Proceedings of the Sixty-first Annual Meeting of the Northeastern ...

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154 PORTRAIT OF THE HEALTH STATUS OF LAKES: C. Rivard-Sirois, RAPPEL, Quebec, Canada. ABSTRACT Following the request made by several resident associations, since 2004, RAPPEL, has developed a new protocol for diagnosing the condition of the lakes in the Eastern Townships (Quebec), primarily Lake Memphremagog. The project consists of building a realistic portrait of the lakes’ health status and identifying their problem areas. Two of the critical symptoms of accelerated eutrophication; silting up and sea weed invasion (both macrophyte and periphyton), are analyzed in combination with physiochemical analyses reports of the quality of water collected in recent years. Through the introduction of this study, RAPPEL hopes to educate the locals on the importance of keeping Lake Memphremagog healthy, as an important ecological, economic and social interest for the Eastern Townships. ------------ Camille Rivard-Sirois is a Biologist from Sherbrooke University in Quebec, Canada. She is currently the Quality Assurance Coordinator for lakes and waterways with RAPPEL, which is a Collective Association for the Environment, Lakes, and Waterways of Eastern Townships and the Upper St. Francois Basin. 136
155 BIOLOGICAL CONTROL OF EURASIAN WATERMILFOIL BY THE MOTH AND WEEVIL: FACT AND FICTION. R.L. Johnson, P.H. Lord, and J.M. Riggs, Cornell University Research Ponds, Ithaca, NY. ABSTRACT The control of excessive growth of the submersed aquatic invasive Eurasian watermilfoil (Myriophyllum spicatum) by indigenous insect herbivores is well documented in Canadian, North Eastern and North Central US lakes. Two insects, a pyralid moth (Acentria ephemerella) and a weevil (Euhrychiopsis lecontei) are most often associated with severe herbivore damage to this plant pest. Control studies in Vermont, Minnesota and New York using laboratory containers and field enclosures show significant decreases in the growth of watermilfoil caused by herbivory. Our analysis of long-term field monitoring of Eurasian watermilfoil growth in Sterling Pond, Cayuga, Chautauqua and Dryden Lakes continues to implicate moth and weevil herbivory as the major reason for seasonal and long-term plant damage limiting watermilfoil growth. The importance of a potential robust native plant community able to compete with damaged watermilfoil appears to be a requirement in documented natural declines of Eurasian watermilfoil in Vermont, Minnesota and New York. These findings contributed to attempts to rear and use specific life stages of these two insects to augment and consequently increase their in-lake populations. Populations feeding on watermilfoil need to be enormous, at greater that 0.6 moth life stages and 2.0 weevil life stages on each apical meristem to cause substantial watermilfoil damage. We will present several examples of moth and weevil augmentations and analyze potential for success or failure. A lack of understanding of the biological control agent’s biology appears to be a major factor in failed population increases. We will explore these misconceptions and suggest new facts. ------------ Robert L. Johnson is the Manager of the Cornell University Research Ponds that support research, teaching and Cornell Cooperative Extension activities in Aquatic Ecology. Personal research utilizes the Research Ponds and numerous lakes throughout New York State to concentrate on investigating factors that influence aquatic plant growth. Current studies focus on the aquatic plant pest, Eurasian watermilfoil, and assess the effects that insect herbivores have on its growth in New York Lakes. In addition, since 1966, a major task is to provide aquatic plant information through outreach programs in New York State to Cornell Cooperative Extension, New York Department of Environmental Conservation, lake associations, soil and water conservation districts and watershed groups. 137
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1 Proceedings of the Sixty-first An
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3 NORTHEASTERN WEED SCIENCE SOCIETY
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5 SECTION CHAIRS Agronomy Chair: J.
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7 CARFENTRAZONE AND QUINCLORAC FOR
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9 THE EFFICACY AND CROP TOLERANCE O
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11 EVALUATION OF HERBICIDES FOR CON
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13 BEING HEARD BY THE IR-4 PROJECT.
