University of GA Coop Ext Service Postemergence Broadleaf Weed Control with Penoxsulam in Bermudagrass.

Transcription

1 (TURF33-04) Site Description Page 1 of 5 University of G Coop Ext Service Trial ID: Turf33-04 Study Director: Bill Nutt Location: Griffin Investigator: Tim R Murphy General Trial Information Study Director: Bill Nutt Title: RC I ffiliation: UG-CES bnutt@griffin.uga.edu Investigator: Tim R Murphy Title: Weed Scientist ffiliation: UG-CES tmurphy@uga.edu Trial Location City: Griffin Trial Status: ONE-YER/FINL State/Prov.: G Initiation Date: Cooperator/Landowner Cooperator: Darin Lickfeldt Organization: DowgroSciences City: Fayetteville State/Prov: G Crop Description Crop 1: CYND Cynodon dactylon Bermudagrass Pest Description Pest 1 Type: W Code: DIORE Dichondra repens Pest 2 Type: W Code: RNS Ranunculus sardous Pest 3 Type: W Code: MODC Modiola caroliniana Common Name: Dichondra Common Name: Buttercup, hairy Common Name: Mallow, bristly Site and Design Plot Width, Unit: 5 FT Site Type: home lawn Plot Length, Unit: 6 FT Replications: 3 Study Design: Randomized Complete Block Trial Initiation Comments: Plot size is 5 feet by 6 feet. Three (3) untreated alleys located between Rep 1 and 2, and Rep 2 and 3. Field Prep./Maintenance: Non-irrigated site. Mowed at 2.0 inches. pplication Description pplication Date: Time of Day: 8:30 am pplication Method: Broadcast pplication Timing: Post pplication Placement: Foliar ir Temperature, Unit: 59 F % Relative Humidity: 67 Wind Velocity, Unit: 0.6 mph Dew Presence (Y/N): Y Soil Temperature, Unit: 56 F Soil Moisture: Poor % Cloud Cover: 30

2 (TURF33-04) Site Description Page 2 of 5 Crop Stage t Each pplication Crop 1 Code,: CYND Stage Majority, Percent: Green 15% Height Minimum, Maximum: in Pest Stage t Each pplication Pest 1 Code, Disc., Scale: DIORE W Stage Majority, Percent: ctive Growth Height, Unit: 1 in Pest 2 Code, Disc., Scale: RNS W Stage Majority, Percent: Early Flower Diameter, Unit 3 5 in Height Minimum, Maximum in Pest 3 Code, Disc., Scale: MODC W Stage Majority, Percent: Early Flower Diameter, Unit: 6 8 in Runner pplication Equipment ppl. Equipment: Backpack Operating Pressure: 26 Pressure Unit: psi Nozzle Type: Flat fan Nozzle Size: 8004 Nozzle Spacing, Unit: 20 inch Boom Length, Unit: 5 ft Boom Height, Unit: 20 in Ground Speed, Unit: 3 mph Carrier: water Spray Volume: 25 Volume Unit: GL/C Propellant: CO2 Tank Mix (Y/N): N Trial Comments Hairy buttercup, RNS, is maturing and dying in untreated plots and outside of the test area Hairy buttercup, RNS, has died out in untreated plots. No Bermudagrass, CYND, injury. St. ugustine in plot area showed excellent tolerance to granular and sprayable penoxsulam Heavy growth of Crabgrass, St. ugustinegrass, and Bermudagrass due to recent rains and infrequent mowing have made it impossible to get accurate Dichondra ratings on this date.

