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Effect of Selective Foliar Insecticides on Amblyseius swirskii (Acari: Phytoseiidae), 2014*

Effect of Selective Foliar Insecticides on Amblyseius swirskii (Acari: Phytoseiidae), 2014* Arthropod Management Tests, 2015, 1–2 doi: 10.1093/amt/tsv179 (G4) ORNAMENTAL PEPPER: Capsicum annum L. ‘Masquerade’ Effect of Selective Foliar Insecticides on Amblyseius swirskii (Acari: Phytoseiidae), 2014* 1,2 3 1 Vivek Kumar, Cindy L. McKenzie, and Lance S. Osborne Department of Entomology & Nematology, Mid-Florida Research and Education Center, University of Florida-IFAS, 2725, S. Binion Rd., Apopka, FL 32703, Phone: 407-884-2035, Fax: 407-410-6963 (vivekiari@ufl.edu; lsosborn@ufl.edu), 2 3 Corresponding author, e-mail: vivekiari@ufl.edu, and Subtropical Insects and Horticulture Research, USDA, ARS, USHRL, 2001 South Rock Road, Fort Pierce, FL 34945, Phone: 772-462-5912, Fax: 772-462-5986 (cindy.mckenzie@ars.usda.gov) Subject Editor: Carlos Bogran Pepper | Capsicum annuum swirskii mite | Amblyseius swirskii cis-3-(2,5-dimethylphenyl)-8-methoxy-2-oxo-1-azaspiro(4.5)dec-3-en-4-yl-ethyl carbonate; 2-[3-[2,6-dichloro-4-[(3,3- dichloro-2-pro- penyl)oxy]phenoxy]propoxy]-5-(trifluoromethyl); (2R,3aS,5aR,5bS,9S,13S,14R,16aS,16bR)-2-(6-deoxy-2,3,4- tri-O-methyl-a-L-mannopyranosyloxy)-13-(4-dimethylamino-2,3,4,6-tetradeoxy-b-D-erythropyranosyloxy)-9-ethyl-2,3,3a,5a, 5b,6,7,9,10,11,12,13,14,15,16a,16b-hexadecahydro-14-methyl-1H-as-indaceno[3,2-d]oxacyclododecine-7,15-dione; (2S,3aR, 5aS,5bS,9S,13S,14R,16aS,16bS)-2-(6-deoxy-2,3,4-tri-O-methyl-a-L-mannopyranosyloxy)-13-(4-dimethylamino-2,3,4,6-tetra- deoxy-b-D-erythropyranosyloxy)-9-ethyl-2,3,3a,5a,5b,6,7,9,10,11,12,13,14,15,16a,16b-hexadecahydro-4,14-dimethyl-1H-as- 0 0 0 indaceno[3,2-d]oxacyclododecine-7,15-dione; (10E,14E,16E)-(1R,4S,5 S,6S,6 R,8R,12S,13S,20R,21R,24S)-6 -[(S)-sec-butyl]- 0 4,8 20,24 21,24-dihydroxy-5 ,11,13,22-tetramethyl-2-oxo-(3,7,19-trioxatetracyclo[15.6.1.1 .0 ]pentacosa-10,14,16,22-tetraene)-6- 0 0 0 0 spiro-2 -(5 ,6 -dihydro-2 H-pyran)-12-yl 2,6-dideoxy-4-O-(2,6-dideoxy-3-O-methyl-a-L-arabino-hexopyranosyl)-3-O-methyl- 0 0 0 a-L-arabino-hexopyranoside and  20% (10E,14E,16E)-(1R,4S,5 S,6 ,6R,8R,12S,13S,20R,21R,24S)-21,24-dihydroxy-6 -iso- 0 4,8 20,24 0 propyl-5 ,11,13,22-tetramethyl-2-oxo-(3,7,19-trioxatetracyclo[15.6.1.1 .0 ]pentacosa-10,14,16,22-tetraene)-6-spiro-2 - 0 0 0 (5 ,6 -dihydro-2 H-pyran)-12-yl 2,6-dideoxy-4-O-(2,6-dideoxy-3-O-methyl-a-L-arabino-hexopyranosyl)-3-O-methyl-a-L- arabino-hexopyranoside Amblyseius swirskii is a generalist predator, widely known for its plants were spaced at 1.5  1.5 ft. The trial was setup in a RCB de- biocontrol potential against multiple pests (mites, thrips, and white- sign with five replicates. Treatment effects were evaluated by care- flies) of nursery and greenhouse crops. The objective of this study fully inspecting five top leaves of each pepper plant using a 30 was to evaluate susceptibility of A. swirskii to conventional insecti- hand held lens. Count data were subjected to square root transfor- cides known to be effective against various greenhouse pests. The mation prior to conducting ANOVA and mean separation proce- trial was conducted on an ornamental pepper cultivar dures. The data