WEED CONTROL TRIALS 1999 RIDGETOWN COLLEGE. W. Deen P.H. Sikkema

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1 WEED CONTROL TRIALS 1999 RIDGETOWN COLLEGE W. Deen P.H. Sikkema

2 ACKNOWLEDGEMENTS Funds to support the 1999 research program were obtained from a number of the herbicide companies. The support and cooperation of these companies is greatly appreciated. We also appreciate the cooperation of the Vegetable Processors who provided seed and plants for the research program, as well as the participation of the following grower cooperators: W. Bickell (Nabisco Ltd.) - Exeter, Centralia B. & A. Dielman - Thamesville F. Furlan - Chatham J. Gibson - Seaforth C. Gillard - Muirkirk E. Gyetvai - Old Castle J. Horn - Centralia JonErn Farms - Erieau B. Litwin - Highgate R. Mann - Chatham B. Miller - Staffa G. & D. Morden - Highgate C. Pegg - Ridgetown K. Roodzant - Rodney G. Spence - Thamesville Tiessen Acres - Leamington R. Van Damme - Watford D. Vandewalle - Dublin A. Warwick - Ridgetown We hope that the information provided by this research will further the science of weed control by assisting companies with the registration and labeling of their products. This information will also allow research and extension personnel to suggest proper herbicide recommendations, thereby enabling growers to achieve consistent weed control with a minimum of crop damage. Research Technicians Dave Bilyea Todd Cowan Monica Elmes Yvonne McLellan Christy Shropshire Summer Assistants Jennifer Dennis Adriaan Geluk Shauna Hearns Suzy Hoyles Joe Hoyles Bruce Humphries Erin McNaughton Sarah Moerman Katharine Saunders W. Deen Ridgetown College/University of Guelph Ridgetown, Ontario N0P 2C0 (519) bdeen@ridgetownc.uoguelph.ca P.H. Sikkema Ridgetown College/University of Guelph Ridgetown, Ontario N0P 2C0 (519) psikkema@ridgetownc.uoguelph.ca

3 TABLE OF CONTENTS Alfalfa: WEED MANAGEMENT SYSTEMS IN IMI-SMART CORN UNDERSEEDED TO ALFALFA Beans, Edible: HERBICIDE TOLERANCE IN LIMA BEANS - I HERBICIDE TOLERANCE IN LIMA BEANS - II HERBICIDE TOLERANCE IN LIMA BEANS - III HERBICIDE TOLERANCE IN LIMA BEANS - IV TOLERANCE OF LIMA BEANS TO VARIOUS HERBICIDE PROGRAMS TOLERANCE OF SNAP BEANS TO VARIOUS HERBICIDE PROGRAMS WEED CONTROL IN BEANS WITH IMAZETHAPYR COMBINATIONS APPLIED PREPLANT INCORPORATED. 