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Control of Resistant Colorado Potato Beetle in Early Market Potato, Big Lake, Mn, 1993

Control of Resistant Colorado Potato Beetle in Early Market Potato, Big Lake, Mn, 1993 Downloaded from https://academic.oup.com/amt/article-abstract/19/1/115/4639306 by DeepDyve user on 02 August 2020 E: VEGETABLE CROPS Arthropod Management Tests, Vol. 19 115 Date and Avg 29 Jun 7 Jul 20 Jul 31 Jul Percent Percent Percent Percent Treatment and Larval" defoli­ Larval defoli­ Larval defoli­ Larval defoli­ Yield formulation Rate lb Al/acre* rating ation rating ation rating ation rating ation cwt/acre Regent (fipronil) 80WG .1 0.8 g-i 3e- f 0.5 f 4 e 0.3 f 0.0 e 4 f 310 a-e 3 g Vydate 2S .75 1.0 f-i 4e- f 1.0 ef 6 e 0.8 ef 0.5 c-e 10 c-f 308 a-e 5 g Kryocide 96W 12 lb 2.1 de 5c- f 1.9 de 9d e 1.3 c-e 10 fg 1.3 a-d 16 c-f 297 b-f Asana XL .66E .0375 2.4 de 8c d 2.3 d 13 de 1.8 b-d 12 e-g 2.0 a 24 cd 297 b-f M-Trak 6 pts P 1.0 f-i 3e- f 1.3 ef 6 e 1.3 c-e 0.5 c-e 10 c-f 296 b-f 8 g Imidan 75W 1.0 + PBO 8E 10:1 2.9 cd 8c d 3.3 be 18cd 1.5 b-e 19 d-f 1.0 a-e 24 cd 291 c-g Admire 2F 1.3 fl. oz/1000 row ft 0.0 i 1 f 1.0 ef 4 e 0.8 ef 1.3 a-d 14 c-f 286 c-g 5 g Methyl Parathion 2E .5 + Thiodan 3E .75 6 c-e 2.3 d 13 de 1.8 b-d 13 e-g 1.5 a-c 23 c-e 280 d-h 1.8 e-g Cryolite 96WG 12 lb 1.9 d-f 5c- f 1.9 de 9d e 2.0 be 13 e-g 0.8 b-e 15 c-f 276 d-h Furadan 4F 1.0 3.8 a-c 13 ab 3.8 ab 26 be 2.3 b 33 a-c 1.5 a-c 44 b 254 e-h TD 2341 1.8F 1.5 pt P 3.6 be 16 a 3.6 a-c 25 be 1.1 c-f 23c~ e 1.3 a-d 43 b 242 f-h Monitor 4E 0.75 4.7 a 15 a 4.4 a 48 a 1.5 b-e 36 ab 1.3 a-d 46 b 238 f-h Untreated 4.3 ab 14 ab 3.6 a—c 25 be 3.5 a 39 a 0.8 b-e 68 a 232 f-h Thiodan 3E 1.0 2.1 de 5c- f 2.8 cd 13 de 1.5 b-e 12 e-g 1.8 ab 25 c 231 gh Guthion 3F 0.5 3.5 be 9 be 3.9 ab 34 b 1.5 b-e 28 b-d 2.0 a 45 b 216 h LSD (P = 0.05) 1.07 4.9 0.88 10.1 1.00 11.2 1.24 17.5 65.1 "Larval rating 0 = None, 5 = >50/plant. ''Except where noted by P (product). Means within a column followed by the same letter are not significantly different (P 0.05). POTATO: Solarium tuberosum L. 'Goldrush' (75E) David Noetzel and Jennifer Miller Colorado potato beetle (CPB); Leptinotarsa decemlineata (Say) Department of Entomology University of Minnesota St. Paul, MN 55108 CONTROL OF RESISTANT COLORADO POTATO BEETLE IN EARLY MARKET POTATO, BIG LAKE, MN, 1993: Continued failure of most insecticides for control of CPB in the Anoka Sand Plains growing area stimulated further comparisons of biologicals, inorganics, and synthetic materials for CPB management. Soils are sands at this location. Plots were established in an irrigated commercial potato field. The individual plot consisted of 4—25 ft rows with a row width of 3 ft. Treatments were arranged in a randomized complete block design and were replicated 4 times. The grower treated all of the field, including the plots, with Thiodan and Asana XL at 1.0 lb and 0.5 lb Al/acre respectively on 8 Jul and 16 Jul. Plot treatments were applied on 25 Jun, 6 and 19 Jul using a C0 hand