Reference

Growth of loblolly pine treated with hexazinone, sulfometuron methyl, and metsulfuron methyl for herbaceous weed control

Growth of loblolly pine treated with hexazinone, sulfometuron methyl, and metsulfuron methyl for herbaceous weed control. Michael, J. L. (Southern For. Exp. Stn., Auburn Univ., Auburn, AL 36849, USA). South. J. Appl. For., 9(1), 20-6 (English) 1985. CODEN: SJAFD9. ISSN: 0148-4419. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemical Bioregulators) Aerial application of 0.25 lb active ingredient per acre of Oust (sulfometuron Me, formerly DPX-5648 [74222-97-2]) or 2.0 lb of Velpar L (hexazinone) [51235-04-2] postemergent in May 1982 resulted in good weed control. Weeds controlled on the silty clay coastal plain soil included pokeweed (Phytolacca americana), ragweed (Ambrosia), goldenrod (Solidago), and evening primrose (Oenothera). Growth of 1-yr-old loblolly pine (Pinus taeda) seedlings released with sulfometuron Me [79510-48-8] or hexazinone was improved in comparison to untreated seedlings. No significant pine mortality was assocd. with either treatment. On similar sites where blackberry (Rubus), honeysuckle (Lonicera japonica), and herbaceous weeds are the major problem, application of sulfometuron Me from pre-emergence to the postemergent stage (when weeds are ￡12-18 in. in height) is recommended. Hexazinone is recommended as a postemergent treatment for herbaceous weed control. Treatment with metsulfuron methyl (formerly DPX-T6376-21) [74223-64-6] did not result in any growth responses greater than untreated seedlings. Impacts of deer browsing on seedlings resulted in a slight height redn. the 1st and 2nd growing seasons following planting, but by the end of the 3rd growing season browsed seedlings had made up the difference. No diam. differences were assocd. with deer browsing at any time during the study.

Comparison of chlorsulfuron and metsulfuron for control of Allium vineale L

Comparison of chlorsulfuron and metsulfuron for control of Allium vineale L. Leys, A. R.; Slife, F. W. (Dep. Agron., Univ. Illinois, Urbana, IL 61801, USA). Weed Res., 27(1), 35-41 (English) 1987. CODEN: WEREAT. ISSN: 0043-1737.There are some reagents with their cas registry numbers 64902-72-3 and 79510-48-8 are used in this study. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemical Bioregulators) The response of natural and planted stands of A. vineale to chlorsulfuron [64902-72-3] and metsulfuron [79510-48-8] was detd. in field expts. in Illinois, USA, in 1982 and 1983. In natural stands very low rates of either herbicide controlled A. vineale. Chlorsulfuron, applied in the spring at 20 g ha-1, reduced aerial bulblet prodn. by 99%, but when it was applied in the fall it reduced aerial bulbet prodn. by only 59%. All rates of metsulfuron (5-20 g ha-1), at both times of application, effected >94% redn. in plant d. and yield of aerial bulbets. In a glasshouse expt., plants derived from aerial bulblets were more susceptible to chlorsulfuron than plants derived from soft offset bulbs. Soft offset bulbs were, therefore, used to establish a uniform stand of A. vineale in the field. In this expt., nonlinear regression anal. showed that metsulfuron was 2-3 times more active than chlorsulfuron. Metsulfuron and chlorsulfuron, applied in Apr. at 5 and 15 g ha-1, resp., reduced aerial and underground bulb prodn. by 95%. .