presented are the untransformed means. Means “Masquerade” at U.S. Horticultural Research Laboratory, Florida separation was performed using the Least Significant Difference to identify A. swirskii-compatible pesticides. Pepper plants were (LSD) test at the P < 0.05 level. grown from seed in Fafard Pro-Mix (Canadian Formula; Conrad A. swirskii populations varied greatly, however significant re- Fafard, Inc., Agawam, MA 01001-2907) medium in seedling trays duction in mite numbers were observed in all the pesticide treat- and transplanted in 10.1 cm-diameter plastic pots when seedlings ments compared to the untreated check. Overall Spintor, Epimek were 5-wk old. Plants were watered as needed (approximately two and Movento were found to be most lethal on the three life stages times a wk) and fertilized weekly with 50 ml/pot of Peters (eggs, nymphs, adults) of mites. No significant difference in number Professional 20-10-20 (325 ppm) (Scotts Co., Marysville, OH). The of mite eggs was observed 24-h post application of treatments greenhouse was maintained at 26 6 3 C and 75–80% RH. Once (Table 1). However, significant reduction in number of mite eggs host plants reached flowering stage, 10 A. swirskii adults were re- was observed (compared with the untreated check) in Spintor leased on the top leaves of each plant. Two wks after predatory mite (76–97%), Epimek (78–91%), and Movento (69–83%) on DAT 5, release, insecticide applications were made using a small hand held 10, and 15. Similar results were obtained while evaluating different sprayer delivering 65.5 ml/ m at 211 kPa (30.6 psi); treated potted treatments for A. swirskii nymphs and adults, where Spintor, * This research was supported by the Floriculture and Nursery Research Initiative. V C The Author 2015. Published by Oxford University Press on behalf of the Entomological Society of America. 1 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com 2 Arthropod Management Tests, 2015, Vol. 40, No. 1 Epimek, and Movento provided significant reduction in the number treatments. No significant difference in the number of any of the life of compared with the untreated check on all sampling dates, except stages was observed in Overture treated plants compared with the DAT 1 (Tables 2 and 3). Overture was found to be most benign on untreated control on DAT 1 and 15. No phyto-toxicity symptoms three life stages of A. swirskii among all of the insecticide were observed following any of the insecticide treatments. Table 1 Mean no. of eggs/five leaves Treatment/formulation Rate amt product/acre DAT 0 (pre-spray) DAT 1 DAT 5 DAT 10 DAT 15 Untreated check – 8.60 10.20 (0) 16.80a (0) 33.0a (0) 40.0a (0) Movento 5 oz 13.20 6.40 (59.1) 5.0b (80.6) 15.60b (69.2) 10.40bc (83) Overture 35 WP 8 oz 11.80 6.80 (51.4) 7.0b (69.6) 10.40b (77) 22.40ab (59.1) Spintor 6 oz 8.80 5.40 (48.3) 4.0b (76.8) 1.0c (97) 4.0c (90.2) Epimek 0.15 EC 15 oz 10.20 9.20 (23.9) 4.20b (78.9) 3.40c (91.3) 6.60c (86) F value 0.85 1.01 4.49 18.65 6.99 Pr > F 0.5149 0.4329 0.0127 <.0001 0.0019 Means in a column followed by the same letter are not significantly different (P > 0.05, LSD test) Henderson-Tilton’s corrected percent mortality is presented in parentheses after each mean. Table 2 Mean no. of nymphs/five leaves Treatment/formulation