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Response of Asian Citrus Psyllid to Four Application Rates of Fenpyroximate: Fall, 2015

Response of Asian Citrus Psyllid to Four Application Rates of Fenpyroximate: Fall, 2015 Arthropod Management Tests, 2016, 1–1 doi: 10.1093/amt/tsw020 Section D: Citrus, Nuts, and Other Tree Fruits ORANGE: Citrus sinensis (L.) Osbeck, ‘Hamlin’ Response of Asian Citrus Psyllid to Four Application Rates of Fenpyroximate: Fall, 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: jawwadq@ufl.edu Subject Editor: David Haviland Orange | Citrus sinensis Asian citrus psyllid | Diaphorina citri Asian citrus psyllid (ACP) is the key pest of Florida citrus due to its Relative density of ACP adults was assessed at 3, 9, 16, 23, 30, and role in the spread of “Huanglongbing” or citrus greening disease 37 DAT by taking two stem tap samples from each of the 15 ran- caused by Candidatus Liberibacter asiaticus. Application rate is a domly selected trees per plot. For one tap sample, a randomly cho- key parameter for achievement of good insecticidal control. The ex- sen branch was struck three times with a short length of PVC pipe perimental block at a commercial grove near Labelle, FL, consisted and individuals falling on a white plastic clipboard placed under- of 13-year-old “Hamlin” sweet orange planted at a density of 130 neath were counted. Data were subjected to ANOVA and means trees/acre. Four treatments and an untreated check were randomly separated using LSD (P¼ 0.05). distributed across 3 replicates in an RCBD each with 81-125-tree All treatments reduced nymphs compared to the untreated check plots over five rows. Treatments were four rates of fenpyroximate through 23 DAT (Table 1). There were no significant differences be- (Portal 5 EC) applied with Pure Spray Green (1% v/v) as an adju- tween the four rates except at 9 DAT when the 16 oz /ac rate was vant on 21 Sep 2015 using a Durand Wayland AF100-32 air blast providing less reduction compared to 32, 48, and 64 oz/ac rates. A speed sprayer, operating at 1.9 mph and 300 psi with four #4 three, significant reduction in adults compared to the untreated check was three, two and two hole whirl John Bean ceramic nozzles delivering observed with all four rates through 30 DAT and with 48 and 64 oz/ 120 gpa. Ten randomly selected shoots per plot were collected and ac rates through 37 DAT (Table 1). A positive trend of increased re- examined under a stereomicroscope in the laboratory to count live duction with rate was observed. No phytotoxicity was observed. ACP nymphs at 3, 9, 16, and 23 days after treatment (DAT). This research was supported by industry gifts of pesticide and funds. Table 1 Treatment/formulation Rate amt product/ Nymphs/flush Adults/tap sample 100 gpa or % v/v 3 DAT 9 DAT 16 DAT 23 DAT 3 DAT 9 DAT 16 DAT 23 DAT 30 DAT 37 DAT Untreated check 6.63 a 13.47 a 7.73 a 6.63 a 0.81 a 0.63 a 0.51 a 0.27 a 0.22 a 0.16 a Portal 5 ECþ 64 oz 0.27 b 0.30 c 0.17 b 1.00 b 0.04 c 0.00 c 0.02 c 0.02 c 0.00 b 0.02 b Pure Spray Green 1% Portal 5 ECþ 48 oz 0.77 b 0.67 c 0.13 b 0.33 b 0.05 c 0.01 c 0.00 c 0.00 c 0.01 b 0.03 b Pure Spray Green 1% Portal 5 ECþ 32 oz 1.70 b 1.10 c 1.10 b 0.30 b 0.12 c 0.08 bc 0.08 c 0.08 bc 0.04 b 0.19 a Pure Spray Green 1% Portal 5 ECþ 16 oz 2.93 b 5.47 b 2.20 b 1.87 b 0.37 b 0.22 b 0.23 b 0.13 b 0.07 b 0.12 ab Pure Spray Green 1% 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

