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Flea Beetle Control, 1996

Flea Beetle Control, 1996 Downloaded from https://academic.oup.com/amt/article-abstract/22/1/50/4639776 by DeepDyve user on 21 July 2020 50 Arthropod Management Tests, Vol. 22 C: SMALL FRUITS BLUEBERRY: Vaccinium angustifolium Aiton 'low bush' J. A. Collins, (2C) Blueberry spanworm; ltame argillacearia (Packard) F. A. Drummond Dept. of Applied Ecology and Environmental Sciences, University of Maine, Orono, ME 04469 (207) 581-2960 SPANWOR M CONTROL, 1996B: Materials were applied on 27 May to 20 by 20 ft plots in a bearing blueberry field at Jonesboro, Maine. There were 3 replications of each treatment and a minimum 5-ft untreated buffer strip around each plot. Treatments were blocked according to prespray popula­ tion levels. Insecticides were applied at a rate of 25 gpa using a C0 -propelled 80-inch boom sprayer with 4, flat spray, 80002VS TeeJet nozzles operat­ ing at 30 psi. At treatment, larvae were second to fifth instar and plants were ca. 15% tight cluster, 80% loose cluster, and 5% bloom. On sample dates in­ dicated in table, 10 sweeps with a standard 12-inch sweep-net were taken systematically through the center area of each plot avoiding plot boundaries. The larvae were counted and then distributed back into the same plot. High winds on 26 May made sweep-net sampling difficult and may have confounded the results for that date. Imidan, Asana (both rates), and Mavrik were most effective in suppressing spanworm populations compared with the untreated check. Cryolite and Marlate were not as effective but were better than the check. Low larval counts on 6 Jun were probably due to mature larvae moving into the litter to pu­ pate. No phytotoxicity was apparent in the plots. Oz . No. blueberry spanworm larvae/10 sweeps Treatment acre 23 May* 26 May* 28 May 31 May 3 Jun Asana .66 XL 4.8 13.7a 3.7a O.Od 0.0c 0.0b Asana .66 XL 9.6 14.7a 4.0a 0.3cd 0.0c 0.3b Mavrik 22% AF 3 13.0a 1.3a 2.7abc 0.0c 2.0ab Marlate 50 W P 64 14.0a 4.0a 4.7ab 2.0ab 0.7b Imidan 70 W P 23 12.3a 3.3a 1.3bcd l.Obc 0.0b Cryolite 96% WDG 128 11.3a 3.0a 3.0abc 3.0ab 0.3b Cryolite 96% WDG 192 11.7a 2.0a 3.7abc 2.0ab 0.7b Untreated Check — 14.3a 2.7a 8.3a 5.7a 3.0a Seasonal 6 Jun density' Asana .66 XL 4.8 0.0c 0.0c Asana .66 XL 9.6 0.0c 0.2c Mavrik 22% A F 3 0.0c l.Obc Marlate 50 WP 64 0.7bc 1.6b Imidan 70 W P 23 0.7abc 0.6bc Cryolite 96 % WD G 128 0.0c 1.4b Cryolite 96% WDG 192 l.Oab 1.5b Untreated Check — 1.7a 4.1 a "Means on each date followed by the same letters are not significantly different (P<0.05; DMRT). Data were transformed by log, (X + 1) for analysis. ^Prespray count. ^Seasonal densities are trapezoidal integrals of densities over the season divided by the duration (in number of days) of the experiment. BLUEBERRY: Vaccinium angustifolium Aiton 'lowbush' J. A. Collins, (3C) Blueberry flea beetle; Altica sylvia Malloch F. A. Drummond Dept. of Applied Ecology and Environmental Sciences, University of Maine, Orono, ME 04469 (207)581-296 0 FLEA BEETLE CONTROL, 1996: Materials were applied on 6 Jun to 20 by 20 ft plots in a bearing blueberry field at Jonesport, Maine. There were 3 replications of each treatment and a minimum 5-ft untreated buffer strip around each plot. Treatments were blocked according to prespray popula­ tion levels. Insecticides were applied at a rate of 25 gpa using a C0 -propelled 80-inch boom sprayer with 4, flat spray, 8OO02VS TeeJet nozzles operat­ ing at 35 psi. At treatment, plants were ca. 50% loose cluster, 50% bloom. On sample dates indicated in table, 10 sweeps with a standard 12-inch sweep- net were taken systematically through the center area of each plot, avoiding plot boundaries. The larvae were counted and then distributed