Rate amt product/acre DAT 0 (pre-spray) DAT 1 DAT 5 DAT 10 DAT 15 Untreated check – 1.60b 2.40a (0) 6.40a (0) 6.40a (0) 15.0a (0) Movento 5 oz 1.80b 0.60b (77.8) 0.80b (88.9) 2.0b (72.2) 1.40b (91.7) Overture 35 WP 8 oz 5.40a 1.80ab (77.8) 1.60b (92.6) 1.40b (93.5) 7.20a (85.8) Spintor 6 oz 2.0b 0.60b (80) 0.40b (95) 0.0c (100) 1.0b (94.6) Epimek 0.15 EC 15 oz 2.80b 0.80ab (80.9) 0.80b (92.8) 0.60bc (94.6) 0.80b (96.9) F value 6.01 2.02 4.50 12.03 5.66 Pr > F 0.0038 0.0139 0.0126 0.0001 0.0049 Means in a column followed by the same letter are not significantly different (P > 0.05, LSD test) Henderson-Tilton’s corrected percent mortality is presented in parentheses after each mean. Table 3 Mean no. of adults/five leaves Treatment/formulation Rate amt product/acre DAT 0 (pre-spray) DAT 1 DAT 5 DAT 10 DAT 15 Untreated check – 3.80 2.80a (0) 4.80a (0) 5.0a (0) 9.80a (0) Movento 5 oz 3.40 1.20ab (52.1) 1.60b (62.7) 1.80bc (59.8) 1.40b (89.6) Overture 35 WP 8 oz 3.20 1.60ab (32.1) 0.21c (94.8) 2.0b (52.5) 7.60a (43) Spintor 6 oz 3.40 0.60b (76) 0.0c (100) 0.40c (91) 0.20b (92.5) Epimek 0.15 EC 15 oz 3.60 0.60b (77.3) 0.0c (100) 0.60c (87.3) 0.80b (94.3) F value 0.08 2.79 15.92 7.27 14.39 Pr> F 0.9861 0.0622 <0.0001 0.0015 <0.0001 Means in a column followed by the same letter are not significantly different (P > 0.05, LSD test) Henderson-Tilton’s corrected percent mortality is presented in parentheses after each mean. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Effect of Selective Foliar Insecticides on Amblyseius swirskii (Acari: Phytoseiidae), 2014*

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Oxford University Press
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The Author 2015. Published by Oxford University Press on behalf of the Entomological Society of America.
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2155-9856
DOI
10.1093/amt/tsv179
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Abstract

Arthropod Management Tests, 2015, 1–2 doi: 10.1093/amt/tsv179 (G4) ORNAMENTAL PEPPER: Capsicum annum L. ‘Masquerade’ Effect of Selective Foliar Insecticides on Amblyseius swirskii (Acari: Phytoseiidae), 2014* 1,2 3 1 Vivek Kumar, Cindy L. McKenzie, and Lance S. Osborne Department of Entomology & Nematology, Mid-Florida Research and Education Center, University of Florida-IFAS, 2725, S. Binion Rd., Apopka, FL 32703, Phone: 407-884-2035, Fax: 407-410-6963 (vivekiari@ufl.edu; lsosborn@ufl.edu), 2 3 Corresponding author, e-mail: vivekiari@ufl.edu, and Subtropical Insects and Horticulture Research, USDA, ARS, USHRL, 2001 South Rock Road, Fort Pierce, FL 34945, Phone: 772-462-5912, Fax: 772-462-5986 (cindy.mckenzie@ars.usda.gov) Subject Editor: Carlos Bogran Pepper | Capsicum annuum swirskii mite | Amblyseius swirskii cis-3-(2,5-dimethylphenyl)-8-methoxy-2-oxo-1-azaspiro(4.5)dec-3-en-4-yl-ethyl carbonate; 2-[3-[2,6-dichloro-4-[(3,3- dichloro-2-pro- penyl)oxy]phenoxy]propoxy]-5-(trifluoromethyl); (2R,3aS,5aR,5bS,9S,13S,14R,16aS,16bR)-2-(6-deoxy-2,3,4- tri-O-methyl-a-L-mannopyranosyloxy)-13-(4-dimethylamino-2,3,4,6-tetradeoxy-b-D-erythropyranosyloxy)-9-ethyl-2,3,3a,5a, 5b,6,7,9,10,11,12,13,14,15,16a,16b-hexadecahydro-14-methyl-1H-as-indaceno[3,2-d]oxacyclododecine-7,15-dione; (2S,3aR, 