Response of Asian Citrus Psyllid to Four Application Rates of Fenpyroximate: Fall, 2015

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Oxford University Press
Copyright
© 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/tsw020
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Abstract

Arthropod Management Tests, 2016, 1–1 doi: 10.1093/amt/tsw020 Section D: Citrus, Nuts, and Other Tree Fruits ORANGE: Citrus sinensis (L.) Osbeck, ‘Hamlin’ Response of Asian Citrus Psyllid to Four Application Rates of Fenpyroximate: Fall, 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: jawwadq@ufl.edu Subject Editor: David Haviland Orange | Citrus sinensis Asian citrus psyllid | Diaphorina citri Asian citrus psyllid (ACP) is the key pest of Florida citrus due to its Relative density of ACP adults was assessed at 3, 9, 16, 23, 30, and role in the spread of “Huanglongbing” or citrus greening disease 37 DAT by taking two stem tap samples from each of the 15 ran- caused by Candidatus Liberibacter asiaticus. Application rate is a domly selected trees per plot. For one tap sample, a randomly cho- key parameter for achievement of good insecticidal control. The ex- sen branch was struck three times with a short length of PVC pipe perimental block at a commercial grove near Labelle, FL, consisted and individuals falling on a white plastic clipboard placed under- of 13-year-old “Hamlin” sweet orange planted at a density of 130 neath were counted. Data were subjected to ANOVA and means trees/acre. Four treatments and an untreated check were randomly separated using LSD (P¼ 0.05). distributed across 3 replicates in an RCBD each with 81-125-tree All treatments reduced nymphs compared to the untreated check plots over five rows. Treatments were four rates of fenpyroximate through 23 DAT (Table 1). There were no significant differences be- (Portal 5 EC) applied with Pure Spray Green (1% v/v) as an adju- tween the four rates except at 9 DAT when the 16 oz /ac rate was vant on 21 Sep 2015 using a Durand Wayland AF100-32 air blast providing less reduction compared to 32, 48, and 64 oz/ac rates. A speed sprayer, operating at 1.9 mph and 300 psi with four #4 three, significant reduction in adults compared to the untreated check was three, two and two hole whirl John Bean ceramic nozzles delivering observed with all four rates through 30 DAT and with 48 and 64 oz/ 120 gpa. Ten randomly selected shoots per plot were collected and ac rates through 37 DAT (Table 1). A positive trend of increased re- examined under a stereomicroscope in the laboratory to count live duction with rate was observed. No phytotoxicity was observed. ACP nymphs at 3, 9, 16, and 23 days after treatment (DAT). This research was supported by industry gifts of pesticide and funds. Table 1 Treatment/formulation Rate amt product/ Nymphs/flush Adults/tap sample 100 gpa or % v/v 3 DAT 9 DAT 16 DAT 23 DAT 3 DAT 9 DAT 16 DAT 23 DAT 30 DAT 37 DAT Untreated check 6.63 a 13.47 a 7.73 a 6.63 a 0.81 a 0.63 a 0.51 a 0.27 a 0.22 a 0.16 a Portal 5 ECþ 64 oz 0.27 b 0.30 c 0.17 b 1.00 b 0.04 c 0.00 c 0.02 c 0.02 c 0.00 b 0.02 b Pure Spray Green 1% Portal 5 ECþ 48 oz 0.77 b 0.67 c 0.13 b 0.33 b 0.05 c 0.01 c 0.00 c 0.00 c 0.01 b 0.03 b Pure Spray Green 1% Portal 5 ECþ 32 oz 1.70 b 1.10 c 1.10 b 0.30 b 0.12 c 0.08 bc 0.08 c 0.08 bc 0.04 b 0.19 a Pure Spray Green 1% Portal 5 ECþ 16 oz 2.93 b 5.47 b 2.20 b 1.87 b 0.37 b 0.22 b 0.23 b 0.13 b 0.07 b 0.12 ab Pure Spray Green 1% 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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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2016

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