back into the same plot. No unusual weather conditions were noted during this test. Downloaded from https://academic.oup.com/amt/article-abstract/22/1/50/4639776 by DeepDyve user on 21 July 2020 C: SMALL FRUITS Arthropod Management Tests, Vol. 22 51 Imidan (all rates and both formulations) and Mavrik gave excellent control. There was an increase in the number of flea beetle larvae captured from Mavrik treated plots beginning 11 Jun. This was probably due to the shorter residual effect of Mavrik. Cryolite (both rates) and M-Trak did not signifi­ cantly reduce population levels. No phytotoxicity was apparent in the plots. Oz form./ Seasonal Treatment acre 6 Jun* 7 Jun 8 Jun 11 Jun density Imidan 2.5 EC 24 80.0a 0.0c 0.0b O.Od O.Od Imidan 2.5 EC 48 73.3a 0.0c 0.0b O.Od O.Od Imidan 70 WP 23 83.3a 0.3c 3.3b O.Od 1.4d Cryolite 96 % WDG 128 90.0a 26.7b 80.0a 100.0a 64.7ab Cryolite 96% WDG 192 83.3a 43.3ab 43.3a 86.7a 47.7c Mavrik 22% A F 3 83.3a 0.0c 3.3b 21.7c 7.8d M-Trak 96 83.3a 63.3a 100.0a 100.0a 76.3a Untreated Check 65.0a 43.3ab 76.7a 53.3b 51.0bc "Means on each date followed by the same letters are not significantly different (/ <0.05; DMRT). Data were transformed by log (X + 1) for analysis. 'Prespray count. 'Seasonal densities are trapezoidal integrals of densities over the season divided by the duration (in number of days) of the experiment. BLUEBERRY: Vaccinium angustifolium Aiton 'lowbush' J. A. Collins, (4C) Redstriped fireworm; Aroga trialbamaculella F. A. Drummond Chambers Dept. of Applied Ecology and Environmental Sciences, University of Maine, Orono, M E 04469 (207)581-296 0 FIREWORM CONTROL, 1996: Materials were applied on 19 Aug to 13 by 13 ft plots in a pruned blueberry field at Township 19, Maine. There were 3 replications of each treatment and a minimum 5-ft untreated buffer strip around each plot. Treatments were blocked according to prespray popula­ tion levels. Insecticides were applied at a rate of 25 gpa using a C0 -propelled 80-inch boom sprayer with 4, flat spray, 80002VS TeeJet nozzles operat­ ing at 35 psi. At treatment, larvae were early (green) instar and plants were at late tip die-back, early fruit bud set stage. On 16 Aug, all blueberry stems 2 2 with webbed-together leaves were counted in each of 4 ft frames per plot. On all other dates, any stems with webbed-together leaves in the same 4 ft frames were cut and examined for: 1) presence of live fireworm larvae, or 2) dead or missing larvae. Live larvae were distributed back into the same frame area. No unusual weather conditions were noted during this test. Imidan, Croylite, and Asana seemed to be effective in controlling infestation. Javelin, Agree, and Azatin were ineffective. No apparent phytoxoc- ity was noted in any plot. Oz Seasonal form./ acre 26 Aug 30 Aug 15 Sep density' Treatment 16 Aug Imidan 70 WP 23 oz 0.2c 0.2bcd 0.0b 0.10b 2.2a Cryolite 96 % WDG 192 oz 2.2a 0.4c O.Ocd 0.09b 0.0b Mavrik 22% AF 3 oz 2.2a 1.8b 0.8abc 0.8a 0.58a Asana .66 XL 2.2a 9.6 oz 0.4c O.Od 0.0b 0.05b 32 oz Javelin WG 2.2a 3.1a 1.8a 0.7a 1.01a Agree 50 WP 2.2a 16 oz 2.2ab 1.3ab 0.4ab 0.73a l.Oab Azatin 4.5 WP/WDG 21 oz 2.2a 2. la b 0.3ab 0.59a +Triton S/S 12 oz Untreated Check 2.2a 1.7b 1.6a 0.8a 0.81a "Means on each date followed by the same letters are not significantly different (P<0.05; DMRT). Data are transformed by log (X + 1) for analysis. 'Prespray count. 'Seasonal densities are trapezoidal integrals of densities over the season divided by the duration (in number of days) of the experiment. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Flea Beetle Control, 1996

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Oxford University Press
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© 1997 Entomological Society of America.