5aS,5bS,9S,13S,14R,16aS,16bS)-2-(6-deoxy-2,3,4-tri-O-methyl-a-L-mannopyranosyloxy)-13-(4-dimethylamino-2,3,4,6-tetra- deoxy-b-D-erythropyranosyloxy)-9-ethyl-2,3,3a,5a,5b,6,7,9,10,11,12,13,14,15,16a,16b-hexadecahydro-4,14-dimethyl-1H-as- 0 0 0 indaceno[3,2-d]oxacyclododecine-7,15-dione; (10E,14E,16E)-(1R,4S,5 S,6S,6 R,8R,12S,13S,20R,21R,24S)-6 -[(S)-sec-butyl]- 0 4,8 20,24 21,24-dihydroxy-5 ,11,13,22-tetramethyl-2-oxo-(3,7,19-trioxatetracyclo[15.6.1.1 .0 ]pentacosa-10,14,16,22-tetraene)-6- 0 0 0 0 spiro-2 -(5 ,6 -dihydro-2 H-pyran)-12-yl 2,6-dideoxy-4-O-(2,6-dideoxy-3-O-methyl-a-L-arabino-hexopyranosyl)-3-O-methyl- 0 0 0 a-L-arabino-hexopyranoside and  20% (10E,14E,16E)-(1R,4S,5 S,6 ,6R,8R,12S,13S,20R,21R,24S)-21,24-dihydroxy-6 -iso- 0 4,8 20,24 0 propyl-5 ,11,13,22-tetramethyl-2-oxo-(3,7,19-trioxatetracyclo[15.6.1.1 .0 ]pentacosa-10,14,16,22-tetraene)-6-spiro-2 - 0 0 0 (5 ,6 -dihydro-2 H-pyran)-12-yl 2,6-dideoxy-4-O-(2,6-dideoxy-3-O-methyl-a-L-arabino-hexopyranosyl)-3-O-methyl-a-L- arabino-hexopyranoside Amblyseius swirskii is a generalist predator, widely known for its plants were spaced at 1.5  1.5 ft. The trial was setup in a RCB de- biocontrol potential against multiple pests (mites, thrips, and white- sign with five replicates. Treatment effects were evaluated by care- flies) of nursery and greenhouse crops. The objective of this study fully inspecting five top leaves of each pepper plant using a 30 was to evaluate susceptibility of A. swirskii to conventional insecti- hand held lens. Count data were subjected to square root transfor- cides known to be effective against various greenhouse pests. The mation prior to conducting ANOVA and mean separation proce- trial was conducted on an ornamental pepper cultivar dures. The data presented are the untransformed means. Means “Masquerade” at U.S. Horticultural Research Laboratory, Florida separation was performed using the Least Significant Difference to identify A. swirskii-compatible pesticides. Pepper plants were (LSD) test at the P < 0.05 level. grown from seed in Fafard Pro-Mix (Canadian Formula; Conrad A. swirskii populations varied greatly, however significant re- Fafard, Inc., Agawam, MA 01001-2907) medium in seedling trays duction in mite numbers were observed in all the pesticide treat- and transplanted in 10.1 cm-diameter plastic pots when seedlings ments compared to the untreated check. Overall Spintor, Epimek were 5-wk old. Plants were watered as needed (approximately two and Movento were found to be most lethal on the three life stages times a wk) and fertilized weekly with 50 ml/pot of Peters (eggs, nymphs, adults) of mites. No significant difference in number Professional 20-10-20 (325 ppm) (Scotts Co., Marysville, OH). The of mite eggs was observed 24-h post application of treatments greenhouse was maintained at 26 6 3 C and 75–80% RH. Once (Table 1). However, significant reduction in number of mite eggs host plants reached flowering stage, 10 A. swirskii adults were re- was observed (compared with the untreated check) in Spintor leased on the top leaves of each plant. Two wks after predatory mite (76–97%), Epimek (78–91%), and Movento (69–83%) on DAT 5, release, insecticide applications were made using a small hand held 10, and 15. Similar results were obtained while evaluating different sprayer delivering 65.5 ml/ m at 211 kPa (30.6 psi); treated potted treatments for A. swirskii nymphs and adults, where Spintor, * This research was supported by the Floriculture and Nursery Research Initiative. V C The Author 2015. Published by Oxford University Press on behalf of the Entomological Society of America. 