14 WEED CONTROL IN EDIBLE BEANS WITH PREEMERGENCE HERBICIDES POSTEMERGENCE BROADLEAF WEED CONTROL IN EDIBLE BEANS WITH IMAZAMOX TOLERANCE OF VARIOUS MARKET CLASSES OF DRY EDIBLE BEANS TO IMAZAMOX PLUS FOMESAFEN TOLERANCE OF VARIOUS MARKET CLASSES OF DRY EDIBLE BEANS TO IMAZAMOX PLUS FOMESAFEN II TOLERANCE OF VARIOUS MARKET CLASSES OF DRY EDIBLE BEANS TO IMAZETHAPYR TOLERANCE OF VARIOUS MARKET CLASSES OF DRY EDIBLE BEANS TO IMAZETHAPYR II TOLERANCE OF ADZUKI BEANS TO VARIOUS HERBICIDE PROGRAMS TOLERANCE OF MUNG BEANS TO VARIOUS HERBICIDE PROGRAMS TOLERANCE OF BLACK BEANS TO VARIOUS HERBICIDE PROGRAMS TOLERANCE OF BROWN BEANS TO VARIOUS HERBICIDE PROGRAMS TOLERANCE OF CRANBERRY BEANS TO VARIOUS HERBICIDE PROGRAMS TOLERANCE OF YELLOW EYE BEANS TO VARIOUS HERBICIDE PROGRAMS TOLERANCE OF RED KIDNEY BEANS TO VARIOUS HERBICIDE PROGRAMS TOLERANCE OF WHITE KIDNEY BEANS TO VARIOUS HERBICIDE PROGRAMS Cole Crops: BROCCOLI TOLERANCE TO PYRIDATE AND CLOPYRALID TANKMIXES CABBAGE TOLERANCE TO PYRIDATE AND CLOPYRALID TANKMIXES CAULIFLOWER TOLERANCE TO PYRIDATE AND CLOPYRALID TANKMIXES TOLERANCE OF TRANSPLANTED CABBAGE TO S-METOLACHLOR/BENOXACOR APPLICATION AND TIMING TOLERANCE OF COLE CROPS TO GRAMINICIDES Corn, Conventional: BROADSPECTRUM WEED CONTROL IN CORN WITH SMAF 550 SC APPLIED PREPLANT INCORPORATED. 43 BROADSPECTRUM WEED CONTROL IN CORN WITH SMAF 550 SC APPLIED PREEMERGENCE BIOLOGICALLY EFFECTIVE DOSE OF ZA1296 FOR PREEMERGENCE AND POSTEMERGENCE WEED CONTROL IN CORN BROAD SPECTRUM WEED CONTROL IN CORN WITH PREEMERGENCE HERBICIDES BROADSPECTRUM WEED CONTROL IN CORN WITH PRIMISULFURON/DICAMBA APPLIED POSTEMERGENCE CONTROL IN CORN WITH SMAF 550 SC APPLIED POSTEMERGENCE BROADSPECTRUM WEED CONTROL IN CORN WITH FLUMETSULAM/CLOPYRALID COMBINATIONS BROAD SPECTRUM WEED CONTROL IN CORN WITH NICOSULFURON PLUS BAS 662H TANKMIXES BROAD SPECTRUM WEED CONTROL IN CORN WITH ATRAZINE/2,4-D I WEED MANAGEMENT SYSTEMS IN IMI-SMART CORN UNDERSEEDED TO RED CLOVER WEED MANAGEMENT SYSTEMS IN LIBERTY LINK CORN COMPARISON OF WEED CONTROL WITH ROUNDUP READY AND LIBERTY LINK CORN WEED MANAGEMENT SYSTEMS IN ROUNDUP READY CORN WITH DROP NOZZLE APPLICATIONS COMPARISON OF WEED CONTROL AND CROP TOLERANCE IN HERBICIDE RESISTANT CORN COMPARISON OF CROP POTENTIAL IN HERBICIDE RESISTANT CORN WEED MANAGEMENT SYSTEMS IN ROUNDUP READY CORN WITH PENDIMETHALIN TANKMIXES BROADSPECTRUM WEED CONTROL IN CORN WITH SMAF 550 SC APPLIED PREPLANT INCORPORATED. 78 BIOLOGICALLY EFFECTIVE DOSE OF ZA1296 FOR PREEMERGENCE AND POSTEMERGENCE WEED CONTROL IN CORN BROADSPECTRUM WEED CONTROL IN CORN WITH SMAF 550 SC APPLIED PREEMERGENCE BROADSPECTRUM WEED CONTROL IN CORN WITH ZA1296 APPLIED POSTEMERGENCE BROADSPECTRUM WEED CONTROL IN CORN WITH FLUMETSULAM/CLOPYRALID COMBINATIONS BROAD SPECTRUM WEED CONTROL IN CORN WITH ATRAZINE/2,4-D

