IR-4 Ornamental Horticulture Program Research Report Cover Sheet

Transcription

1 IR4 Ornamental Horticulture Program Research Report over Sheet Researcher(s) Mark zarnota Affiliation: University of Georgia Dept. of Horticulture 1109 Experiment St. Griffin GA PhoneNumber: (770) Trial: 2007 GA Protocol #: ProjectTitle: 2007 Sedge Materials rop Safety PR# Research Target rop/plant Product EPA Reg. # Production Site Status Hardy Mum BAS 659H G (dime Dendranthema x morifoli Dimethenamidp Hardy Mum 0.3G Dendranthema x morifoli FM Hydrangea BAS 659H G (dime Hydrangea sp. Dimethenamidp Hydrangea 0.3G Hydrangea sp. FM Hydrangea Tower (BAS 656h Hydrangea sp. Dimethenamidp Holly BAS 659H G (dime Ilex sp. Dimethenamidp Holly 0.3G Ilex sp. FM Holly Tower (BAS 656h Ilex sp. Dimethenamidp Shrub Verbena BAS 659H G (dime Lantana sp. Dimethenamidp Shrub Verbena 0.3G Lantana sp. FM Loropetalum BAS 659H G (dime Loropetalum sp. Dimethenamidp Loropetalum 0.3G Loropetalum sp. FM Loropetalum Tower (BAS 656h Loropetalum sp. Dimethenamidp Rose BAS 659H G (dime Rosa sp. Dimethenamidp Rose 0.3G Rosa sp. FM

2 IR4 Ornamental Horticulture Program Research Report over Sheet Researcher(s) Mark zarnota Affiliation: University of Georgia Dept. of Horticulture 1109 Experiment St. Griffin GA PhoneNumber: (770) Trial: 2007 GA Rose Tower (BAS 656h Rosa sp. Dimethenamidp Protocol #: ProjectTitle: Dimethenamidp rop Safety PR# Research Target rop/plant Product EPA Reg. # Production Site Status hrysanthemum Tower (BAS 656h Dendranthema sp. Dimethenamidp Shrub Verbena Tower (BAS 656h Lantana sp. Dimethenamidp Protocol #: ProjectTitle: Flumioxazin rop Safety PR# Research Target rop/plant Product EPA Reg. # Production Site Status hrysanthemum BroadStar 0.25G Dendranthema sp. Flumioxazin Valent Hydrangea BroadStar 0.25G Hydrangea sp. Flumioxazin Valent Holly BroadStar 0.25G Ilex sp. Flumioxazin Valent Shrub Verbena BroadStar 0.25G Lantana sp. Flumioxazin Valent Loropetalum BroadStar 0.25G Loropetalum sp. Flumioxazin Valent Rose BroadStar 0.25G Rosa sp. Flumioxazin Valent Protocol #: ProjectTitle: Nutsedge & Sedge Efficacy PR# Research Target rop/plant Product EPA Reg. # Production Site Status Nutsedge, Yellow BAS 659H G (dime yperus esculentus Dimethenamidp +

3 IR4 Ornamental Horticulture Program Research Report over Sheet Researcher(s) Mark zarnota Affiliation: University of Georgia Dept. of Horticulture 1109 Experiment St. Griffin GA PhoneNumber: (770) Trial: 2007 GA Nutsedge, Yellow BroadStar 0.25G yperus esculentus Flumioxazin Valent Nutsedge, Yellow 0.3G yperus esculentus FM Nutsedge, Yellow Showcase yperus esculentus Trifluralin + Isoxab Dow AgroScie Nutsedge, Yellow Tower (BAS 656h yperus esculentus Dimethenamidp Protocol #: ProjectTitle: Trifluralin + Isoxaben + Oxyfluorfen rop Safety PR# Research Target rop/plant Product EPA Reg. # Production Site Status Hardy Mum Showcase Dendranthema x morifoli Trifluralin + Isoxab Dow AgroScie Hydrangea, French Showcase Hydrangea macrophylla Trifluralin + Isoxab Dow AgroScie Holly Showcase Ilex sp. Trifluralin + Isoxab Dow AgroScie Shrub Verbena Showcase Lantana sp. Trifluralin + Isoxab Dow AgroScie Loropetalum Showcase Loropetalum sp. Trifluralin + Isoxab Dow AgroScie Rose Showcase Rosa sp. Trifluralin + Isoxab Dow AgroScie

