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Foliar Sprays of Selective and Broad-Spectrum Insectcides to Control Asian Citrus Psyllid in Oranges: Summer, 2015

Foliar Sprays of Selective and Broad-Spectrum Insectcides to Control Asian Citrus Psyllid in... Arthropod Management Tests, 2016, 1–1 doi: 10.1093/amt/tsw009 Section D: Citrus, Nuts, and Other Tree Fruits ORANGE: Citrus sinensis (L.) Osbeck, ‘Hamlin’ Foliar Sprays of Selective and Broad-Spectrum Insectcides to Control Asian Citrus Psyllid in Oranges: Summer, 2015 Philip A. Stansly, Jawwad A. Qureshi, and Barry C. Kostyk University of Florida/IFAS, Southwest Florida Res. and Ed. Center, 2685 State Road 29 North, Immokalee, FL 34142- 9515, Phone: (239) 658-3427, Fax: (239) 658-3469 (pstansly@ufl.edu; jawwadq@ufl.edu; bkostyk@ufl.edu) and Corresponding author, e-mail: pstansly@ufl.edu Subject Editor: David Haviland Orange | Citrus sinensis Asian citrus psyllid | Diaphorina citri Asian citrus psyllid (ACP) is the key pest of citrus in Florida, respon- of adults counted after falling on a white plastic clipboard placed sible for the spread of huanglongbing or citrus greening disease. under a randomly chosen limb struck three times with a short length Effective insecticides with diverse modes of action are needed to of PVC pipe. Data were subjected to ANOVA and means separated control this pest and reduce selection for insecticide resistance. The using LSD (P¼ 0.05) are presented. experimental block at the Southwest Florida Research and Significant effects of all treatments compared to untreated check Education Center consisted of 5-yr-old sweet orange “Hamlin” trees were seen on nymphs through 18 DAT except PFR 97 (effective only bud grafted to “US-802” (Citrus grandis Poncirus trifoliata) at 4 DAT) and Caffeineþ Induce (effective all but 12 DAT) planted at a density of 308 trees/acre. Trees were irrigated with (Table 1). Effective treatments were statistically similar through 12 micro-sprinklers, subjected to conventional cultural practices and DAT. At 18 DAT most reduction was seen with the Cygon 2E treat- pruned to induce new growth for ACP infestation. Nine treatments ment although not different from Danitol 2.4 EC, Malathion 57 EC, and an untreated check, seven trees per plot, were randomly distrib- Apta 15 SCþ Dyne-amic, and Closer 240 SCþ Response. All treat- uted across four replicates in four rows separated by untreated buf- ments provided significant reduction