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15 ABSTRACTS FROM THE 7 TH CONFEREN
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17 HERBICIDE NAMES: COMMON, TRADE,
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20 INTEGRATING WEED CONTROL STRATEG
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22 GIANT HOGWEED ERADICATION IN PEN
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24 EFFECTS OF EMERGENCE PERIODICITY
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26 PRODUCER AND PRODUCTION IMPACTS
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28 A SIMPLE METHOD FOR CLEANING TUF
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30 EMERGENCE AND PERFORMANCE OF TWO
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32 CARFENTRAZONE AND QUINCLORAC FOR
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34 2006 NEWSS SUMMER WEED CONTEST R
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36 INVASIVE AQUATIC WEEDS IN NORTH
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38 AMMONIUM PELARGONATE AS A BIOHER
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40 TRINEXAPAC-ETHYL INFLUENCES EFFI
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42 Table 1. Insect feeding damage,
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44 WEED CONTROL WITH TOPRAMEZONE PR
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46 ROTARY HOE EFFICACY IN CORN: INF
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48 ALFALFA/GRASS FORAGE MIXTURES US
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50 CONTROL OF NEW WEED SPECIES IN T
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52 Table 1. Results of 2006 contain
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54 TOLERANCES OF ORNAMENTAL SHRUBS
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56 2006 WEED MANAGEMENT TRIALS IN C
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58 THE RESPONSE OF FIELD AND CONTAI
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60 THE EFFICACY AND CROP TOLERANCE
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62 Table 2. Plant quality ratings o
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64 EVALUATION OF PROLINE-LINKED PEN
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66 ANNUAL BLUEGRASS AND DOLLAR SPOT
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68 Table 1. Autumn 2005 versus spri
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70 A PRELIMINARY STUDY OF THE NON-N
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72 native species, covering and smo
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74 EFFECTS OF BUCKWHEAT RESIDUE ON
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76 Japanese knotweed control 28 DAT
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78 ENHANCED TOLERANCE TO WEED COMPE
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80 EFFECTS OF PLANTING AND TERMINAT
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82 A UNIFYING FRAMEWORK FOR SPECIES
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84 BIOLOGY OF MULTIFLORA ROSE: AN I
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86 AN OUNCE OF PREVENTION. M.J. Van
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88 HERBICIDE COMPARISON IN WET BLAD
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90 Table 1. Morrow's honeysuckle (L
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96 HOT WATER SYSTEMS FOR VEGETATION
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98 SEEDHEAD SUPPRESSION OF ANNUAL B
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100 ROUGHSTALK BLUEGRASS CONTROL WI
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102 EFFECT OF DEW AND GRANULAR FORM
Page 104 and 105: 104 USE OF TRICLOPYR TO REDUCE ANTI
Page 106 and 107: 106 YELLOW NUTSEDGE CONTROL WITH SU
Page 108 and 109: 108 PRE AND POST EMERGENT ANNUAL BL
Page 110 and 111: 110 PUMPKIN RESPONSE TO HALOSUFSULF
Page 112 and 113: 112 Figure 1. Grass cover following
Page 114 and 115: 114 CHEMICAL CONTROL OF APPLE ROOT
Page 116 and 117: 116 STRAWBERRY PLANTING YEAR WEED C
Page 118 and 119: 118 WEED CONTROL IN NO-TILL PUMPKIN