4 PROTOOL TITLE: Herbicide safety and Yellow Nutsedge ontrol in ontainerized Ornamentals with and and BAS 659H. PROTOOL #: INTRODUTION: Safety of sulfentrazone,, and halosulfuron on select containerized ornamentals. MATERIALS AND METHODS: On July 6, 2007, study was initiated. 48 one gallon pots of each of the following species was assembled: hrysanthemum x Sheffield Pink (Hardy Mum Sheffield Pink ), Lantana New Gold (Lantana New Gold ), Ilex x onaf (Oak Leaf Red Holly ), Loropetalum chinense rubrum (hinese Loropetalum), Rosa Nearly Wild ( Nearly Wild Floribunda Rose), Hydrangea macophylla Nikko Blue (Nikko Blue Bigleaf Hydrangea). All plants were sized up from liners in May of Liners were sized using Fafard 52 mix (one of several industry standards). Farfard 52 has a bulk density of 17 to 20 pounds per cubic feet, and a ph range is 5.5 to 6.5. The mix contains processed pine bark, peat moss, vermiculite, and perlite. All plants also received a slow release fertilizer application (~1 Tablespoon of a Osmocote or Polyon). Before herbicide applications were applied, 4 plants of each species were assembled in a 6 x 6 area. Also included in the 6 x 6 area was four one gallon pot containing five tubers of Yellow Nutsedge (yperus esculentus). Herbicide applications were made to 28 pots in the 6' x 6' area. Granular herbicides were preweighed (to cover 36 ft 2 ), and uniformly applied with a cheese shaker jar. Sprays were applied with a O 2 backpack sprayer calibrated to deliver 20 gallons per acre (GPA). After herbicide treatments were applied, pots were moved to assigned test area where they were arranged in a randomized complete block (RB) design of 4 replications. Treatments were repeated on August 6, 2007.Watering occurred at least one time daily, but was varied occurring to weather. Each water event provided approximately one half inch of water. The treatment list was as follows: Treatment Number Treatment Name Formulation Application Rate / Acre GR 125 lbs pr/a GR 250 lbs pr/a GR 500 lbs pr/a 4 6 E 21 oz pr/a 5 6 E 42 oz pr/a 6 6 E 84 oz pr/a 7 BAS 659H 1.75 GR 150 lbs pr/a BAS 659H 1.75 GR 300 lbs pr/a 1

5 8 9 BAS 659H 1.75 GR 600 lbs pr/a 10 Showcase 2.5 GR 100 lbs pr/a 11 Broadstar 0.25 GR 100 lbs pr/a 12 UT Ratings for plant damage and yellow nutsedge control were taken at 1, 2, 4, 6, and 10 weeks after first treatment (WAT). Plant injury was taken on a (0100 scale) and numbers represented the following: Value Plant Symptoms 0 No visual injury present 1030 Minimal injury to desirable plant. Less than 10% of the plant leaf service area showing chlorosis and necrosis More noticeable plant injury or stunting. Greater than 50% of the leaf area showing symptoms of chlorosis and/or necrosis Plants severally injured. Most of the leaves and leaf surface showing signs of chlorosis and necrosis. 100 Plant appears dead. No signs of regrowth. Yellow nutsedge control ratings were on a 0 to 100 scale, and numerical values represented the following: Value ontrol 0 No control as compared to the check 10 to 30 Very poor weed control as compared to the check. Only a 10 to 30 % weed biomass reduction. Some chlorosis and necrosis evident in emerged weeds. 40 to 60 Poor weed control as compared to the check. 40 to 60 % weed biomass reduction. More 2

