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Apple, Obliquebanded Leafroller Control with Spinosad, Bacillus Thuringiensis, Abamectin and Chlorpyrifos in Spring, 1995

Apple, Obliquebanded Leafroller Control with Spinosad, Bacillus Thuringiensis, Abamectin and... Downloaded from https://academic.oup.com/amt/article-abstract/21/1/8/4639814 by DeepDyve user on 02 August 2020 8 Arthropod Management Tests, Vol. 21 A: POME FRUITS Percentage Mattawa test OBLR died as: Dead OBLR Lived Treatment Rate/100 n Larva Pupa deformed to adult Neemix 4.5% 104 ml 37 29.7a-c 45.9c 29.7b 24.3ab Neemix 4.5% 207 ml 38 47.4c 34.2bc 28.9b 18.4a Neemix 4.5% 104 ml 36 38.9bc 25.0ab 5.6a 36.1a-c +Dipel 2X 21 g Dipel 2X 21 g 45 22.2ab 33.3bc 22.2b 44.4bc Dipel 2X 113 g 20 10.0a 5.0a 0.0a 85.Od Lorsban 4E 475 ml 3 0.0 33.3 0.0 66.7 Untreated 60 21.7ab 23.3ab 3.3a 55.0c Means in the same column followed by the same letter not significantly different (P = 0.05, Fisher's Protected LSD). APPLE: Malus domestica Borkhauser 'Delicious' and 'Fuji' J. F. Brunner, M. D. Doerr and L. O. Smith (9A) Obliquebanded leafroller (OBLR); Choristoneura rosaceana Washington State University (Harris) Tree Fruit Research and Extension Center 1100 N. Western Avenue Wenatchee, WA 98801 509-663-8181 APPLE, OBLIQUEBANDED LEAFROLLER CONTROL WITH SPINOSAD, BACILLUS THUR1NGIENSIS, ABAMECTIN AND CHLORPYRIFOS IN SPRING, 1995: Spinosad, 80% (formulation NAF-127, DowElanco); Bacillus thuringiensis (Bt) (Dipel 2X, Abbott Laboratories), abamectin Agri-Mek 0.15 EC (Merck & Co., Inc.) and chlorpyrifos (Lorsban 4E, DowElanco) were evaluated for their ability to control OBLR larvae of the overwintering generation. The test was conducted in an apple orchard in Mattawa, WA. The trees were 3-yr-old Delicious on dwarfing roots. Treatments were applied to 12-tree plots replicated 5 times in a randomized complete block. All treatments were applied with a handgun sprayer at 300 psi to the point of drip. Application dates were 5 Apr (pink) and 9 May (petal fall). Approximate application timings with regard to plant development stage are shown in the table. The post-treatment evaluation was made on 24 May by a count of the total number of live OBLR larvae on all trees of a treatment replication. Live larvae were collected to observe sublethal effects. Surviving larvae were reared on artificial leafroller diet in 3.25 oz portion cups until death or adult emergence. Any deformities possibly resulting from exposure to an insect growth regulator were recorded. Weather was good, calm winds and moderate temperatures, at the time of applications. The leafroller population was high at the Mattawa orchard. All treatments except the single application of Dipel 2X and AGRI-MEK had significantly lower levels of OBLR larvae compared to the untreated check. There was no rate response noted with Spinosad, and it did not appear that there was any advantage to two applications. All Spinosad treatments performed as well as the commercial standard of Lorsban. Two applications of Dipel 2X gave significantly better control than 1 application. There was no significant difference between the early and late applications of Agri-Mek. Although the sample sizes of the sublethal test were highly variable, it seems to indicate that there were no significant differences between the treatments. Percent Avg no. of live OBLR larvae OBLR died as: Dead per 12 trees OBLR Lived Treatment Rate/100 Timing Mattawa n Larva Pupa deformed to adult Spinosad 80% 23.7 g Pink 1.2a 10 0.0a 60.0a 0.0a 40.0a Spinosad 80% 23.7 g Pink, petal fall 1.0a 1 0.0a 0.0a 0.0a 100.0a Spinosad 80% 47.4 g Pink 0.8a 6 16.7a 33.3a 0.0a 50.0a Spinosad 80% 47.4 g Pink, petal fall 0.0a 0 Dipel 2X 113 g Pink 12.8c 66 16.7a 30.3a 4.5a 53.0a Dipel 2X U3 g Pink, petal fall 6.0b 19 15.8a 26.3a 5.3a 57.9a Agri-Mek 0.15 EC 75 ml Pink 13.8c 58 31.0a 41.4a 1.7a 27.6a + oil 0.25% 950 ml Petal fall 18.4c 81 22.2a 30.9a 6.2a 46.9a Agri-Mek 0.15 EC 75 ml +oil 0.25% 950 ml Lorsban 4 E 474 ml Pink 1.6a 8 12.5a 50.0a 12.5a 37.5a Untreated None 17.8c 77 18.2a 41.6a 2.6a 40.3a Means in the same column followed by the same letter not significantly different (P = 0.05, Fisher's Protected LSD). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Apple, Obliquebanded Leafroller Control with Spinosad, Bacillus Thuringiensis, Abamectin and Chlorpyrifos in Spring, 1995