sprayer with about 20 gals total material/acre and 40 psi pressure. Larval ratings and defoliation estimates were taken on 6 and 19 Jul. Vines were killed on 3 Aug and yields collected on 18 Aug. The center 2 rows of each plot were harvested for yield. CPB populations were lower than in 1992, and later in relation to the phenology of the potato. This CPB population has high resistance to Furadan, Penncap-M and Monitor and moderate resistance to Thiodan, Imidan and combinations of all of these compounds. Novodor, Guthion, Cryolite, and Kryocide performed well as shown by yield. However defoliation in the Guthion plots suggest it too is failing. Avg 6 Jul 19 Jul Treatment/ Rate Larval Yield % defoli­ Larval % defoli­ fc formulation lb. Al/acre" rating ation rating'' ation cwt/acre Karate IE 0.0375 0.8 fg 6 d-f 0.8 fg 9d e 288 a Novodor 6 pts P 1.0 e-g 6 d-f 1.0 f 9d e 281 ab Guthion 3F 0.5 2.0 c-f 6 d-f 2.3 cd 19 c-e 277 ab Cryolite 96WG 12.0 lb 1.3 c-g 7 d-f 1.3 ef 11 de 277 ab Kryocide 96WP 12.0 lb 1.5 d-g 8 c-f l.Of 9d e 273 a-c Asana XL .66E 0.0375 2.3 b-e 8 c-f 0.8 fg 16 c-e 272 a-c Baythroid IE 0.05 0.5 g 4 f 0.3 gh 6 e 272 a-c Furadan 4F 1.0 2.0 a-c 17 a-d 3.1 ab 44 ab 269 a-c TD 2341 1.8F 2 pt P 2.0 c-f 8 c-f l.Of 11 de 268 a-c Regent 80WG 0.05 0.3 g 6e f 0.0 h 8d e 265 a-d Continued Downloaded from https://academic.oup.com/amt/article-abstract/19/1/115/4639306 by DeepDyve user on 02 August 2020 116 Arthropod Management Tests, Vol. 19 E: VEGETABLE CROPS Avg 6 Jul 19 Jul Treatment/ Rate Larval % defoli­ Larval % defoli­ Yield formulation lb. Al/acre" rating* ation rating* ation cwt/acre Admire 2F 0.094 (foliar) 1.3 e-g 5e f 0.3 gh 7d e 260 a-d Admire 2F 0.6 (in row) 1.0 e-g 3 f 0.8 fg 6d e 251 a-e Fury 1.5E 0.0375 1.5 d-g 6e f 0.8 fg 6d e 247 a-e TD 2341 1.8F 1 pt P 2.8 a-d 13b- f 1.8 de 19c- e 245 a-e M-Trak 6.0 pts P 2.3 b-e 18 a-c 1.0 f 23 cd 245 a-e Monitor 4E 0.75 3.9 a 22 ab 2.8 be 44 ab 241 b-e Thiodan 3E 2.0 d 21 c-e 231 c-e 1.0 2.3 b-e 11 b-f Vydate 2S 0.75 2.3 b-e 13 b- f 2.0 d 18c- e 228 c-e Imidan 50WP 1.0 3.0 a-c 15a- e 2.0 d 29 be 220 de Untreated 3.5 ab 25 a 3.8 a 48 a 208 e 0.74 LSD (P = 0.05) 1.49 10.8 16.5 45.2 " Except where noted by P (product). * Larval rating 0 = none, 5 = highest on date. Means within a column followed by the same letter are not significantly different (P = 0.05). POTATO: Solatium tuberosum L. 'Goldrush' David Noetzel and Jennifer Miller (76E) Colorado potato beetle (CPB); Leptinotarsa decemlineata (Say) Department of Entomology University of Minnesota St. Paul, MN 55108 CONTROL OF RESISTANT COLORADO POTATO BEETLE; REGENT DOSAGE STUDY, BIG LAKE, MN, 1993: The trial was located in an area where there were high levels of resistance to 3 classes of insecticides. Plots consisted of 4—25 ft rows with a row width of 3 ft. Treatments were arranged in a randomized complete block design and were replicated 3 times. The entire plot area was treated on 8 Jul with Thiodan 3E at 1.0 lb Al/acre and on 16 Jul with Asana XL ,66E at 0.05 lb Al/acre. Plot treatments