4 WEED MANAGEMENT SYSTEMS IN ROUNDUP READY CORN FOLLOWING PREEMERGENCE RESIDUAL HERBICIDES WEED MANAGEMENT SYSTEMS IN ROUNDUP READY CORN WITH GLYPHOSATE TANKMIXES I WEED MANAGEMENT SYSTEMS IN ROUNDUP READY CORN WITH GLYPHOSATE TANKMIXES II COMPARISON OF WEED CONTROL AND CROP TOLERANCE IN HERBICIDE RESISTANT CORN COMPARISON OF CROP POTENTIAL IN HERBICIDE RESISTANT CORN WEED MANAGEMENT SYSTEMS IN ROUNDUP READY CORN WITH FOE5043/METRIBUZIN POSTEMERGENCE WEED CONTROL IN SMART CORN WITH IMAZETHAPYR/ATRAZINE + DICAMBA III 115 Corn, No-till: BROADSPECTRUM WEED CONTROL IN NO-TILL CORN WITH SMAF 550 SC APPLIED PREPLANT EFFECT OF APPLICATION TIMING ON WEED CONTROL WITH EXP31130A BROADSPECTRUM WEED CONTROL IN CLEARFIELD CORN WITH IMAZETHAPYR PREMIXES APPLIED PREPLANT I BROADSPECTRUM WEED CONTROL IN CLEARFIELD CORN WITH IMAZETHAPYR PREMIXES APPLIED PREPLANT II WEED MANAGEMENT SYSTEMS IN ROUNDUP READY CORN WITH FOE5043/METRIBUZIN BROAD SPECTRUM WEED CONTROL IN NO-TILL CORN WITH ATRAZINE/2,4-D II BROAD SPECTRUM WEED CONTROL IN NO-TILL CORN WITH ATRAZINE/2,4-D III BROAD SPECTRUM WEED CONTROL IN ROUNDUP READY CORN WITH BAS 662H TANKMIXES BROAD SPECTRUM WEED CONTROL IN NO-TILL CORN WITH DPX PLUS BAS 662H TANKMIXES HEMP CONTROL IN CORN WITH POSTEMERGENCE HERBICIDES POSTEMERGENCE WEED CONTROL IN CLEARFIELD CORN WITH IMAZETHAPYR/ATRAZINE + DICAMBA I POSTEMERGENCE WEED CONTROL IN CLEARFIELD CORN WITH IMAZETHAPYR/ATRAZINE + DICAMBA II Corn, Sweet: TOLERANCE OF NINE SWEET CORN HYBRIDS TO ISOXAFLUTOLE APPLIED PREEMERGENCE TOLERANCE OF NINE SWEET CORN HYBRIDS TO PRIMISULFURON APPLIED POSTEMERGENCE TOLERANCE OF ELEVEN SWEET CORN HYBRIDS TO NICOSULFURON APPLIED POSTEMERGENCE TOLERANCE OF SIX SWEET CORN HYBRIDS TO GLUFOSINATE APPLIED POSTEMERGENCE WEED CONTROL STRATEGIES IN LIBERTY LINK SWEET CORN TOLERANCE OF FOUR SWEET CORN HYBRIDS TO NICOSULFURON APPLIED POSTEMERGENCE PROSO MILLET CONTROL EVALUATIONS WITH CONVERGE APPLIED PREEMERGENCE I PROSO MILLET CONTROL EVALUATIONS WITH CONVERGE APPLIED PREEMERGENCE II PROSO MILLET CONTROL IN LIBERTY LINK SWEET CORN I PROSO MILLET CONTROL IN LIBERTY LINK SWEET CORN II Cucumbers: WEED CONTROL AND HERBICIDE EFFICACY IN CUCUMBERS Garlic: TOLERANCE OF GARLIC TO PREEMERGENCE HERBICIDES TOLERANCE OF GARLIC TO POSTEMERGENCE HERBICIDES Industrial Hemp: TOLERANCE OF HEMP TO PREEMERGENCE HERBICIDES TOLERANCE OF HEMP TO POSTEMERGENCE HERBICIDES EFFECT OF CORN HERBICIDE RESIDUES ON THE GROWTH AND DEVELOPMENT OF INDUSTRIAL HEMP EFFECT