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2155-9856
DOI
10.1093/amt/22.1.50a
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Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/22/1/50/4639776 by DeepDyve user on 21 July 2020 50 Arthropod Management Tests, Vol. 22 C: SMALL FRUITS BLUEBERRY: Vaccinium angustifolium Aiton 'low bush' J. A. Collins, (2C) Blueberry spanworm; ltame argillacearia (Packard) F. A. Drummond Dept. of Applied Ecology and Environmental Sciences, University of Maine, Orono, ME 04469 (207) 581-2960 SPANWOR M CONTROL, 1996B: Materials were applied on 27 May to 20 by 20 ft plots in a bearing blueberry field at Jonesboro, Maine. There were 3 replications of each treatment and a minimum 5-ft untreated buffer strip around each plot. Treatments were blocked according to prespray popula­ tion levels. Insecticides were applied at a rate of 25 gpa using a C0 -propelled 80-inch boom sprayer with 4, flat spray, 80002VS TeeJet nozzles operat­ ing at 30 psi. At treatment, larvae were second to fifth instar and plants were ca. 15% tight cluster, 80% loose cluster, and 5% bloom. On sample dates in­ dicated in table, 10 sweeps with a standard 12-inch sweep-net were taken systematically through the center area of each plot avoiding plot boundaries. The larvae were counted and then distributed back into the same plot. High winds on 26 May made sweep-net sampling difficult and may have confounded the results for that date. Imidan, Asana (both rates), and Mavrik were most effective in suppressing spanworm populations compared with the untreated check. Cryolite and Marlate were not as effective but were better than the check. Low larval counts on 6 Jun were probably due to mature larvae moving into the litter to pu­ pate. No phytotoxicity was apparent in the plots. Oz . No. blueberry spanworm larvae/10 sweeps Treatment acre 23 May* 26 May* 28 May 31 May 3 Jun Asana .66 XL 4.8 13.7a 3.7a O.Od 0.0c 0.0b Asana .66 XL 9.6 14.7a 4.0a 0.3cd 0.0c 0.3b Mavrik 22% AF 3 13.0a 1.3a 2.7abc 0.0c 2.0ab Marlate 50 W P 64 14.0a 4.0a 4.7ab 2.0ab 0.7b Imidan 70 W P 23 12.3a 3.3a 1.3bcd l.Obc 0.0b Cryolite 96% WDG 128 11.3a 3.0a 3.0abc 3.0ab 0.3b Cryolite 96% WDG 192 11.7a 2.0a 3.7abc 2.0ab 0.7b Untreated Check — 14.3a 2.7a 8.3a 5.7a 3.0a Seasonal 6 Jun density' Asana .66 XL 4.8 0.0c 0.0c Asana .66 XL 9.6 0.0c 0.2c Mavrik 22% A F 3 0.0c l.Obc Marlate 50 WP 64 0.7bc 1.6b Imidan 70 W P 23 0.7abc 0.6bc Cryolite 96 % WD G 128 0.0c 1.4b Cryolite 96% WDG 192 l.Oab 1.5b Untreated Check — 1.7a 4.1 a "Means on each date followed by the same letters are not significantly different (P<0.05; DMRT). Data were transformed by log, (X + 1) for analysis. ^Prespray count. ^Seasonal densities are trapezoidal integrals of densities over the season divided by the duration (in number of days) of the experiment. BLUEBERRY: Vaccinium angustifolium Aiton 'lowbush' J. A. Collins, (3C) Blueberry flea beetle; Altica sylvia Malloch F. A. Drummond Dept. of Applied Ecology and Environmental Sciences, University of Maine, Orono, ME 04469 (207)581-296 0 FLEA BEETLE CONTROL, 1996: Materials were applied on 6 Jun to 20 by 20 ft plots in a bearing blueberry field at Jonesport, Maine. There were 3 replications of each treatment and a minimum 5-ft untreated buffer strip around each plot. Treatments were blocked according to prespray popula­ tion levels. Insecticides were applied at a rate of 25 gpa using a C0 -propelled 80-inch boom sprayer with 4, flat spray, 8OO02VS TeeJet nozzles operat­ ing at 35 psi. At treatment, plants were ca. 50% loose cluster, 50% bloom. On sample dates indicated in table, 10 sweeps with a standard 12-inch sweep- net were taken systematically through the center area