6 noticeable injury or stunting to emerged weeds. More pronounced chlorosis and/or necrosis to the leaf area of emerged weeds. 70 to 90 Fair to good weed control. 70 to 90 % weed biomass reduction. Emerged weeds severally injured or dead. Greater than 50% of leaf surface showing signs of chlorosis and necrosis. 90 to 99 Excellent weed control. Greater than 90% weed biomass reduction. Emerged weeds mostly dead and/or severally injured (chlorotic and/or necrotic). 100 Emerged weeds dead, and no evidence of weed regrowth. Data was analyzed using analysis of variance and means were exposed to Fisher=s least significant difference (LSD) test with a significance level of α=0.05. RESULTS: Significant damage occurred with several of the herbicide on Hardy Mum Sheffield Pink, Lantana New Gold, Oak Leaf Red Holly, hinese Loropetalum, and Nearly Wild Floribunda Rose, but damage did not exceed 25% (see attached tables). Although significant damage to Nikko Blue Bigleaf Hydrangea was noted at all rating periods, damage never exceed 50% and generally affected robustness of the plant (see attached tables). ontrol yellow nutsedge was variable and not reliable because of poor tuber germination. ONLUSIONS: It appears that and and BAS 659H could be utilized as herbicides to select containerized ornamentals. All herbicides were applied overthetop and minimal significant injury was seen on select ornamentals (major on bigleaf hydrangea). Injury would probably be acceptable to most growers on most ornamentals. Yellow nutsedge tuber germination was poor and statements on control by these herbicides cannot be made from this experiment. 3

7 3/8/08 (OR1207) AOV Means Table Page 1 of 6 University of Georgia, Dept. of Hort. Herbicide safety and Weed ontrol in Ornamentals IR4. Trial ID: OR1207 Location: Griffin, GA Protocol ID: OR1207 Study Director: Dr. risti Palmer Investigator: Dr. Mark zarnota Pest Type W Weed W Weed W Weed W Weed W Weed Pest ode YPES YPES YPES YPES YPES Pest Name Yellow nuts> Yellow nuts> Yellow nuts> Yellow nuts> Yellow nuts> rop ode HRSH HRSH rop Name hrsanthymum hrsanthymum Part Rated LEAF P LEAF P LEAF P LEAF P LEAF P LEAGRE LEAGRE Rating Date 7/14/07 7/20/07 8/3/07 8/23/07 9/14/07 7/14/07 7/20/07 Rating Data Type DAMHER DAMHER DAMHER DAMHER DAMHER DAMHER DAMHER Rating Unit percent percent percent percent percent percent percent Days After First/Last Applic TrtEval Interval 1 WAT 2 WAT 4 WAT 6 WAT 10 WAT 1 WAT 2 WAT Number of Decimals Trt Treatment Rate No. Name Rate Unit lb/a 98 a 99 a 75 b 100 a 100 a 5 a 0 b 125 lb/a lb/a 100 a 100 a 100 a 100 a 100 a 0 a 3 b 250 lb/a lb/a 98 a 100 a 100 a 100 a 100 a 5 a 3 b 500 lb/a 4 21 fl oz/a 100 a 100 a 100 a 100 a 100 a 0 a 0 b 21 fl oz/a 5 42 fl oz/a 100 a 100 a 100 a 100 a 100 a 3 a 5 b 42 fl oz/a 6 84 fl oz/a 100 a 100 a 100 a 100 a 100 a 5 a 15 a 84 fl oz/a 7 BAS 659H 150 lb/a 98 a 99 a 100 a 100 a 100 a 0 a 0 b BAS 659H 150 lb/a 8 BAS 659H 300 lb/a 75 b 100 a 100 a 100 a 100 a 0 a 0 b BAS 659H 300 lb/a 9 BAS 659H 600 lb/a 100 a 100 a 100 a 100 a 100 a 5 a 5 b BAS 659H 600 lb/a 10 Showcase 100 lb/a 100 a 99 a 100 a 100 a 75 ab 3 a 0 b Showcase 100 lb/a 11 BroadStar 100 lb/a 100 a 100 a 100 a 88 b 50 b 3 a 0 b BroadStar 100 lb/a 12 Untreated ontrol 95 ab 0 b 98 a 0 c 50 b 3 a 0 b LSD (P=.05) Standard Deviation V Bartlett's X P(Bartlett's X2) 0.001* * Replicate F Replicate Prob(F) Treatment F Treatment Prob(F) Means followed by same letter do not significantly differ (P=.05, LSD) 4