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Publisher
Oxford University Press
Copyright
© Entomological Society of America.
eISSN
2155-9856
DOI
10.1093/amt/21.1.8
Publisher site
See Article on Publisher Site

Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/21/1/8/4639814 by DeepDyve user on 02 August 2020 8 Arthropod Management Tests, Vol. 21 A: POME FRUITS Percentage Mattawa test OBLR died as: Dead OBLR Lived Treatment Rate/100 n Larva Pupa deformed to adult Neemix 4.5% 104 ml 37 29.7a-c 45.9c 29.7b 24.3ab Neemix 4.5% 207 ml 38 47.4c 34.2bc 28.9b 18.4a Neemix 4.5% 104 ml 36 38.9bc 25.0ab 5.6a 36.1a-c +Dipel 2X 21 g Dipel 2X 21 g 45 22.2ab 33.3bc 22.2b 44.4bc Dipel 2X 113 g 20 10.0a 5.0a 0.0a 85.Od Lorsban 4E 475 ml 3 0.0 33.3 0.0 66.7 Untreated 60 21.7ab 23.3ab 3.3a 55.0c Means in the same column followed by the same letter not significantly different (P = 0.05, Fisher's Protected LSD). APPLE: Malus domestica Borkhauser 'Delicious' and 'Fuji' J. F. Brunner, M. D. Doerr and L. O. Smith (9A) Obliquebanded leafroller (OBLR); Choristoneura rosaceana Washington State University (Harris) Tree Fruit Research and Extension Center 1100 N. Western Avenue Wenatchee, WA 98801 509-663-8181 APPLE, OBLIQUEBANDED LEAFROLLER CONTROL WITH SPINOSAD, BACILLUS THUR1NGIENSIS, ABAMECTIN AND CHLORPYRIFOS IN SPRING, 1995: Spinosad, 80% (formulation NAF-127, DowElanco); Bacillus thuringiensis (Bt) (Dipel 2X, Abbott Laboratories), abamectin Agri-Mek 0.15 EC (Merck & Co., Inc.) and chlorpyrifos (Lorsban 4E, DowElanco) were evaluated for their ability to control OBLR larvae of the overwintering generation. The test was conducted in an apple orchard in Mattawa, WA. The trees were 3-yr-old Delicious on dwarfing roots. Treatments were applied to 12-tree plots replicated 5 times in a randomized complete block. All treatments were applied with a handgun sprayer at 300 psi to the point of drip. Application dates were 5 Apr (pink) and 9 May (petal fall). Approximate application timings with regard to plant development stage are shown in the table. The post-treatment evaluation was made on 24 May by a count of the total number of live OBLR larvae on all trees of a treatment replication. Live larvae were collected to observe sublethal effects. Surviving larvae were reared on artificial leafroller diet in 3.25 oz portion cups until death or adult emergence. Any deformities possibly resulting from exposure to an insect growth regulator were recorded. Weather was good, calm winds and moderate temperatures, at the time of applications. The leafroller population was high at the Mattawa orchard. All treatments except the single application of Dipel 2X and AGRI-MEK had significantly lower levels of OBLR larvae compared to the untreated check. There was no rate response noted with Spinosad, and it did not appear that there was any advantage to two applications. All Spinosad treatments performed as well as the commercial standard of Lorsban. Two applications of Dipel 2X gave significantly better control than 1 application. There was no significant difference between the early and late applications of Agri-Mek. Although the sample sizes of the sublethal test were highly variable, it seems to indicate that there were no significant differences between the treatments. Percent Avg no. of live OBLR larvae OBLR died as: Dead per 12 trees OBLR Lived Treatment Rate/100 Timing Mattawa n Larva Pupa deformed to adult Spinosad 80% 23.7 g Pink 1.2a 10 0.0a 60.0a 0.0a 40.0a Spinosad 80% 23.7 g Pink, petal fall 1.0a 1 0.0a 0.0a 0.0a 100.0a Spinosad 80% 47.4 g Pink 0.8a 6 16.7a 33.3a 0.0a 50.0a Spinosad 80% 47.4 g Pink, petal fall 0.0a 0 Dipel 2X 113 g Pink 12.8c 66 16.7a 30.3a 4.5a 53.0a Dipel 2X U3 g Pink, petal fall 6.0b 19 15.8a 26.3a 5.3a 57.9a Agri-Mek 0.15 EC 75 ml Pink 13.8c 58 31.0a 41.4a 1.7a 27.6a + oil 0.25% 950 ml Petal fall 18.4c 81 22.2a 30.9a 6.2a 46.9a Agri-Mek 0.15 EC 75 ml +oil 0.25% 950 ml Lorsban 4 E 474 ml Pink 1.6a 8 12.5a 50.0a 12.5a 37.5a Untreated None 17.8c 77 18.2a 41.6a 2.6a 40.3a Means in the same column followed by the same letter not significantly different (P = 0.05, Fisher's Protected LSD).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 1996

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