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BLUEBERRY MAGGOT CONTROL, 2012

BLUEBERRY MAGGOT CONTROL, 2012 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.C1 (C1) BLUEBERRY: Vaccinium angustifolium Aiton, ‘lowbush’ J. A. Collins School of Biology and Ecology 5722 Deering Hall University of Maine Orono, ME 04469 Phone: (207) 581-2868 Fax: (207) 581-2969 E-mail: Judith.Collins@umit.maine.edu F. A. Drummond Email: Frank.Drummond@umit.maine.edu Blueberry maggot (BM): Rhagoletis mendax Curran This experiment was conducted on lowbush blueberry to evaluate the effectiveness of Assail 30SG (5.3 oz/acre) and Sivanto 200SL (10.5 and 14.0 oz/acre) against blueberry maggot (BM). Dyne-amic nonionic surfactant (0.25% v/v) was added to the Sivanto treatments. Materials were applied to an unmanaged, fruit-bearing field in Township 18, ME. All rates and materials were applied in 20 gallons of water per acre using a CIMA P55D Atomizer L.V. sprayer mounted on an Agco Allis 6670 tractor. There were three blocks per treatment plus three non-treated checks. Each block measured 80 x 100 ft. There was no buffer between the blocks. Efficacy was evaluated based on the number of BM pupae collected from fruit samples. On 23 Jul we raked four quarts of berries from each block. To collect BM pupae, the berries from each block were combined and distributed in a 1 to 2-inch deep layer in screened boxes suspended over ca. 2 inches of fine sand. Hardware cloth (0.25 inch) was used as a screening material. In mid-Oct, BM pupae were separated from the sand by floating them in water. No symptoms of phytotoxicity were observed on any plot. Analysis of Variance (ANOVA, RCB) and Tukey’s HSD (P < 0.05) were used to compare fruit infestation as measured by number of BM pupae per quart of fruit among the treatments. Data for the number of pupae were transformed by square root prior to analysis to stabilize variances. Assail and the 14.0 oz rate of Sivanto both significantly reduced infestation in comparison with the non-treated check plots (P = 0.0109)(Table 1). This research was supported by industry gift(s) of pesticide and/or research funding. Table 1. Amt. form./ Material acre Pupae/qt Assail 30SG 5.3 oz 4.2b Sivanto 200SL 10.5 oz 23.4ab Sivanto 200SL 14.0 oz 5.0b Non-treated check 45.3a Means followed by the same letter(s) are not significantly different (Tukey’s HSD, P < 0.05). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

BLUEBERRY MAGGOT CONTROL, 2012

Arthropod Management Tests , Volume 38 (1) – Jan 1, 2013

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Oxford University Press
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© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.4182/amt.2013.C1
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Abstract

Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.C1 (C1) BLUEBERRY: Vaccinium angustifolium Aiton, ‘lowbush’ J. A. Collins School of Biology and Ecology 5722 Deering Hall University of Maine Orono, ME 04469 Phone: (207) 581-2868 Fax: (207) 581-2969 E-mail: Judith.Collins@umit.maine.edu F. A. Drummond Email: Frank.Drummond@umit.maine.edu Blueberry maggot (BM): Rhagoletis mendax Curran This experiment was conducted on lowbush blueberry to evaluate the effectiveness of Assail 30SG (5.3 oz/acre) and Sivanto 200SL (10.5 and 14.0 oz/acre) against blueberry maggot (BM). Dyne-amic nonionic surfactant (0.25% v/v) was added to the Sivanto treatments. Materials were applied to an unmanaged, fruit-bearing field in Township 18, ME. All rates and materials were applied in 20 gallons of water per acre using a CIMA P55D Atomizer L.V. sprayer mounted on an Agco Allis 6670 tractor. There were three blocks per treatment plus three non-treated checks. Each block measured 80 x 100 ft. There was no buffer between the blocks. Efficacy was evaluated based on the number of BM pupae collected from fruit samples. On 23 Jul we raked four quarts of berries from each block. To collect BM pupae, the berries from each block were combined and distributed in a 1 to 2-inch deep layer in screened boxes suspended over ca. 2 inches of fine sand. Hardware cloth (0.25 inch) was used as a screening material. In mid-Oct, BM pupae were separated from the sand by floating them in water. No symptoms of phytotoxicity were observed on any plot. Analysis of Variance (ANOVA, RCB) and Tukey’s HSD (P < 0.05) were used to compare fruit infestation as measured by number of BM pupae per quart of fruit among the treatments. Data for the number of pupae were transformed by square root prior to analysis to stabilize variances. Assail and the 14.0 oz rate of Sivanto both significantly reduced infestation in comparison with the non-treated check plots (P = 0.0109)(Table 1). This research was supported by industry gift(s) of pesticide and/or research funding. Table 1. Amt. form./ Material acre Pupae/qt Assail 30SG 5.3 oz 4.2b Sivanto 200SL 10.5 oz 23.4ab Sivanto 200SL 14.0 oz 5.0b Non-treated check 45.3a Means followed by the same letter(s) are not significantly different (Tukey’s HSD, P < 0.05).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2013

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