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Irish Potato, Control of Potato Infesting Aphids, 1993

Irish Potato, Control of Potato Infesting Aphids, 1993 Downloaded from https://academic.oup.com/amt/article-abstract/19/1/120/4639312 by DeepDyve user on 02 August 2020 120 Arthropod Management Tests, Vol. 19 E: VEGETABLE CROPS Rate (lb Mean score across Al/acre) or sampling dates formulated . Cumulative Treatment/ product (oz Small Large adults per Yield or qt/acre) plant formulation larvae larvae (cwt/acre) Experiment 2 1.02 a Asana 0.66XL 0.05 lb 1.04 ab 0.95 a 219.30 a 1.22 be ECX931 8 OF 0.5 qt 1.29 c-e 11.55 be 211.89 a 1.17 ab ECX 9318 OF 1.0 qt 1.20 a-d 10.10 be 252.48 a 1.14 ab ECX 9318 OF 1.5 qt 1.10 a-c 2.60 ab 205.29 a ECX 9373 AF 0.5 qt 1.26 be 16.40 cd 1.33 de 243.30 a ECX 9373 AF 1.0 qt 1.27 be 1.34 de 9.15 be 244.01 a ECX 9373 AF 1.5 qt 1.21 be 1.39 de 11.95 be 239.90 a ECX 9373 OF 0.5 qt 1.32 c-e 7.25 be 229.20 a 1.30 be ECX 9373 OF 1.0 qt 1.18 a-d 225.09 a 1.25 be 7.70 be ECX 9373 OF 1.5 qt 1.31 c-e 246.86 a 1.31 be 10.90 b-d Foil BFC OF 0.5 qt 1.26 b-e 8.90 be 234.19 a 1.28 be Furadan 4F 0.5 lb 1.02 a 0.90 a 212.69 a 1.01 a Margosan-O 0.3% 0.044 lb 1.50 ef 18.35 cd 245.70 a 1.42 c Untreated control 1.67 f 31.75 d 237.50 a 1.41 c Means within a column followed by the same letter are not significantly different (P 0.05, Ryan's Q test). All data were transformed (log X, + 1) for statistical analysis. Rate (lb Mean score across Al/acre) or sampling dates formulated . Cumulative Treatment/ product (oz Small Large adults per Yield or qt/acre) plant (cwt/acre) formulation larvae larvae Experiment 3 1.01 a Asana 0.66XL 0.05 lb 1.16 a 1.90 a 214.57 a 1.19 be Cryolite 96WP 11.5 lb 1.37 be 23.30 be 189.94 a 1.24 b-d Foil BFC OF 0.75 qt 1.41 c 27.60 be 222.06 a 1.27 cd Foil BFC OF 1.0 qt 22.35 be 208.32 a 1.34 be Foil BFC OF 2.0 qt 1.11 ab 32.45 be 220.37 a 1.17 ab Foil BFC OF 3.0 qt 234.19 a 1.09 ab 1.10 a 9.15 b 1.0 qt 215.01 a Novodor FC 1.21 b-d 1.26 a-c 23.15 be 199.67 a Novodor FC 2.0 qt 1.10 a 36.50 be 1.12 ab 215.90 a Novodor FC 3.0 qt 1.13 a 1.12 ab 8.90 b Untreated control 1.66 d 226.52 a 1.36 d 47.85 c Means within a column followed by the same letter are not significantly different (P 0.05, Ryan's Q test). All data were transformed (log X, + 1) for statistical analysis. POTATO: Solarium tuberosum L. 'Katahdin' Gary H. Sewell HE) Buckthorn aphid; Aphis nasturtii Kaltenbach Aroostook Farm Foxglove aphid; Acyrthosiphon solani (Kaltenbach) Presque Isle, ME 04769 Potato aphid; Macrosiphum euphorbiae (Thomas) Richard H. Storch Green peach aphid; Myzus persicae (Sulzer) Dept. of Entomology University of ME Orono, ME 04469 IRISH POTATO, CONTROL OF POTATO INFESTING APHIDS, 1993: The experiment was a randomized complete block design replicated six times and was conducted at Presque Isle, ME on land that was in clover in 1992. It was planted 21 May. The 3.0 m space between blocks and the 1.8 m space between the four-row plots were sown to oats on 1 Jul. All rows were planted with an assisted-feed planter 0.9 m apart and 15.0 m long and the healthy whole Katahdin seed (ca. 75 g) were 30 cm apart. Fertilizer and hilling practices were normal for the area. Early and late blight were controlled by seven foliar applications of a flowable maneb (4F) (2.3 to 3.5 liter/ha). Furrow granular applications of insecticides were made by hand with a plastic tube applying previously weighed amounts of insecticide. Furrow liquids were applied with a sprinkle can. Foliar insecticide