were applied on 25 Jun, 6 and 19 Jul using a C0 hand sprayer. About 10 gal of total material per acre was applied at 40 psi pressure. Larval ratings and estimates of defoliation were taken on 6 and 19 Jul. Vines were killed on 3 Aug and yields recorded on 18 Aug. CPB populations were moderately high at this location. This CPB population was completely resistant to labeled dosages of Furadan 4F, Penncap M 2F, Thimet 20G and Monitor. All dosages of Regent 80WG and the high dosage of Decis .2IE performed superior to check. Avg 6 Jul 19 Jul Percent Percent Early Treatment/ Rate lb Larval defoli­ Larval defoli­ blight Yield 1 2 formulation Al/acre rating ation rating ation rating cwt/acre 0.0167 Decis .2IE 1.7 d-f 7 c 1.3 cd 12 be 2.7 ac 230 a Regent 80WG 0.1 0.3 f 4 c 0.3 d 7 c 1.8 be 202 ab Regent 80WG 0.05 0.3 f 6 c 0.7 d 8 c 3.3 ab 193 ab Regent 80WG 0.025 0.7 ef 7 c 0.7 d 10 c 2.3 a-c 184ab Sevin XLR plus 4F 1.0 2.0 c-d 10c 1.3 cd 15 be 3.2 a-c 177 a-c Decis .2IE 0.0045 3.7 ab 23 ab 2.3 be 30 b 2.2 a-c 163 be Asana XL .66E 0.02 2.3 b-c 16 be 2.0 c 18 be 1.7 c 162 be Untreated 3.3 a-c 28 a 3.3 ab 62 a 3.3 ab 159 be Penncap M 2F 0.5 4.7 a 28 a 3.7 a 77 a 3.7 a 123 c LSD (P = 0.05) 1.61 12.3 1.15 19.6 1.66 58.3 Larval rating 0 = none, 5 = >25/plant. Early blight rating 0 = none, 5 = severe. Means within a column followed by the same letter are not significantly different (P = 0.05). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Control of Resistant Colorado Potato Beetle in Early Market Potato, Big Lake, Mn, 1993

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Publisher
Oxford University Press
Copyright
© 1994, Entomological Society of America
eISSN
2155-9856
DOI
10.1093/amt/19.1.115
Publisher site
See Article on Publisher Site

Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/19/1/115/4639306 by DeepDyve user on 02 August 2020 E: VEGETABLE CROPS Arthropod Management Tests, Vol. 19 115 Date and Avg 29 Jun 7 Jul 20 Jul 31 Jul Percent Percent Percent Percent Treatment and Larval" defoli­ Larval defoli­ Larval defoli­ Larval defoli­ Yield formulation Rate lb Al/acre* rating ation rating ation rating ation rating ation cwt/acre Regent (fipronil) 80WG .1 0.8 g-i 3e- f 0.5 f 4 e 0.3 f 0.0 e 4 f 310 a-e 3 g Vydate 2S .75 1.0 f-i 4e- f 1.0 ef 6 e 0.8 ef 0.5 c-e 10 c-f 308 a-e 5 g Kryocide 96W 12 lb 2.1 de 5c- f 1.9 de 9d e 1.3 c-e 10 fg 1.3 a-d 16 c-f 297 b-f Asana XL .66E .0375 2.4 de 8c d 2.3 d 13 de 1.8 b-d 12 e-g 2.0 a 24 cd 297 b-f M-Trak 6 pts P 1.0 f-i 3e- f 1.3 ef 6 e 1.3 c-e 0.5 c-e 10 c-f 296 b-f 8 g Imidan 75W 1.0 + PBO 8E 10:1 2.9 cd 8c d 3.3 be 18cd 1.5 b-e 19 d-f 1.0 a-e 24 cd 291 c-g Admire 2F 1.3 fl. oz/1000 row ft 0.0 i 1 f 1.0 ef 4 e 0.8 ef 1.3 a-d 14 c-f 286 c-g 5 g Methyl Parathion 2E .5 + Thiodan 3E .75 6 c-e 2.3 d 13 de 1.8 b-d 13 e-g 1.5 a-c 23 c-e 280 d-h 1.8 e-g Cryolite 96WG 12 lb 1.9 d-f 5c- f 1.9 de 9d e 2.0 be 13 e-g 0.8 b-e 15 c-f 276 d-h Furadan 4F 1.0 3.8 a-c 13 ab 3.8 ab 26 be 2.3 b 33 a-c 1.5 a-c 44 b 254 e-h TD 2341 1.8F 1.5 pt P 3.6 be 16 a 3.6 a-c 25 