1 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com 2 Arthropod Management Tests, 2015, Vol. 40, No. 1 Epimek, and Movento provided significant reduction in the number treatments. No significant difference in the number of any of the life of compared with the untreated check on all sampling dates, except stages was observed in Overture treated plants compared with the DAT 1 (Tables 2 and 3). Overture was found to be most benign on untreated control on DAT 1 and 15. No phyto-toxicity symptoms three life stages of A. swirskii among all of the insecticide were observed following any of the insecticide treatments. Table 1 Mean no. of eggs/five leaves Treatment/formulation Rate amt product/acre DAT 0 (pre-spray) DAT 1 DAT 5 DAT 10 DAT 15 Untreated check – 8.60 10.20 (0) 16.80a (0) 33.0a (0) 40.0a (0) Movento 5 oz 13.20 6.40 (59.1) 5.0b (80.6) 15.60b (69.2) 10.40bc (83) Overture 35 WP 8 oz 11.80 6.80 (51.4) 7.0b (69.6) 10.40b (77) 22.40ab (59.1) Spintor 6 oz 8.80 5.40 (48.3) 4.0b (76.8) 1.0c (97) 4.0c (90.2) Epimek 0.15 EC 15 oz 10.20 9.20 (23.9) 4.20b (78.9) 3.40c (91.3) 6.60c (86) F value 0.85 1.01 4.49 18.65 6.99 Pr > F 0.5149 0.4329 0.0127 <.0001 0.0019 Means in a column followed by the same letter are not significantly different (P > 0.05, LSD test) Henderson-Tilton’s corrected percent mortality is presented in parentheses after each mean. Table 2 Mean no. of nymphs/five leaves Treatment/formulation Rate amt product/acre DAT 0 (pre-spray) DAT 1 DAT 5 DAT 10 DAT 15 Untreated check – 1.60b 2.40a (0) 6.40a (0) 6.40a (0) 15.0a (0) Movento 5 oz 1.80b 0.60b (77.8) 0.80b (88.9) 2.0b (72.2) 1.40b (91.7) Overture 35 WP 8 oz 5.40a 1.80ab (77.8) 1.60b (92.6) 1.40b (93.5) 7.20a (85.8) Spintor 6 oz 2.0b 0.60b (80) 0.40b (95) 0.0c (100) 1.0b (94.6) Epimek 0.15 EC 15 oz 2.80b 0.80ab (80.9) 0.80b (92.8) 0.60bc (94.6) 0.80b (96.9) F value 6.01 2.02 4.50 12.03 5.66 Pr > F 0.0038 0.0139 0.0126 0.0001 0.0049 Means in a column followed by the same letter are not significantly different (P > 0.05, LSD test) Henderson-Tilton’s corrected percent mortality is presented in parentheses after each mean. Table 3 Mean no. of adults/five leaves Treatment/formulation Rate amt product/acre DAT 0 (pre-spray) DAT 1 DAT 5 DAT 10 DAT 15 Untreated check – 3.80 2.80a (0) 4.80a (0) 5.0a (0) 9.80a (0) Movento 5 oz 3.40 1.20ab (52.1) 1.60b (62.7) 1.80bc (59.8) 1.40b (89.6) Overture 35 WP 8 oz 3.20 1.60ab (32.1) 0.21c (94.8) 2.0b (52.5) 7.60a (43) Spintor 6 oz 3.40 0.60b (76) 0.0c (100) 0.40c (91) 0.20b (92.5) Epimek 0.15 EC 15 oz 3.60 0.60b (77.3) 0.0c (100) 0.60c (87.3) 0.80b (94.3) F value 0.08 2.79 15.92 7.27 14.39 Pr> F 0.9861 0.0622 <0.0001 0.0015 <0.0001 Means in a column followed by the same letter are not significantly different (P > 0.05, LSD test) Henderson-Tilton’s corrected percent mortality is presented in parentheses after each mean.

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Published: Dec 31, 2015

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