applications were made with a Century boom sprayer, three nozzles per row at 6.3 kg/cm pressure and 0.94 kliter/ha. Numbers of aphids (by species) were counted on a top, a middle, and a bottom leaf on 25 plants in the middle rows of each plot. When dates of count and application were the same, aphid counts were made prior to applications of the insecticide. Analyses of variance were calculated following transformation of the data using log (x + 1). H) Transformed means of the total number of wingless aphids were compared using Fisher's LSD Test and then applied to the actual means. The soil was Downloaded from https://academic.oup.com/amt/article-abstract/19/1/120/4639312 by DeepDyve user on 02 August 2020 E: VEGETABLE CROPS Arthropod Management Tests, Vol. 19 121 classified as Caribou Loam, pH 5.2. Total monthly rainfall for Jun, Jul, and Aug was respectively 14.0, 5.0, 7.6 cm. The average temperature for each of the same 3 months was 15.0, 18.5 and 19.0 °C. The populations of buckthorn and green peach aphids were higher than in 1992, but potato aphid populations were lower than in 1992. Composition of the 1993 aphid populations by species as follows: early Jul—buckthorn 43%, and potato aphid 57%; late Jul—buckthorn 35%, and potato aphid 65%; early Aug—buckthorn 23%, green peach 2%, and potato aphid 75%; late Aug—buckthorn 60%, green peach 6%, and potato aphid 34%. The combination of DiSyston and Monitor had constantly the fewest numbers of aphids until the last count date in Aug. The addition of Incite to Monitor was more efficacious than Monitor alone. No obvious specificity of a material for an aphid species was noted and no phytotoxicity was observed. Means of all aphid species Rate Application Treatment (formulation) g (AI)/ha dates 26 Jul 2 Aug 9 Aug 16 Aug 23 Aug 31 Aug Aphid exp. 34.2a NTN33893 (240FS) 348 2 Jul 29.0d 1.3a 2.7a 24.0c 5.0ab NTN33893 (240FS) 348 21 May 19.2a 18.5cd 0.7a 0.0a 13.5bc 2.8ab DiSyston (15G) + 3363 21 May Monitor (4E) 1121 3 Aug 0.8a 1.2a 1.3a 2.0a 10.5b 30.0a DiSyston (15G) + 3363 21 May NTN33893 (240FS) 53 3, 19 Aug 0.3a 35.2a 8.5bc ll.Obc 1.2a 1.2a Monitor (4E) + 841 X-77 (0.25% v/v) (pH adjusted to 5.0) 18.5b 331.2b 5.8ab 8.0b 3.7ab 11.0b 3 Aug Monitor (4E) + Incite (8EC) 560 3 Aug 32.3b 337.7b 8.7bc 1.8a 2.0a 14.0b Monitor (4E) 841 3 Aug 46.3b 330.3b 7.2ab 11.5bc 6.5b 29.5c Any two means sharing a common letter within a column are not significantly different (Fisher's LSD test; P = .05). POTATO: Solarium tuberosum L. 'Katahdin' Gary H. Sewell (82E) Colorado potato beetle; Leptinotarsa decemlineata (Say) Aroostook Farm Presque Isle, ME 04769 Richard H. Storch Dept. of Entomology University of Maine Orono, ME 04469 IRISH POTATO, CONTROL OF COLORADO POTATO BEETLE WITH EXP60434A (FIPRONIL), 1991: The experiment was a ran­ domized complete block design with six replicates and was planted on 16 May at Presque Isle, ME on land that was in clover in 1990. The 3.0 m space between blocks and the 1.8 m space between the four-row plots were bare soil. All rows were planted with an assisted-feed planter 0.9 m apart and 15.0 m long and the healthy whole seed (ca 75 g) were 30 cm apart. Fertilization and hilling practices were normal for the area. Early and late blight were controlled by three foliar applications of Dithane M-45 (80WP) (1.12 kg/ha on 18 and 26 Jul; 2 Aug) and Bravo 720 (840 g/ha on 9 and 23 Aug). Foliar insecticide applications were made with a Century boom sprayer, three nozzles per row at 6.3 kg/cm pressure and 0.94 kliter/ha. Numbers