be 1.1 c-f 23c~ e 1.3 a-d 43 b 242 f-h Monitor 4E 0.75 4.7 a 15 a 4.4 a 48 a 1.5 b-e 36 ab 1.3 a-d 46 b 238 f-h Untreated 4.3 ab 14 ab 3.6 a—c 25 be 3.5 a 39 a 0.8 b-e 68 a 232 f-h Thiodan 3E 1.0 2.1 de 5c- f 2.8 cd 13 de 1.5 b-e 12 e-g 1.8 ab 25 c 231 gh Guthion 3F 0.5 3.5 be 9 be 3.9 ab 34 b 1.5 b-e 28 b-d 2.0 a 45 b 216 h LSD (P = 0.05) 1.07 4.9 0.88 10.1 1.00 11.2 1.24 17.5 65.1 "Larval rating 0 = None, 5 = >50/plant. ''Except where noted by P (product). Means within a column followed by the same letter are not significantly different (P 0.05). POTATO: Solarium tuberosum L. 'Goldrush' (75E) David Noetzel and Jennifer Miller Colorado potato beetle (CPB); Leptinotarsa decemlineata (Say) Department of Entomology University of Minnesota St. Paul, MN 55108 CONTROL OF RESISTANT COLORADO POTATO BEETLE IN EARLY MARKET POTATO, BIG LAKE, MN, 1993: Continued failure of most insecticides for control of CPB in the Anoka Sand Plains growing area stimulated further comparisons of biologicals, inorganics, and synthetic materials for CPB management. Soils are sands at this location. Plots were established in an irrigated commercial potato field. The individual plot consisted of 4—25 ft rows with a row width of 3 ft. Treatments were arranged in a randomized complete block design and were replicated 4 times. The grower treated all of the field, including the plots, with Thiodan and Asana XL at 1.0 lb and 0.5 lb Al/acre respectively on 8 Jul and 16 Jul. Plot treatments were applied on 25 Jun, 6 and 19 Jul using a C0 hand sprayer with about 20 gals total material/acre and 40 psi pressure. Larval ratings and defoliation estimates were taken on 6 and 19 Jul. Vines were killed on 3 Aug and yields collected on 18 Aug. The center 2 rows of each plot were harvested for yield. CPB populations were lower than in 1992, and later in relation to the phenology of the potato. This CPB population has high resistance to Furadan, Penncap-M and Monitor and moderate resistance to Thiodan, Imidan and combinations of all of these compounds. Novodor, Guthion, Cryolite, and Kryocide performed well as shown by yield. However defoliation in the Guthion plots suggest it too is failing. Avg 6 Jul 19 Jul Treatment/ Rate Larval Yield % defoli­ Larval % defoli­ fc formulation lb. Al/acre" rating ation rating'' ation cwt/acre Karate IE 0.0375 0.8 fg 6 d-f 0.8 fg 9d e 288 a Novodor 6 pts P 1.0 e-g 6 d-f 1.0 f 9d e 281 ab Guthion 3F 0.5 2.0 c-f 6 d-f 2.3 cd 19 c-e 277 ab Cryolite 96WG 12.0 lb 1.3 c-g 7 d-f 1.3 ef 11 de 277 ab Kryocide 96WP 12.0 lb 1.5 d-g 8 c-f l.Of 9d e 273 a-c Asana XL .66E 0.0375 2.3 b-e 8 c-f 0.8 fg 16 c-e 272 a-c Baythroid IE 0.05 0.5 g 4 f 0.3 gh 6 e 272 a-c Furadan 4F 1.0 2.0 a-c 17 a-d 3.1 ab 44 ab 269 a-c TD 2341 1.8F 2 pt P 2.0 c-f 8 c-f l.Of 11 de 268 a-c Regent 80WG 0.05 0.3 g 6e f 0.0 h 8d e 265 a-d Continued Downloaded from https://academic.oup.com/amt/article-abstract/19/1/115/4639306 by DeepDyve user on 02 August 2020 116 Arthropod Management Tests, Vol. 19 E: VEGETABLE CROPS Avg 6 Jul 19 Jul Treatment/ Rate