of each plot, avoiding plot boundaries. The larvae were counted and then distributed back into the same plot. No unusual weather conditions were noted during this test. Downloaded from https://academic.oup.com/amt/article-abstract/22/1/50/4639776 by DeepDyve user on 21 July 2020 C: SMALL FRUITS Arthropod Management Tests, Vol. 22 51 Imidan (all rates and both formulations) and Mavrik gave excellent control. There was an increase in the number of flea beetle larvae captured from Mavrik treated plots beginning 11 Jun. This was probably due to the shorter residual effect of Mavrik. Cryolite (both rates) and M-Trak did not signifi­ cantly reduce population levels. No phytotoxicity was apparent in the plots. Oz form./ Seasonal Treatment acre 6 Jun* 7 Jun 8 Jun 11 Jun density Imidan 2.5 EC 24 80.0a 0.0c 0.0b O.Od O.Od Imidan 2.5 EC 48 73.3a 0.0c 0.0b O.Od O.Od Imidan 70 WP 23 83.3a 0.3c 3.3b O.Od 1.4d Cryolite 96 % WDG 128 90.0a 26.7b 80.0a 100.0a 64.7ab Cryolite 96% WDG 192 83.3a 43.3ab 43.3a 86.7a 47.7c Mavrik 22% A F 3 83.3a 0.0c 3.3b 21.7c 7.8d M-Trak 96 83.3a 63.3a 100.0a 100.0a 76.3a Untreated Check 65.0a 43.3ab 76.7a 53.3b 51.0bc "Means on each date followed by the same letters are not significantly different (/ <0.05; DMRT). Data were transformed by log (X + 1) for analysis. 'Prespray count. 'Seasonal densities are trapezoidal integrals of densities over the season divided by the duration (in number of days) of the experiment. BLUEBERRY: Vaccinium angustifolium Aiton 'lowbush' J. A. Collins, (4C) Redstriped fireworm; Aroga trialbamaculella F. A. Drummond Chambers Dept. of Applied Ecology and Environmental Sciences, University of Maine, Orono, M E 04469 (207)581-296 0 FIREWORM CONTROL, 1996: Materials were applied on 19 Aug to 13 by 13 ft plots in a pruned blueberry field at Township 19, Maine. There were 3 replications of each treatment and a minimum 5-ft untreated buffer strip around each plot. Treatments were blocked according to prespray popula­ tion levels. Insecticides were applied at a rate of 25 gpa using a C0 -propelled 80-inch boom sprayer with 4, flat spray, 80002VS TeeJet nozzles operat­ ing at 35 psi. At treatment, larvae were early (green) instar and plants were at late tip die-back, early fruit bud set stage. On 16 Aug, all blueberry stems 2 2 with webbed-together leaves were counted in each of 4 ft frames per plot. On all other dates, any stems with webbed-together leaves in the same 4 ft frames were cut and examined for: 1) presence of live fireworm larvae, or 2) dead or missing larvae. Live larvae were distributed back into the same frame area. No unusual weather conditions were noted during this test. Imidan, Croylite, and Asana seemed to be effective in controlling infestation. Javelin, Agree, and Azatin were ineffective. No apparent phytoxoc- ity was noted in any plot. Oz Seasonal form./ acre 26 Aug 30 Aug 15 Sep density' Treatment 16 Aug Imidan 70 WP 23 oz 0.2c 0.2bcd 0.0b 0.10b 2.2a Cryolite 96 % WDG 192 oz 2.2a 0.4c O.Ocd 0.09b 0.0b Mavrik 22% AF 3 oz 2.2a 1.8b 0.8abc 0.8a 0.58a Asana .66 XL 2.2a 9.6 oz 0.4c O.Od 0.0b 0.05b 32 oz Javelin WG 2.2a 3.1a 1.8a 0.7a 1.01a Agree 50 WP 2.2a 16 oz 2.2ab 1.3ab 0.4ab 0.73a l.Oab Azatin 4.5 WP/WDG 21 oz 2.2a 2. la b 0.3ab 0.59a +Triton S/S 12 oz Untreated Check 2.2a 1.7b 1.6a 0.8a 0.81a "Means on each date followed by the same letters are not significantly different (P<0.05; DMRT). Data are transformed by log (X + 1) for analysis. 'Prespray count. 'Seasonal densities are trapezoidal integrals of densities over the season divided by the duration (in number of days) of the experiment.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 1997

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