Record 31 of 382 - CRIS/ICAR 9/96 TI: WEED MANAGEMENT STRATEGIES FOR ORNAMENTAL PLANTS, STRAWBERRIES, AND FIBER FLAX IN: MERVOSH-T-L PO: ANALYTICAL CHEMISTRY. CON AGRIC EXPT STA-PO BOX 1106 LO: NEW HAVEN, CONNECTICUT 06504. FY: 1995 CL: PRIMARY CLASSIFICATION GENERAL CLASSIF. RPA ACTVTY CMMDTY SCNCE PRCNT PRGM JTC R206 A4700 C1000 F0212 25% P3.13 J2B R209 A4700 C2500 F0212 25% P3.12 J2B R906 A4700 C1300 F0212 35% P3.15 J2B R906 A4700 C1300 F1528 15% P3.15 J2B PH: R206 (Weed-and-Hazard-Control-Fruit,-Vegetables); R209 (Weed-and-Hazard-Control-Field-Crops); R906 (Culture-and-Protection-Ornamentals,-Turf); A4700 (Protection-Against-Weeds); C1000 (Deciduous-and-Small-Fruits-and-Nuts); C2500 (Other-Oilseeds-and-Oil-Crops); C1300 (Ornamentals-and-Turf); F0212 (Biology-Environmental,-Systematic-Plant); F1528 (Chemistry-Soils) GH: P3.13 (Fruit); P3.12 (New-Crops-and-Minor-Oilseeds); P3.15 (Plants-to-Enhance-the-Environment); J2B (Plant-Protection) SC: XPR (Pollution-Related) 15%; S1033 (Strawberries) 25%; S2530 (Flax) 25%; S1310 (Woody-Shrubs) 20%; S1321 (Herbaceous-Perennials,-Decorative-Greens) 15%; S1324 (Potted-Flowering-Plants) 15%; PST1 (Target-I-Biology) 15%; PST2 (Target-II-Nonpesticidal-Control) 20%; PST3 (Target-III-Pesticide-Use-Patterns) 50%; IPMC (Integrated-Control-Control-Components) 20%; IPM1 (Integrated-Control-Systems-Level-I) 40%; IPM2 (Integrated-Control-Systems-Level-II) 20% DE: #JC95-05; HERBICIDES; WEEDS; WEED-CONTROL; HERBICIDE-EFFECTIVENESS; HERBICIDE-EVALUATION; HERBICIDE-MOVEMENT; FIELD-TRIALS; NURSERIES; CONTAINER-PRODUCTION; STRAWBERRIES; PRODUCTION-SYSTEMS; COVER-CROPS; COMPANION-CROPS; NON-CHEMICAL-CONTROL-(WEEDS); SORPTION; SOIL-CHEMISTRY; FLAX; ORNAMENTAL-PLANTS CT: Basic 25%; Applied 75%; Developmental 0% OB: Evaluate the efficacy, crop safety, and potential for off-site movement of herbicides for field-grown and container-grown ornamentals. Compare strawberry production systems involving the use of cover crops and/or companion crops to a standard herbicide-based system for weed management. Evaluate herbicides and identify cultural factors that provide effective management of weeds in fiber flax. AP: Crop injury and weed control ratings will be taken for herbicides applied to field-and container-grown ornamental plants. Herbicide sorption properties in soils and container substrates will be calculated. Cover and companion crops in strawberries will be evaluated for effects on weed densities and strawberry yields relative to chemical controls. Herbicides will be evaluated for flax injury and weed control. The effects of nitrogen fertility and planting date on weed competition with flax will be determined. PR: 9501 TO 9512 The herbicides halosulfuron and sulfentrazone are being evaluated for possible registration in ornamental crops. Both prevented emergence of annual sedge and many broadleaf weeds for 2 to 3 months when applied over the top of yew, arborvitae, juniper, hemlock, and rhododendron in early June. Halosulfuron caused chlorosis and growth suppression of yew, arborvitae, and rhododendron; sulfentrazone temporarily injured hemlock foliage only. Combinations of sulfentrazone and isoxaben provided excellent weed control without significant injury to any of these ornamentals. In containers, sprayable combinations of isoxaben plus prodiamine or oryzalin prevented weeds such as horseweed and common groundsel to a greater extent than granular combinations of oxyfluorfen plus oryzalin or pendimethalin. The granular herbicides occasionally caused spotting injury to rhododendron leaves, and high rates of isoxaben plus pendimethalin injured rhododendron. Reduced weed control resulted from treatments of isoxaben alone or combined with napropamide. Compared to weed populations in strawberry plots, broadleaf weeds were suppressed in plots containing rotation crops of sorghum-sudangrass, ^Garry' oats, and ^Saia' oats. The preemergence herbicides EPTC and trifluralin caused unacceptable injury to flax. Postemergence herbicides such as sethoxydim plus MCPA or linuron provided adequate weed control with minimal crop injury. Early planting of flax reduced competition from weeds. PB: 9501 TO 9512 MERVOSH, T.L. and AHRENS, J.F. 1996. Sulfentrazone and halosulfuron for preemergence weed control in woody ornamentals. Proc. Northeastern Weed Sci. Soc. (in press). MERVOSH, T.L. and AHRENS, J.F. 1996. Isoxaben spray combinations and granular herbicides for container-grown woody ornamentals. Proc. Northeastern Weed Sci. Soc. (in press). OC: 000210 IC: 006160 SU: Region 1 (Northeastern). PS: NEW UD: 9503 UP: 9605 PP: 9512 --------------------------------------------------------------------------------