OF SOYBEAN HERBICIDE RESIDUES ON THE GROWTH AND DEVELOPMENT OF INDUSTRIAL HEMP Peas, Processing: TOLERANCE OF SANCHO AND BOLERO PEAS TO TRIFLURALIN APPLIED PREPLANT INCORPORATED 160 WEED CONTROL IN PEAS WITH CLOMAZONE COMBINATIONS APPLIED PREEMERGENCE WEED CONTROL IN PEAS WITH IMAZETHAPYR APPLIED PREEMERGENCE POSTEMERGENCE WEED CONTROL IN PEAS I POSTEMERGENCE WEED CONTROL IN PEAS II Peppers: PREEMERGENT WEED CONTROL IN PEPPERS POSTEMERGENT WEED CONTROL IN PEPPERS

5 Plantbacks: PRIMISULFURON AND PRIMISULFURON/DICAMBA PLANTBACK TRIAL PRIMISULFURON AND PRIMISULFURON/DICAMBA PLANTBACK TRIAL - II Problem Weeds in Soybeans: PREEMERGENT CONTROL OF SPREADING ATRIPLEX IN NO-TILL SOYBEANS POSTEMERGENT CONTROL OF SPREADING ATRIPLEX IN NO-TILL SOYBEANS PREPLANT BURNDOWN OF BIENNIAL WORMWOOD POSTEMERGENT CONTROL OF BIENNIAL WORMWOOD IN NO-TILL SOYBEANS CRABGRASS CONTROL IN SOYBEANS - I CRABGRASS CONTROL IN SOYBEANS - II FALL PANICUM CONTROL IN SOYBEANS FIELD HORSETAIL CONTROL IN SOYBEANS WITH PREPLANT HERBICIDES FIELD HORSETAIL CONTROL IN ROUNDUP READY SOYBEANS POSTEMERGENT CONTROL OF BURCUCUMBER IN SOYBEANS POSTEMERGENT CONTROL OF HORSENETTLE IN SOYBEANS PROSO MILLET CONTROL IN ROUNDUP READY SOYBEANS WITH POSTEMERGENCE HERBICIDES I. 189 PROSO MILLET CONTROL IN ROUNDUP READY SOYBEANS WITH POSTEMERGENCE HERBICIDES II. 190 PROSO MILLET CONTROL IN ROUNDUP READY SOYBEANS WITH POSTEMERGENCE HERBICIDES III 191 POSTEMERGENT CONTROL OF SOW-THISTLE IN SOYBEANS POSTEMERGENT CONTROL OF ANNUAL SOW THISTLE IN NO-TILL SOYBEANS POSTEMERGENT CONTROL OF PRICKLY LETTUCE IN NO-TILL SOYBEANS POSTEMERGENT CONTROL OF CANADA FLEABANE AND PRICKLY LETTUCE IN NO-TILL SOYBEANS. 195 PREEMERGENT CONTROL OF CANADA FLEABANE IN NO-TILL SOYBEANS SANDBUR CONTROL IN SOYBEANS Problem Weeds in Corn: SWAMP SMARTWEED CONTROL IN CORN WITH PREEMERGENCE HERBICIDES SWAMP SMARTWEED CONTROL IN CORN WITH POSTEMERGENCE HERBICIDES BIENNIAL WORMWOOD CONTROL IN CORN WITH POSTEMERGENCE HERBICIDES HORSENETTLE CONTROL IN CORN WITH POSTEMERGENCE HERBICIDES I HORSENETTLE CONTROL IN CORN WITH POSTEMERGENCE HERBICIDES II FALL PANICUM CONTROL EVALUATIONS WITH EXP31130A APPLIED PREEMERGENCE FALL PANICUM CONTROL IN CORN FALL PANICUM CONTROL IN CORN WITH NICOSULFURON PLUS BAS 662H TANKMIXES CRAB GRASS CONTROL IN CORN PROSO MILLET CONTROL EVALUATIONS WITH CONVERGE APPLIED PREEMERGENCE I PROSO MILLET CONTROL EVALUATIONS WITH CONVERGE APPLIED PREEMERGENCE II PROSO MILLET CONTROL IN LIBERTY LINK SWEET CORN I PROSO MILLET CONTROL IN LIBERTY LINK SWEET CORN II