Larval % defoli­ Larval % defoli­ Yield formulation lb. Al/acre" rating* ation rating* ation cwt/acre Admire 2F 0.094 (foliar) 1.3 e-g 5e f 0.3 gh 7d e 260 a-d Admire 2F 0.6 (in row) 1.0 e-g 3 f 0.8 fg 6d e 251 a-e Fury 1.5E 0.0375 1.5 d-g 6e f 0.8 fg 6d e 247 a-e TD 2341 1.8F 1 pt P 2.8 a-d 13b- f 1.8 de 19c- e 245 a-e M-Trak 6.0 pts P 2.3 b-e 18 a-c 1.0 f 23 cd 245 a-e Monitor 4E 0.75 3.9 a 22 ab 2.8 be 44 ab 241 b-e Thiodan 3E 2.0 d 21 c-e 231 c-e 1.0 2.3 b-e 11 b-f Vydate 2S 0.75 2.3 b-e 13 b- f 2.0 d 18c- e 228 c-e Imidan 50WP 1.0 3.0 a-c 15a- e 2.0 d 29 be 220 de Untreated 3.5 ab 25 a 3.8 a 48 a 208 e 0.74 LSD (P = 0.05) 1.49 10.8 16.5 45.2 " Except where noted by P (product). * Larval rating 0 = none, 5 = highest on date. Means within a column followed by the same letter are not significantly different (P = 0.05). POTATO: Solatium tuberosum L. 'Goldrush' David Noetzel and Jennifer Miller (76E) Colorado potato beetle (CPB); Leptinotarsa decemlineata (Say) Department of Entomology University of Minnesota St. Paul, MN 55108 CONTROL OF RESISTANT COLORADO POTATO BEETLE; REGENT DOSAGE STUDY, BIG LAKE, MN, 1993: The trial was located in an area where there were high levels of resistance to 3 classes of insecticides. Plots consisted of 4—25 ft rows with a row width of 3 ft. Treatments were arranged in a randomized complete block design and were replicated 3 times. The entire plot area was treated on 8 Jul with Thiodan 3E at 1.0 lb Al/acre and on 16 Jul with Asana XL ,66E at 0.05 lb Al/acre. Plot treatments were applied on 25 Jun, 6 and 19 Jul using a C0 hand sprayer. About 10 gal of total material per acre was applied at 40 psi pressure. Larval ratings and estimates of defoliation were taken on 6 and 19 Jul. Vines were killed on 3 Aug and yields recorded on 18 Aug. CPB populations were moderately high at this location. This CPB population was completely resistant to labeled dosages of Furadan 4F, Penncap M 2F, Thimet 20G and Monitor. All dosages of Regent 80WG and the high dosage of Decis .2IE performed superior to check. Avg 6 Jul 19 Jul Percent Percent Early Treatment/ Rate lb Larval defoli­ Larval defoli­ blight Yield 1 2 formulation Al/acre rating ation rating ation rating cwt/acre 0.0167 Decis .2IE 1.7 d-f 7 c 1.3 cd 12 be 2.7 ac 230 a Regent 80WG 0.1 0.3 f 4 c 0.3 d 7 c 1.8 be 202 ab Regent 80WG 0.05 0.3 f 6 c 0.7 d 8 c 3.3 ab 193 ab Regent 80WG 0.025 0.7 ef 7 c 0.7 d 10 c 2.3 a-c 184ab Sevin XLR plus 4F 1.0 2.0 c-d 10c 1.3 cd 15 be 3.2 a-c 177 a-c Decis .2IE 0.0045 3.7 ab 23 ab 2.3 be 30 b 2.2 a-c 163 be Asana XL .66E 0.02 2.3 b-c 16 be 2.0 c 18 be 1.7 c 162 be Untreated 3.3 a-c 28 a 3.3 ab 62 a 3.3 ab 159 be Penncap M 2F 0.5 4.7 a 28 a 3.7 a 77 a 3.7 a 123 c LSD (P = 0.05) 1.61 12.3 1.15 19.6 1.66 58.3 Larval rating 0 = none, 5 = >25/plant. Early blight rating 0 = none, 5 = severe. Means within a column followed by the same letter are not significantly different (P = 0.05).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 1994

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