in adults through 18 DAT ex- fer rows using an RCBD. Treatments were applied on 5 Jun 2015 cept Caffeineþ Induce or PFR 97 which were effective through 4 or using a Durand Wayland AF100-32 air blast speed sprayer operat- 7 DAT, respectively (Table 1). At 26 DAT only Danitol 2.4 EC, Apta ing at 1.9 mph and 300 psi equipped with Nos. 3, 4, and 5 each with 15 SCþ Dyne-amic, Closer 240 SCþ Response, and Cygon 2E were a two hole whirl John Bean ceramic nozzles delivering 80 gpa. Ten still providing significant reduction in adults. Although counts of randomly selected shoots per plot were collected and examined both adults and nymphs were twice as high with Closerþ Dyne-amic under a stereomicroscope in the laboratory to count ACP nymphs. compared to Closerþ Response at 18 and 26 days, respectively, dif- Density of ACP adults was assessed on five trees per plot using the ferences were not significant. No phytotoxicity was observed. This stem tap sampling method twice on each tree. Each sample consisted research was supported by industry gifts of pesticide and funds. Table 1 Treatment/formulation Rate amt product/ Mean no. ACP nymphs/flush Mean no. ACP adults/tap sample 100 gpa or % v/v 4 DAT 7 DAT 12 DAT 18 DAT 4 DAT 7 DAT 12 DAT 18 DAT 26 DAT Untreated check None 14.68a 8.83ab 14.43b 46.68a 0.35a 0.40b 0.43a 0.43a 0.85a Danitol 2.4 EC 12 oz 1.03c 0.80c 4.78c 10.00ef 0.00c 0.00d 0.00d 0.05c 0.25bc Apta 15 SCþ Dyne-amic 14 ozþ 0.25% 0.35c 0.25c 0.38c 4.50ef 0.03bc 0.00d 0.13cd 0.13bc 0.10bc Sivanto 200 SLþ Dyne-amic 10.5 ozþ 0.25% 2.75c 0.90c 6.43c 16.55cde 0.13bc 0.05cd 0.18bcd 0.18bc 0.90a Closer 240 SCþ Dyne-amic 5 ozþ 0.25% 2.23c 0.33c 1.93c 23.80bcd 0.03bc 0.13cd 0.13cd 0.20bc 0.63ab Closer 240 SCþ Response 5 ozþ 0.25% 1.35c 0.15c 1.68c 10.45def 0.08bc 0.03cd 0.18bcd 0.10bc 0.30bc Cygon 2E 16 oz 1.83c 0.48c 0.13c 2.70f 0.00c 0.00d 0.05d 0.05c 0.08c Malathion 57 EC 40 oz 1.25c 1.28c 1.50c 11.80def 0.03bc 0.03cd 0.15bcd 0.03c 0.45abc PFR 97 1 lb 10.73b 10.48a 22.50a 33.23ab 0.18b 0.20c 0.35ab 0.45a 0.85a Caffeineþ Induce 0.50%þ 0.50% 3.30c 5.56b 26.35a 29.45bc 0.13bc 0.60a 0.28abc 0.28ab 0.38abc Means in a column followed by the same letter are not significantly different (P> 0.05, LSD). V C The Author 2016. 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 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Foliar Sprays of Selective and Broad-Spectrum Insectcides to Control Asian Citrus Psyllid in Oranges: Summer, 2015