8 3/8/08 (OR1207) AOV Means Table Page 2 of 6 University of Georgia, Dept. of Hort. Pest Type Pest ode Pest Name rop ode HRSH HRSH HRSH LANA LANA LANA LANA rop Name hrsanthymum hrsanthymum hrsanthymum Lantana Lantana Lantana Lantana Part Rated LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE Rating Date 8/3/07 8/23/07 9/14/07 7/14/07 7/20/07 8/3/07 8/23/07 Rating Data Type DAMHER DAMHER DAMHER DAMHER DAMHER DAMHER DAMHER Rating Unit percent percent percent percent percent percent percent Days After First/Last Applic TrtEval Interval 4 WAT 6 WAT 10 WAT 1 WAT 2 WAT 4 WAT 6 WAT Number of Decimals Trt Treatment Rate No. Name Rate Unit lb/a 0 b 0 b 0 a 0 b 8 ab 0 a 0 a 125 lb/a lb/a 0 b 0 b 0 a 0 b 8 ab 0 a 0 a 250 lb/a lb/a 0 b 3 ab 0 a 0 b 10 a 0 a 0 a 500 lb/a 4 21 fl oz/a 0 b 0 b 0 a 0 b 5 abc 0 a 0 a 21 fl oz/a 5 42 fl oz/a 0 b 0 b 0 a 0 b 5 abc 0 a 0 a 42 fl oz/a 6 84 fl oz/a 0 b 21 a 25 a 0 b 8 ab 0 a 0 a 84 fl oz/a 7 BAS 659H 150 lb/a 0 b 3 ab 5 a 3 a 8 ab 0 a 0 a BAS 659H 150 lb/a 8 BAS 659H 300 lb/a 0 b 3 ab 13 a 0 b 0 c 0 a 0 a BAS 659H 300 lb/a 9 BAS 659H 600 lb/a 0 b 3 ab 25 a 0 b 3 bc 0 a 0 a BAS 659H 600 lb/a 10 Showcase 100 lb/a 5 a 3 ab 3 a 0 b 3 bc 0 a 0 a Showcase 100 lb/a 11 BroadStar 100 lb/a 0 b 5 ab 0 a 0 b 0 c 0 a 0 a BroadStar 100 lb/a 12 Untreated ontrol 3 ab 0 b 0 a 0 b 0 c 0 a 0 a LSD (P=.05) Standard Deviation V Bartlett's X P(Bartlett's X2) * 0.004* Replicate F Replicate Prob(F) Treatment F Treatment Prob(F) Means followed by same letter do not significantly differ (P=.05, LSD) 5

9 3/8/08 (OR1207) AOV Means Table Page 3 of 6 University of Georgia, Dept. of Hort. Pest Type Pest ode Pest Name rop ode LANA ILEOK ILEOK ILEOK ILEOK ILEOK LORH LORH rop Name Lantana Holly, Oakl> Holly, Oakl> Holly, Oakl> Holly, Oakl> Holly, Oakl> hinese Fri> hinese Fri> Part Rated LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE Rating Date 9/14/07 7/14/07 7/20/07 8/3/07 8/23/07 9/14/07 7/14/07 7/20/07 Rating Data Type DAMHER DAMHER DAMHER DAMHER DAMHER DAMHER DAMHER DAMHER Rating Unit percent percent percent percent percent percent percent percent Days After First/Last Applic TrtEval Interval 10 WAT 1 WAT 2 WAT 4 WAT 6 WAT 10 WAT 1 WAT 2 WAT Number of Decimals Trt Treatment Rate No. Name Rate Unit lb/a 0 a 0 a 0 b 0 a 0 a 0 b 0 c 0 a 125 lb/a lb/a 0 a 0 a 1 a 0 a 0 a 0 b 0 c 0 a 250 lb/a lb/a 0 a 0 a 0 b 0 a 0 a 0 b 0 c 0 a 500 lb/a 4 21 fl oz/a 0 a 0 a 0 b 0 a 0 a 0 b 5 ab 0 a 21 fl oz/a 5 42 fl oz/a 3 a 0 a 0 b 0 a 0 a 0 b 3 bc 0 a 42 fl oz/a 6 84 fl oz/a 0 a 0 a 0 b 0 a 0 a 0 b 8 a 0 a 84 fl oz/a 7 BAS 659H 150 lb/a 3 a 1 a 0 b 0 a 0 a 0 b 3 bc 0 a BAS 659H 150 lb/a 8 BAS 659H 300 lb/a 0 a 3 a 0 b 0 a 0 a 5 a 0 c 0 a BAS 659H 300 lb/a 9 BAS 659H 600 lb/a 0 a 3 a 0 b 0 a 0 a 0 b 3 bc 0 a BAS 659H 600 lb/a 10 Showcase 100 lb/a 3 a 3 a 0 b 0 a 0 a 0 b 0 c 0 a Showcase 100 lb/a 11 BroadStar 100 lb/a 3 a 3 a 0 b 0 a 0 a 0 b 0 c 0 a BroadStar 100 lb/a 12 Untreated ontrol 0 a 0 a 0 b 0 a 0 a 0 b 0 c 0 a LSD (P=.05) Standard Deviation V Bartlett's X P(Bartlett's X2) Replicate F Replicate Prob(F) Treatment F Treatment Prob(F) Means followed by same letter do not significantly differ (P=.05, LSD) 6