of larvae and adults were counted on 25 whole plants in the middle rows of each plot. When dates of count and application were the same, beetle counts were made prior to application of insecticides. Analyses of variance were calculated following transformations of data using log (x + 1). Transformed H1 means of the sum of larvae and adult beetles were compared using Fisher's LSD test and then applied to the actual means. The soil was classified as Caribou Loam, pH 5.2. Total monthly rainfall for Jun, Jul, and Aug was respectively 3.7, 1.9, and 21.7 cm. The average temperature for each of the same 3 months was 17.1, 19.0 and 19.3 °C. The week after the initial treatment there were significantly fewer insects in the EXP60434A plots than in Asana or Kryocide. Additional applications of all materials did not significantly alter the numbers of insects but yields in Kryocide and the low rate of EXP60434A were significantly lower than the other two treatments. After the first week of Aug there was tremendous adult pressure on the experiment. No phytotoxicity was observed. Mean Mean number of larvae and adults Rate (g yield 16 Jul 23 Jul 30 Jul 6 Aug Treatment fAI]/ha) Application dates 22 Aug (Kg) Asana (0.66EC) 56 17 Jul; 8, 15 Aug 476.7a 48.5b 59.5ab 165.7a 217.5a 84.8b EXP60434A (80WG) 28 17 Jul; 7, 15 Aug 455.0a 4.5a 44.3a 178.8a 135.5a 75.2b Kryocide (96W) 12890 17 Jul; 7, 14 Aug 451.5a 30.3b 67.7ab 218.3a 218.2a 62.1a EXP60434A (80WG) 13 17 Jul; 7, 15 Aug 515.5a 17.0a 94.7b 212.7a 132.5a 60.0a Any two means sharing a common letter within a column are not significantly different (Fisher's LSD test; P = .05). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Irish Potato, Control of Potato Infesting Aphids, 1993

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© 1994, Entomological Society of America
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2155-9856
DOI
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Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/19/1/120/4639312 by DeepDyve user on 02 August 2020 120 Arthropod Management Tests, Vol. 19 E: VEGETABLE CROPS Rate (lb Mean score across Al/acre) or sampling dates formulated . Cumulative Treatment/ product (oz Small Large adults per Yield or qt/acre) plant formulation larvae larvae (cwt/acre) Experiment 2 1.02 a Asana 0.66XL 0.05 lb 1.04 ab 0.95 a 219.30 a 1.22 be ECX931 8 OF 0.5 qt 1.29 c-e 11.55 be 211.89 a 1.17 ab ECX 9318 OF 1.0 qt 1.20 a-d 10.10 be 252.48 a 1.14 ab ECX 9318 OF 1.5 qt 1.10 a-c 2.60 ab 205.29 a ECX 9373 AF 0.5 qt 1.26 be 16.40 cd 1.33 de 243.30 a ECX 9373 AF 1.0 qt 1.27 be 1.34 de 9.15 be 244.01 a ECX 9373 AF 1.5 qt 1.21 be 1.39 de 11.95 be 239.90 a ECX 9373 OF 0.5 qt 1.32 c-e 7.25 be 229.20 a 1.30 be ECX 9373 OF 1.0 qt 1.18 a-d 225.09 a 1.25 be 7.70 be ECX 9373 OF 1.5 qt 1.31 c-e 246.86 a 1.31 be 10.90 b-d Foil BFC OF 0.5 qt 1.26 b-e 8.90 be 234.19 a 1.28 be Furadan 4F 0.5 lb 1.02 a 0.90 a 212.69 a 1.01 a Margosan-O 0.3% 0.044 lb 1.50 ef 18.35 cd 245.70 a 1.42 c Untreated control 1.67 f 31.75 d 237.50 a 1.41 c Means within a column followed by the same letter are not significantly different (P 0.05, Ryan's Q test). All data were transformed (log X, + 1) for statistical analysis. Rate (lb Mean score across Al/acre) or sampling dates formulated . Cumulative Treatment/ product (oz Small Large adults per Yield or qt/acre) plant (cwt/acre) formulation larvae larvae Experiment 3 1.01 a Asana 0.66XL 0.05 lb 1.16 a 1.90 a 214.57 a 1.19 be Cryolite 96WP 11.5 lb 1.37 be 23.30 be 189.94 a 