Rutabagas: WEED MANAGEMENT IN RUTABAGAS WITH PREPLANT INCORPORATED HERBICIDES PREEMERGENCE HERBICIDE PROGRAMS FOR WEED CONTROL IN RUTABAGAS POSTEMERGENCE BROADLEAF WEED CONTROL IN RUTABAGAS POSTEMERGENCE ANNUAL GRASS CONTROL IN RUTABAGAS Soybeans, Conventional: WEED CONTROL IN SOYBEANS WITH FOE5043/METRIBUZIN I WEED CONTROL IN SOYBEANS WITH FOE 5043/METRIBUZIN II PRE EMERGENCE WEED CONTROL IN SOYBEANS WITH CHLORANSULAM-METHYL TANKMIXES ROUNDUP READY VOLUNTEER CORN CONTROL IN ROUNDUP READY SOYBEANS EFFECT OF GLYPHOSATE APPLICATION TIMING ON CONVENTIONAL SOYBEAN YIELD WEED CONTROL IN SOYBEANS WITH CHLORANSULAM-METHYL TANKMIXES DIMETHENAMID - BAS65607H BRIDGING TRIAL IN ROUNDUP READY SOYBEANS DIMETHENAMID-ROUNDUP TANKMIXES IN ROUNDUP READY SOYBEANS HERBICIDE/ADJUVANT TRIAL IN CONVENTIONAL SOYBEANS Soybeans, No-till: WEED FREE PERIOD IN NO-TILL SOYBEANS WITH FOE5043/METRIBUZIN APPLIED PREPLANT IMI PREPLANT TANKMIXES FOR CONSERVATION TILLAGE SOYBEANS COMPARISON OF EFFICACY AND TOLERANCE OF HERBICIDE PROGRAMS EFFECT OF GLYPHOSATE APPLICATION TIMING ON SOYBEAN YIELD HERBICIDE/ADJUVANT TRIAL IN NO-TILL SOYBEANS HERBICIDE/ADJUVANT TRIAL IN NO-TILL SOYBEANS - II HERBICIDE/ADJUVANT TRIAL IN NO-TILL SOYBEANS - III

6 Sugarbeets GLYPHOSATE TOLERANCE TRIAL IN ROUNDUP READY SUGARBEETS LIBERTY TOLERANCE IN LIBERTY LINK SUGARBEETS CONVENTIONAL SUGARBEET TOLERANCE TO NEW HERBICIDES WEED COMPETITION STUDY - LIBERTY LINK SUGARBEETS MICRO RATE HERBICIDE PROGRAMS IN SUGARBEETS Tomatoes: TOLERANCE OF TOMATOES TO FOE5043/METRIBUZIN APPLIED PREPLANT INCORPORATED TOLERANCE OF TOMATOES TO ISOXAFLUTOLE AND ZA1296 APPLIED PREPLANT INCORPORATED. 266 TOLERANCE OF PROCESSING TOMATOES TO SULFONYL UREA HERBICIDES POSTEMERGENCE WEED CONTROL IN TOMATOES WITH RIMSULFURON AND THIFENSULFURON-METHYL TANKMIXES TOLERANCE OF TOMATOES TO POSTEMERGENCE APPLIED HERBICIDES TOMATO TOLERANCE TO POSTEMERGENCE HERBICIDES TOMATO TOLERANCE TO THIFENSULFURON-METHYL I TOMATO TOLERANCE TO THIFENSULFURON-METHYL II TOMATO TOLERANCE TO THIFENSULFURON-METHYL III Vine Crops: CROP TOLERANCE AND HERBICIDE EFFICACY IN SQUASH CROP TOLERANCE AND HERBICIDE EFFICACY IN PUMPKIN Winter Wheat: WHEAT CROP ROTATION TO IMAZETHAPYR TANKMIXES WHEAT CROP ROTATION TO IMAZETHAPYR TANKMIXES - II TOLERANCE OF WINTER WHEAT TO POSTEMERGENCE HERBICIDES APPLIED EARLY IN THE FALL. 284 TOLERANCE OF WINTER WHEAT TO POSTEMERGENCE HERBICIDES APPLIED LATE IN THE FALL. 286

7 1999 WEATHER DATA RAINFALL IN MM. DATE APRIL MAY JUNE JULY AUG. SEPT OCT TOTAL TEMP (C) MEAN MAX MEAN MIN MEAN