10 3/8/08 (OR1207) AOV Means Table Page 4 of 6 University of Georgia, Dept. of Hort. Pest Type Pest ode Pest Name rop ode LORH LORH LORH ROSNW ROSNW ROSNW ROSNW rop Name hinese Fri> hinese Fri> hinese Fri> Rose, Nearl> Rose, Nearl> Rose, Nearl> Rose, Nearl> Part Rated LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE Rating Date 8/3/07 8/23/07 9/14/07 7/14/07 7/20/07 8/3/07 8/23/07 Rating Data Type DAMHER DAMHER DAMHER DAMHER DAMHER DAMHER DAMHER Rating Unit percent percent percent percent percent percent percent Days After First/Last Applic TrtEval Interval 4 WAT 6 WAT 10 WAT 1 WAT 2 WAT 4 WAT 6 WAT Number of Decimals Trt Treatment Rate No. Name Rate Unit lb/a 0 a 0 a 0 a 5 b 0 a 0 a 0 a 125 lb/a lb/a 0 a 0 a 0 a 8 ab 0 a 0 a 0 a 250 lb/a lb/a 0 a 0 a 0 a 8 ab 0 a 0 a 0 a 500 lb/a 4 21 fl oz/a 0 a 0 a 10 a 8 ab 0 a 0 a 0 a 21 fl oz/a 5 42 fl oz/a 0 a 0 a 5 a 8 ab 0 a 0 a 0 a 42 fl oz/a 6 84 fl oz/a 0 a 0 a 3 a 10 a 0 a 0 a 0 a 84 fl oz/a 7 BAS 659H 150 lb/a 0 a 0 a 3 a 10 a 0 a 0 a 0 a BAS 659H 150 lb/a 8 BAS 659H 300 lb/a 0 a 0 a 0 a 8 ab 0 a 0 a 0 a BAS 659H 300 lb/a 9 BAS 659H 600 lb/a 0 a 0 a 3 a 8 ab 0 a 0 a 0 a BAS 659H 600 lb/a 10 Showcase 100 lb/a 0 a 0 a 5 a 5 b 0 a 0 a 0 a Showcase 100 lb/a 11 BroadStar 100 lb/a 0 a 0 a 3 a 10 a 0 a 0 a 0 a BroadStar 100 lb/a 12 Untreated ontrol 0 a 0 a 0 a 8 ab 0 a 0 a 0 a LSD (P=.05) Standard Deviation V Bartlett's X P(Bartlett's X2) Replicate F Replicate Prob(F) Treatment F Treatment Prob(F) Means followed by same letter do not significantly differ (P=.05, LSD) 7