1.24 b-d Foil BFC OF 0.75 qt 1.41 c 27.60 be 222.06 a 1.27 cd Foil BFC OF 1.0 qt 22.35 be 208.32 a 1.34 be Foil BFC OF 2.0 qt 1.11 ab 32.45 be 220.37 a 1.17 ab Foil BFC OF 3.0 qt 234.19 a 1.09 ab 1.10 a 9.15 b 1.0 qt 215.01 a Novodor FC 1.21 b-d 1.26 a-c 23.15 be 199.67 a Novodor FC 2.0 qt 1.10 a 36.50 be 1.12 ab 215.90 a Novodor FC 3.0 qt 1.13 a 1.12 ab 8.90 b Untreated control 1.66 d 226.52 a 1.36 d 47.85 c Means within a column followed by the same letter are not significantly different (P 0.05, Ryan's Q test). All data were transformed (log X, + 1) for statistical analysis. POTATO: Solarium tuberosum L. 'Katahdin' Gary H. Sewell HE) Buckthorn aphid; Aphis nasturtii Kaltenbach Aroostook Farm Foxglove aphid; Acyrthosiphon solani (Kaltenbach) Presque Isle, ME 04769 Potato aphid; Macrosiphum euphorbiae (Thomas) Richard H. Storch Green peach aphid; Myzus persicae (Sulzer) Dept. of Entomology University of ME Orono, ME 04469 IRISH POTATO, CONTROL OF POTATO INFESTING APHIDS, 1993: The experiment was a randomized complete block design replicated six times and was conducted at Presque Isle, ME on land that was in clover in 1992. It was planted 21 May. The 3.0 m space between blocks and the 1.8 m space between the four-row plots were sown to oats on 1 Jul. All rows were planted with an assisted-feed planter 0.9 m apart and 15.0 m long and the healthy whole Katahdin seed (ca. 75 g) were 30 cm apart. Fertilizer and hilling practices were normal for the area. Early and late blight were controlled by seven foliar applications of a flowable maneb (4F) (2.3 to 3.5 liter/ha). Furrow granular applications of insecticides were made by hand with a plastic tube applying previously weighed amounts of insecticide. Furrow liquids were applied with a sprinkle can. Foliar insecticide applications were made with a Century boom sprayer, three nozzles per row at 6.3 kg/cm pressure and 0.94 kliter/ha. Numbers of aphids (by species) were counted on a top, a middle, and a bottom leaf on 25 plants in the middle rows of each plot. When dates of count and application were the same, aphid counts were made prior to applications of the insecticide. Analyses of variance were calculated following transformation of the data using log (x + 1). H) Transformed means of the total number of wingless aphids were compared using Fisher's LSD Test and then applied to the actual means. The soil was Downloaded from https://academic.oup.com/amt/article-abstract/19/1/120/4639312 by DeepDyve user on 02 August 2020 E: VEGETABLE CROPS Arthropod Management Tests, Vol. 19 121 classified as Caribou Loam, pH 5.2. Total monthly rainfall for Jun, Jul, and Aug was respectively 14.0, 5.0, 7.6 cm. The average temperature for each of the same 3 months was 15.0, 18.5 and 19.0 °C. The populations of buckthorn and green peach aphids were higher than in 1992, but potato aphid populations were lower than in 1992. Composition of the 1993 aphid populations by species as follows: early Jul—buckthorn 43%, and potato aphid 57%; late Jul—buckthorn 35%, and potato aphid 65%; early Aug—buckthorn 23%, green peach 2%, and potato aphid 75%; late Aug—buckthorn 60%, green peach 6%, and potato aphid 34%. The combination of DiSyston and Monitor had constantly the fewest numbers of aphids until the last count date in Aug. The addition of Incite to Monitor was more efficacious than Monitor alone. No obvious specificity of a material for an aphid species was noted and no phytotoxicity was observed. Means of all aphid species Rate Application Treatment (formulation) g (AI)/ha dates 26 Jul 2 Aug 9 Aug 16 Aug 23 Aug 31 Aug Aphid exp. 34.2a NTN33893 (240FS) 348 2 Jul 29.0d 1.3a 2.7a 24.0c 5.0ab NTN33893 (240FS) 348 21 May 19.2a 18.5cd 0.7a 0.0a 13.5bc 2.8ab DiSyston (15G) + 3363 21 May Monitor (4E) 1121 3 Aug 0.8a 1.2a 1.3a 2.0a 10.5b 30.0a DiSyston (15G) + 3363 21 May NTN33893 (240FS) 53 3, 19 Aug 0.3a 35.2a 8.5bc ll.Obc 1.2a 1.2a Monitor (4E) + 841 X-77 (0.25% v/v) (pH adjusted to 5.0) 18.5b 331.2b 5.8ab 8.0b 3.7ab 11.0b 3 Aug Monitor (4E) + Incite (8EC) 560 3 Aug 32.3b 337.7b 8.7bc 1.8a 2.0a 14.0b Monitor (4E) 841 3 Aug 46.3b 330.3b 7.2ab 11.5bc 6.5b 29.5c Any two means sharing a common letter within a column are not significantly different (Fisher's LSD test; P = .05). POTATO: Solarium tuberosum L. 'Katahdin' Gary H. Sewell (82E) Colorado potato beetle; Leptinotarsa decemlineata (Say) Aroostook Farm Presque Isle, ME 04769 Richard H. Storch Dept. of Entomology University of Maine Orono, ME 04469 IRISH POTATO, CONTROL OF COLORADO POTATO BEETLE WITH EXP60434A (FIPRONIL), 1991: The experiment was a ran­ domized complete block design with six replicates and was planted on 16 May at Presque Isle, ME on land that was in clover in 1990. The 3.0 m space between blocks and the 1.8 m space between the four-row plots were bare soil. All rows were planted with an assisted-feed planter 0.9 m apart and 15.0 m long and the healthy whole seed (ca 75 g) were 30 cm apart. Fertilization and hilling practices were normal for the area. Early and late blight were controlled by three foliar applications of Dithane M-45 (80WP) (1.12 kg/ha on 18 and 26 Jul; 2 Aug) and Bravo 720 (840 g/ha on 9 and 23 Aug). Foliar insecticide applications were made with a Century boom sprayer, three nozzles per row at 6.3 kg/cm pressure and 0.94 kliter/ha. Numbers of larvae and adults were counted on 25 whole plants in the middle rows of each plot. When dates of count and application were the same, beetle counts were made prior to application of insecticides. Analyses of variance were calculated following transformations of data using log (x + 1). Transformed H1 means of the sum of larvae and adult beetles were compared using Fisher's LSD test and then applied to the actual means. The soil was classified as Caribou Loam, pH 5.2. Total monthly rainfall for Jun, Jul, and Aug was respectively 3.7, 1.9, and 21.7 cm. The average temperature for each of the same 3 months was 17.1, 19.0 and 19.3 °C. The week after the initial treatment there were significantly fewer insects in the EXP60434A plots than in Asana or Kryocide. Additional applications of all materials did not significantly alter the numbers of insects but yields in Kryocide and the low rate of EXP60434A were significantly lower than the other two treatments. After the first week of Aug there was tremendous adult pressure on the experiment. No phytotoxicity was observed. Mean Mean number of larvae and adults Rate (g yield 16 Jul 23 Jul 30 Jul 6 Aug Treatment fAI]/ha) Application dates 22 Aug (Kg) Asana (0.66EC) 56 17 Jul; 8, 15 Aug 476.7a 48.5b 59.5ab 165.7a 217.5a 84.8b EXP60434A (80WG) 28 17 Jul; 7, 15 Aug 455.0a 4.5a 44.3a 178.8a 135.5a 75.2b Kryocide (96W) 12890 17 Jul; 7, 14 Aug 451.5a 30.3b 67.7ab 218.3a 218.2a 62.1a EXP60434A (80WG) 13 17 Jul; 7, 15 Aug 515.5a 17.0a 94.7b 212.7a 132.5a 60.0a Any two means sharing a common letter within a column are not significantly different (Fisher's LSD test; P = .05).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 1994

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