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PRE-HARVEST CONTROL OF SPOTTED WING DROSOPHILA IN CHERRY, 2011

PRE-HARVEST CONTROL OF SPOTTED WING DROSOPHILA IN CHERRY, 2011 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.B2 (B2) CHERRY (SWEET): Prunus avium L., ‘Bing’ R. A. Van Steenwyk Department of E.S.P.M. 130 Mulford Hall-3114 University of California Berkeley, CA 94720-3114 Telephone: (510) 643-5159 Fax: (510) 643-5438 Email: bobvanst@berkeley.edu L. M. Novotny Email: laurnov@berkeley.edu Telephone: (510) 643-5159 C. Wise Email: cwise@berkeley.edu Telephone: (510) 643-5159 Spotted wing Drosophila (SWD): Drosophila suzukii (Matsumura) This trial evaluated a wide array of insecticides for control of SWD on cherry for inclusion in pest management programs. The trial was conducted in a commercial ‘Bing’ cherry orchard near Farmington, CA. The orchard was planted on a 24 ft by 24 ft (row by tree) spacing. Ten treatments were replicated six times in a RCB design. Each replicate was an individual tree. There was at least one untreated buffer tree between each replicate. Treatments were applied with a hand-held orchard sprayer operating at 250 psi with a finished spray vol of 300 gpa. Treatments were applied on 27 May. A 100 fruit per-treatment evaluation was conducted on 24 May. The 100 fruit were crushed and submerged in a brown sugar solution (7 lbs brown sugar per 5 gal of water) and larvae were counted on the solution surface. Recovered larvae were transferred to diet and reared to adulthood for species identification. The larvae were held at 23.5˚C in a constant temperature cabinet with 16:8 (L:D). The number of SWD larvae per 100 fruit was again determined on 2 and 9 Jun. Data was analyzed using ANOVA and means were separated using Fisher’s protected LSD (P > 0.05). There was no significant difference among the treatments prior to application on 27 May, nor was there a significant difference at one week after treatment. However, at two weeks after treatment (approximately 1 SWD life-cycle) Movento 2SC, HGW86 10SE, Perm- Up 3.2EC, Baythroid XL and Leverage 360 had significantly reduced larval infestation compared to the untreated check. There was no significant difference among Assail 70WP, Admire Pro, Belay 2.13SC, Bexar 1.25SC and the untreated check. SWD comprised over 97% of all drosophila larvae reared to adults. No phytotoxicity was observed with any of the experimental treatments. This research was supported by industry gift(s) of pesticides and/or research funding. Table 1. No. of larvae/100 fruit Treatment/ Rate formulation form/acre 24 May 2 Jun 9 Jun Assail 70WP 3.4 oz 7.8a 7.5a 9.3abc Admire Pro 2.8 fl oz 5.0a 12.3a 7.0abc Belay 2.13SC 6.0 fl oz 6.5a 6.3a 8.0abc Movento 2SC 9.0 fl oz 3.5a 8.3a 5.5c HGW86 10SE 20.5 fl oz 7.3a 9.0a 6.5bc Bexar 1.25SC 17.7 fl oz 6.3a 20.8a 14.8ab Perm-Up 3.2 EC 8.0 fl oz 4.3a 9.0a 3.5c Baythroid XL 2.8 fl oz 4.5a 11.3a 2.0c Leverage 360 2.8 fl oz 3.8a 11.0a 5.0c Untreated check --- 10.0a 15.5a 15.3a Means followed by the same letter within a column are not significantly different (Fisher’s protected LSD, P > 0.05). Treatment applied with Dyne-Amic at 0.25% v/v. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

PRE-HARVEST CONTROL OF SPOTTED WING DROSOPHILA IN CHERRY, 2011

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10.4182/amt.2012.B2
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Abstract

Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.B2 (B2) CHERRY (SWEET): Prunus avium L., ‘Bing’ R. A. Van Steenwyk Department of E.S.P.M. 130 Mulford Hall-3114 University of California Berkeley, CA 94720-3114 Telephone: (510) 643-5159 Fax: (510) 643-5438 Email: bobvanst@berkeley.edu L. M. Novotny Email: laurnov@berkeley.edu Telephone: (510) 643-5159 C. Wise Email: cwise@berkeley.edu Telephone: (510) 643-5159 Spotted wing Drosophila (SWD): Drosophila suzukii (Matsumura) This trial evaluated a wide array of insecticides for control of SWD on cherry for inclusion in pest management programs. The trial was conducted in a commercial ‘Bing’ cherry orchard near Farmington, CA. The orchard was planted on a 24 ft by 24 ft (row by tree) spacing. Ten treatments were replicated six times in a RCB design. Each replicate was an individual tree. There was at least one untreated buffer tree between each replicate. Treatments were applied with a hand-held orchard sprayer operating at 250 psi with a finished spray vol of 300 gpa. Treatments were applied on 27 May. A 100 fruit per-treatment evaluation was conducted on 24 May. The 100 fruit were crushed and submerged in a brown sugar solution (7 lbs brown sugar per 5 gal of water) and larvae were counted on the solution surface. Recovered larvae were transferred to diet and reared to adulthood for species identification. The larvae were held at 23.5˚C in a constant temperature cabinet with 16:8 (L:D). The number of SWD larvae per 100 fruit was again determined on 2 and 9 Jun. Data was analyzed using ANOVA and means were separated using Fisher’s protected LSD (P > 0.05). There was no significant difference among the treatments prior to application on 27 May, nor was there a significant difference at one week after treatment. However, at two weeks after treatment (approximately 1 SWD life-cycle) Movento 2SC, HGW86 10SE, Perm- Up 3.2EC, Baythroid XL and Leverage 360 had significantly reduced larval infestation compared to the untreated check. There was no significant difference among Assail 70WP, Admire Pro, Belay 2.13SC, Bexar 1.25SC and the untreated check. SWD comprised over 97% of all drosophila larvae reared to adults. No phytotoxicity was observed with any of the experimental treatments. This research was supported by industry gift(s) of pesticides and/or research funding. Table 1. No. of larvae/100 fruit Treatment/ Rate formulation form/acre 24 May 2 Jun 9 Jun Assail 70WP 3.4 oz 7.8a 7.5a 9.3abc Admire Pro 2.8 fl oz 5.0a 12.3a 7.0abc Belay 2.13SC 6.0 fl oz 6.5a 6.3a 8.0abc Movento 2SC 9.0 fl oz 3.5a 8.3a 5.5c HGW86 10SE 20.5 fl oz 7.3a 9.0a 6.5bc Bexar 1.25SC 17.7 fl oz 6.3a 20.8a 14.8ab Perm-Up 3.2 EC 8.0 fl oz 4.3a 9.0a 3.5c Baythroid XL 2.8 fl oz 4.5a 11.3a 2.0c Leverage 360 2.8 fl oz 3.8a 11.0a 5.0c Untreated check --- 10.0a 15.5a 15.3a Means followed by the same letter within a column are not significantly different (Fisher’s protected LSD, P > 0.05). Treatment applied with Dyne-Amic at 0.25% v/v.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2012

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