Page 120 and 121: 120 NATURAL PRODUCT POTENTIAL FOR W
Page 122 and 123: 122 THE IR-4 PROJECT: UPDATE ON HER
Page 124 and 125: 124 PEDIGREE OF A PESTICIDE. D.R. S
Page 126 and 127: 126 SEEDHEAD SUPPRESSION OF ANNUAL
Page 128 and 129: 128 APPLICATIONS FOR SULFENTRAZONE
Page 130 and 131: 130 HORSEWEED: FROM OBSCURITY TO TH
Page 132 and 133: 132 RECENT FINDINGS ON THE FIELD BE
Page 134 and 135: 134 HORSEWEED RESPONSE TO NO-TILL P
Page 136 and 137: 136 THE MASSACHUSETTS EXAMPLE: ONE
Page 138 and 139: 138 Supplemental NEWSS Abstracts (p
Page 140 and 141: 140 ABSTRACTS AND BIOGRAPHIES FOR P
Page 142 and 143: 142 EVALUATION OF AN HERBICIDE APPL
Page 144 and 145: 144 ALUMINUM TREATMENT FOR PHOSPHOR
Page 146 and 147: 146 BIOLOGICAL CONTROL OF AQUATIC W
Page 148 and 149: 148 THE 2002 FARM BILL AND ITS EFFE
Page 150 and 151: 150 LAND USE PRACTICE IMPACTS ON NO
Page 152 and 153: 152 A NEW STANDARD FOR DEFINING AQU
Page 156 and 157: 156 TEN YEARS OF VARIABLE WATER MIL
Page 158 and 159: 158 Northeastern Weed Science Socie
Page 160 and 161: 160 meeting attendance numbers have
Page 162 and 163: 162 members or to members of the Ex
Page 164 and 165: 164 primary areas that had increase
Page 166 and 167: 166 1 st place: Evaluation of Kentu
Page 168 and 169: 168 d) Resolutions Committee Appoin
Page 170 and 171: 170 2005, Hilary Sandler and Brent
Page 172 and 173: 172 (Ornamentals), Rakesh Chandran
Page 174 and 175: 174 Total Expenses $38,227.24 Total
Page 176 and 177: 176 PUBLIC RELATIONS Brent Lackey A
Page 178 and 179: 178 • 2 nd place team: Guelph tea
Page 180 and 181: 180 WSSA REPRESENTATIVE Jeffrey Der
Page 182 and 183: 182 b. Legislative Visits training
Page 184 and 185: 184 b. Selection of a WSSA Member f
Page 186 and 187: 186 WSSA Provides Comments to the C
Page 188 and 189: 188 $179 million, in contrast to a
Page 190 and 191: 190 NEWSS PAST PRESIDENTS Gilbert H
Page 192 and 193: 192 1986 John R. Havis University o
Page 194 and 195: 194 DISTINGUISHED MEMBERS 2002 Brad
Page 196 and 197: 196 1991 1 Elizabeth Maynard Cornel
Page 198 and 199: 198 COLLEGIATE WEED CONTEST WINNERS
Page 200 and 201: 200 1996 - Penn State Agronomy Farm
Page 202 and 203: 202 RESEARCH POSTER AWARDS 1983 1.
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204 1998 1. Weed Control Studies wi
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206 INNOVATOR OF THE YEAR 1986 Nath
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208 1960 The Influence of Cultivati
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210 1975 1. Control of Jimsonweed a
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212 1985 1. Peach Response to Sever
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214 Chris Benedict Cornell Universi
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216 Robert A. DeWaine Monsanto 505
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218 Robert Hedberg USDA/CSREES Scie
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220 Brian G Lackey Weeds Inc. 250 B
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222 Thomas Molloy University of Mai
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224 John Roy RWC, Inc. PO Box 876 2
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226 John R. Teasdale USDA-ARS Build
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228 HERBICIDE NAMES: COMMON, TRADE,
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230 Common Name Trade Name Chemical
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238 COMMON PRE-PACKAGED HERBICIDES
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240 Trade Name Resolve SG Rhino Rou
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242 COMMON AND CHEMICAL NAMES OF HE
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244 Heck, G.R., 114 Henry, G.M., 15
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246 MAIN SUBJECT INDEX (Herbicides,
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248 glyphosate, 29, 38, 39, 57, 70,
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250 shepherd's purse, 56 s-metolach
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