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Oxford University Press
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© The Author 2016. Published by Oxford University Press on behalf of the Entomological Society of America.
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2155-9856
DOI
10.1093/amt/tsw009
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Abstract

Arthropod Management Tests, 2016, 1–1 doi: 10.1093/amt/tsw009 Section D: Citrus, Nuts, and Other Tree Fruits ORANGE: Citrus sinensis (L.) Osbeck, ‘Hamlin’ Foliar Sprays of Selective and Broad-Spectrum Insectcides to Control Asian Citrus Psyllid in Oranges: Summer, 2015 Philip A. Stansly, Jawwad A. Qureshi, and Barry C. Kostyk University of Florida/IFAS, Southwest Florida Res. and Ed. Center, 2685 State Road 29 North, Immokalee, FL 34142- 9515, Phone: (239) 658-3427, Fax: (239) 658-3469 (pstansly@ufl.edu; jawwadq@ufl.edu; bkostyk@ufl.edu) and Corresponding author, e-mail: pstansly@ufl.edu Subject Editor: David Haviland Orange | Citrus sinensis Asian citrus psyllid | Diaphorina citri Asian citrus psyllid (ACP) is the key pest of citrus in Florida, respon- of adults counted after falling on a white plastic clipboard placed sible for the spread of huanglongbing or citrus greening disease. under a randomly chosen limb struck three times with a short length Effective insecticides with diverse modes of action are needed to of PVC pipe. Data were subjected to ANOVA and means separated control this pest and reduce selection for insecticide resistance. The using LSD (P¼ 0.05) are presented. experimental block at the Southwest Florida Research and Significant effects of all treatments compared to untreated check Education Center consisted of 5-yr-old sweet orange “Hamlin” trees were seen on nymphs through 18 DAT except PFR 97 (effective only bud grafted to “US-802” (Citrus grandis Poncirus trifoliata) at 4 DAT) and Caffeineþ Induce (effective all but 12 DAT) planted at a density of 308 trees/acre. Trees were irrigated with (Table 1). Effective treatments were statistically similar through 12 micro-sprinklers, subjected to conventional cultural practices and DAT. At 18 DAT most reduction was seen with the Cygon 2E treat- pruned to induce new growth for ACP infestation. Nine treatments ment although not different from Danitol 2.4 EC, Malathion 57 EC, and an untreated check, seven trees per plot, were randomly distrib- Apta 15 SCþ Dyne-amic, and Closer 240 SCþ Response. All treat- uted across four replicates in four rows separated by untreated buf- ments provided significant reduction in adults through 18 DAT ex- fer rows using an RCBD. Treatments were applied on 5 Jun 2015 cept Caffeineþ Induce or PFR 97 which were effective through 4 or using a Durand Wayland AF100-32 air blast speed sprayer operat- 7 DAT, respectively (Table 1). At 26 DAT only Danitol 2.4 EC, Apta ing at 1.9 mph and 300 psi equipped with Nos. 3, 4, and 5 each with 15 SCþ Dyne-amic, Closer 240 SCþ Response, and Cygon 2E were a two hole whirl John Bean ceramic nozzles delivering 80 gpa. Ten still providing significant reduction in adults. Although counts of randomly selected shoots per plot were collected and examined both adults and nymphs were twice as high with Closerþ Dyne-amic under a stereomicroscope in the laboratory to count ACP nymphs. compared to Closerþ Response at 18 and 26 days, respectively, dif- Density of ACP adults was assessed on five trees per plot using the ferences were not significant. No phytotoxicity was observed. This stem tap sampling method twice on each tree. Each sample consisted research was supported by industry gifts of pesticide and funds. Table 1 Treatment/formulation Rate amt product/ Mean no. ACP nymphs/flush Mean no. ACP adults/tap sample 100 gpa or % v/v 4 DAT 7 DAT 12 DAT 18 DAT 4 DAT 7 DAT 12 DAT 18 DAT 26 DAT Untreated check None 14.68a 8.83ab 14.43b 46.68a 0.35a 0.40b 0.43a 0.43a 0.85a Danitol 2.4 EC 12 oz 1.03c 0.80c 4.78c 10.00ef 0.00c 0.00d 0.00d 0.05c 0.25bc Apta 15 SCþ Dyne-amic 14 ozþ 0.25% 0.35c 0.25c 0.38c 4.50ef 0.03bc 0.00d 0.13cd 0.13bc 0.10bc Sivanto 200 SLþ Dyne-amic 10.5 ozþ 0.25% 2.75c 0.90c 6.43c 16.55cde 0.13bc 0.05cd 0.18bcd 0.18bc 0.90a Closer 240 SCþ Dyne-amic 5 ozþ 0.25% 2.23c 0.33c 1.93c 23.80bcd 0.03bc 0.13cd 0.13cd 0.20bc 0.63ab Closer 240 SCþ Response 5 ozþ 0.25% 1.35c 0.15c 1.68c 10.45def 0.08bc 0.03cd 0.18bcd 0.10bc 0.30bc Cygon 2E 16 oz 1.83c 0.48c 0.13c 2.70f 0.00c 0.00d 0.05d 0.05c 0.08c Malathion 57 EC 40 oz 1.25c 1.28c 1.50c 11.80def 0.03bc 0.03cd 0.15bcd 0.03c 0.45abc PFR 97 1 lb 10.73b 10.48a 22.50a 33.23ab 0.18b 0.20c 0.35ab 0.45a 0.85a Caffeineþ Induce 0.50%þ 0.50% 3.30c 5.56b 26.35a 29.45bc 0.13bc 0.60a 0.28abc 0.28ab 0.38abc Means in a column followed by the same letter are not significantly different (P> 0.05, LSD). V C The Author 2016. 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

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Published: Jan 1, 2016

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