11 3/8/08 (OR1207) AOV Means Table Page 5 of 6 University of Georgia, Dept. of Hort. Pest Type Pest ode Pest Name rop ode ROSNW HYDMA HYDMA HYDMA HYDMA HYDMA HYDMA rop Name Rose, Nearl> Hydrangea, > Hydrangea, > Hydrangea, > Hydrangea, > Hydrangea, > Hydrangea, > Part Rated LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE LEAGRE Rating Date 9/14/07 7/14/07 7/20/07 8/3/07 8/23/07 9/14/07 9/14/07 Rating Data Type DAMHER DAMHER DAMHER DAMHER DAMHER DAMHER WIDTH Rating Unit percent percent percent percent percent percent POS# Days After First/Last Applic TrtEval Interval 10 WAT 1 WAT 2 WAT 4 WAT 6 WAT 10 WAT 10 WAT Number of Decimals Trt Treatment Rate No. Name Rate Unit lb/a 3 a 5 abc 5 bc 20 bcd 25 abc 33 ab 36 b 125 lb/a lb/a 3 a 10 a 25 a 28 abc 25 abc 23 abc 38 ab 250 lb/a lb/a 3 a 5 abc 20 ab 15 cd 33 ab 25 abc 40 ab 500 lb/a 4 21 fl oz/a 0 a 0 c 3 c 5 cd 8 c 10 bc 40 ab 21 fl oz/a 5 42 fl oz/a 3 a 0 c 0 c 18 bcd 10 bc 15 abc 41 ab 42 fl oz/a 6 84 fl oz/a 0 a 8 ab 3 c 8 cd 8 c 28 ab 42 ab 84 fl oz/a 7 BAS 659H 150 lb/a 0 a 5 abc 0 c 40 ab 40 a 38 a 40 ab BAS 659H 150 lb/a 8 BAS 659H 300 lb/a 0 a 3 bc 5 bc 3 d 10 bc 23 abc 45 a BAS 659H 300 lb/a 9 BAS 659H 600 lb/a 0 a 3 bc 0 c 18 bcd 18 abc 18 abc 40 ab BAS 659H 600 lb/a 10 Showcase 100 lb/a 0 a 3 bc 10 abc 13 cd 8 c 28 ab 40 ab Showcase 100 lb/a 11 BroadStar 100 lb/a 0 a 10 a 15 abc 45 a 25 abc 15 abc 40 ab BroadStar 100 lb/a 12 Untreated ontrol 0 a 3 bc 0 c 3 d 3 c 0 c 46 a LSD (P=.05) Standard Deviation V Bartlett's X P(Bartlett's X2) Replicate F Replicate Prob(F) Treatment F Treatment Prob(F) Means followed by same letter do not significantly differ (P=.05, LSD) 8

12 3/8/08 (OR1207) AOV Means Table Page 6 of 6 University of Georgia, Dept. of Hort. Pest Type Pest ode Pest Name rop ode HYDMA rop Name Hydrangea, > Part Rated LEAGRE Rating Date 9/14/07 Rating Data Type HEIGHT Rating Unit POS# Days After First/Last Applic TrtEval Interval 10 WAT Number of Decimals 0 Trt Treatment Rate No. Name Rate Unit lb/a 31 ab 125 lb/a lb/a 30 ab 250 lb/a lb/a 29 b 500 lb/a 4 21 fl oz/a 33 ab 21 fl oz/a 5 42 fl oz/a 35 a 42 fl oz/a 6 84 fl oz/a 31 ab 84 fl oz/a 7 BAS 659H 150 lb/a 31 ab BAS 659H 150 lb/a 8 BAS 659H 300 lb/a 32 ab BAS 659H 300 lb/a 9 BAS 659H 600 lb/a 33 ab BAS 659H 600 lb/a 10 Showcase 100 lb/a 32 ab Showcase 100 lb/a 11 BroadStar 100 lb/a 28 b BroadStar 100 lb/a 12 Untreated ontrol 30 ab LSD (P=.05) 5.6 Standard Deviation 3.9 V Bartlett's X P(Bartlett's X2) Replicate F Replicate Prob(F) Treatment F Treatment Prob(F) Means followed by same letter do not significantly differ (P=.05, LSD) 9