3 (TURF33-04) OV Means Table Page 3 of 5 Pest Code DIORE DIORE DIORE DIORE Name Dichondra Dichondra Dichondra Dichondra Rating Date Rating Data Type Density Density Density Density Rating Unit Trt-Eval Interval 0 D- 14 D- 27 D- 53 D- Trt Treatment Form Form Rate Growth ppl 1 Penoxsulam 2 SC 0.01 lb ai/a ctive 23 a 35 a 47 abc 37 a-d 2 Penoxsulam 2 SC 0.02 lb ai/a ctive 7 a 6 a 13 cd 17 de 3 Penoxsulam 2 SC 0.04 lb ai/a ctive 11 a 22 a 29 a-d 27 bcd 4 Penoxsulam 2 SC 0.06 lb ai/a ctive 17 a 35 a 55 ab 40 a-d 5 Penoxsulam 2 SC 0.09 lb ai/a ctive 13 a 37 a 53 abc 48 ab 6 Penoxsulam (GF-1380) GR lb/a ctive 20 a 30 a 45 abc 30 a-d 7 Penoxsulam (GF-1381) GR lb/a ctive 5 a 14 a 22 bcd 22 cde 8 Penoxsulam (GF-1382) GR lb/a ctive 12 a 28 a 43 abc 45 abc 9 Penoxsulam (GF-1383)) GR lb/a ctive 15 a 33 a 50 abc 40 a-d 10 Penoxsulam (GF-1384) GR lb/a ctive 18 a 33 a 47 abc 48 ab 11 Trimec Classic 3.32 EC 4.0 pt/a ctive 18 a 25 a 1 d 0 e 12 Greenview Spring 1.06 GR lb/a ctive 17 a 30 a 48 abc 17 de 13 Fert Check ( ) GR lb/a ctive 25 a 33 a 65 a 37 a-d 14 Untreated Check ctive 15 a 32 a 70 a 55 a LSD (P=.05) Standard Deviation CV

4 (TURF33-04) OV Means Table Page 4 of 5 Pest Code RNS RNS RNS Crop Code CYND Name H.Buttercup H.Buttercup H.Buttercup Bermuda Rating Date Rating Data Type Density Density Density Injury Rating Unit Trt-Eval Interval 0 D- 0 D- 27 D- 14 D- Trt Treatment Form Form Rate Growth ppl 1 Penoxsulam 2 SC 0.01 lb ai/a ctive 7 a 5 a 1 a 0 a 2 Penoxsulam 2 SC 0.02 lb ai/a ctive 5 a 4 a 0 a 0 a 3 Penoxsulam 2 SC 0.04 lb ai/a ctive 2 a 7 a 4 a 0 a 4 Penoxsulam 2 SC 0.06 lb ai/a ctive 0 a 2 a 1 a 0 a 5 Penoxsulam 2 SC 0.09 lb ai/a ctive 2 a 3 a 1 a 0 a 6 Penoxsulam (GF-1380) GR lb/a ctive 2 a 1 a 1 a 0 a 7 Penoxsulam (GF-1381) GR lb/a ctive 4 a 3 a 1 a 0 a 8 Penoxsulam (GF-1382) GR lb/a ctive 5 a 4 a 0 a 0 a 9 Penoxsulam (GF-1383)) GR lb/a ctive 7 a 2 a 0 a 0 a 10 Penoxsulam (GF-1384) GR lb/a ctive 3 a 4 a 1 a 0 a 11 Trimec Classic 3.32 EC 4.0 pt/a ctive 0 a 0 a 0 a 0 a 12 Greenview Spring 1.06 GR lb/a ctive 1 a 1 a 0 a 0 a 13 Fert Check ( ) GR lb/a ctive 3 a 3 a 2 a 0 a 14 Untreated Check ctive 2 a 5 a 4 a 0 a LSD (P=.05) Standard Deviation CV

5 (TURF33-04) OV Means Table Page 5 of 5 Crop Code CYND Name Bermuda Rating Date Rating Data Type Injury Rating Unit Trt-Eval Interval 27 D- Trt Treatment Form Form Rate Growth ppl 1 Penoxsulam 2 SC 0.01 lb ai/a ctive 0 a 2 Penoxsulam 2 SC 0.02 lb ai/a ctive 0 a 3 Penoxsulam 2 SC 0.04 lb ai/a ctive 0 a 4 Penoxsulam 2 SC 0.06 lb ai/a ctive 0 a 5 Penoxsulam 2 SC 0.09 lb ai/a ctive 0 a 6 Penoxsulam (GF-1380) GR lb/a ctive 0 a 7 Penoxsulam (GF-1381) GR lb/a ctive 0 a 8 Penoxsulam (GF-1382) GR lb/a ctive 0 a 9 Penoxsulam (GF-1383)) GR lb/a ctive 0 a 10 Penoxsulam (GF-1384) GR lb/a ctive 0 a 11 Trimec Classic 3.32 EC 4.0 pt/a ctive 0 a 12 Greenview Spring 1.06 GR lb/a ctive 0 a 13 Fert Check ( ) GR lb/a ctive 0 a 14 Untreated Check ctive 0 a LSD (P=.05) 0.0 Standard Deviation 0.0 CV 0.0 Means followed by same letter do not significantly differ (P=.05, Duncan's New MRT)