regions in China showed that clacyfos exhibited potent activity against annual and perennial broad-leaved and sedge weeds in lawn, wheat and maize fields by post-emergence application. Clacyfos was safe for monocot crops or monocot turf grass at the recommended rates of... 

Field trials in different regions in China confirmed that HWS could provide excellent weed control in the maize field against broad-leaved and sedge weeds at 300-450 g ai/ha for post-emergence application. HWS showed better weed control than that of the commercial herbicide 2-methyl-4-chlorophenoxyacelic acid (MCP A). At 450 g ai/ha, HWS was comparable to the effects of nicosulfuron (48 g ai/ha) and fluroxypyr (180 g ai/ha). HWS exhibited xylem mobility and a stronger rain stability than MCPA due to its rapid absorption and good osmosis. 

Sulfentrazone is a broad-spectrum, pre-emergent herbicide that provides good control over broadleaf weeds, grasses and sedges in crops and turf. The metabolism of sulfentrazone in animals and plants is similar. The major plant metabolite of sulfentrazone is 3-hydroxymethyl sulfentrazone (HMS). The soybean tolerance of 0.05 mg kg includes residues of sulfentrazone plus its major metabolite, HMS. The rotational crop tolerance includes residues of sulfentrazone and its major metabolites, HMS and... 

Holm et al. state that across the world about 200 weed species are involved in 95% of man s weed problems as related to food production (2). They list 80 species as primary weeds and 120 species as secondary weeds. The United States has seventy percent of the world s worst weeds 24% of these are grasses, 67% broadleaf weeds, and 7% sedges. 

Bentazone Acid 25057-89-0 2.55 1972 Herbicide A postemergence herbicide used for selective control of broadleaf weeds and sedges (a weed) in beans, rice, com, peanuts, mint, and others... 

Trifloxysulfuron is a sulfonylurea for control of grasses, sedges, and broadleaf weeds following preemergence, postemergence over the top of sugarcane, or post-directed applications. The total of all applications should not exceed 0.08 kg a.i./ha per season. 

Uses nonselective, post-emergent, broad spectrum herbicide to control annual and perennial grasses, sedges, broadleaf, and emerged aquatic weeds also used to control insects on fruit trees. 

Uses Glyphosate is a phosphanoglycine and does not inhibit cholinesterase activity.12,13 Glyphosate is a broad-spectrum, nonselective systemic herbicide with moderate toxicity. Essentially, it is useful on all annual and perennial plants including grasses, sedges, broadleaf weeds, and woody plants. It is used on noncropland and on a variety of crops.17,28-34... 

Broad leaf weed, grass, and sedge controller... 

Sedges are similar to grasses except that they have triangular stems and three rows of leaves. They are often listed under grasses on the pesticide label. Most sedges are found in wet places, but principal pest species are found in fertile, well-drained soils. Yellow and purple nutsedge are perennial weed species which produce rhizomes and tubers. 

Herbicides are the most important pesticide class in terms of production volume and market value. In agriculture they are used to control weeds. Weeds are unwanted plants, such as grasses, sedges, and broadleaf plants, that compete with the desired crop plants for nutrition, water, and land, thereby reducing the yield. Herbicides also have nonagricultural uses as they help in erasing vegetation on streets, railroad tracks, sports fields, and other public areas. 

This herbicide has a broad activity spectrum in hand- or mechanically transplanted rice. It controls the most important weeds such as Echinocloa crus-galli, sedges and many broad-leaved weeds at rates of 500-1000 g active ingredient/ha. 

M. Hess, E. Rose, HOE 095404 A new herbicide for broadleaf weed and sedge control in rice, Proc. BCPC Conference - Weeds 763-768 (1995). 

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