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FOLIAR APPLICATIONS OF SULFOXAFLOR, BYI02960, AND SOME COMMONLY USED INSECTICIDES FOR CONTROL OF ASIAN CITRUS PSYLLID AND CITRUS LEAFMINER IN ORANGES: SUMMER, 2011

FOLIAR APPLICATIONS OF SULFOXAFLOR, BYI02960, AND SOME COMMONLY USED INSECTICIDES FOR CONTROL OF... Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.D7 (D7) ORANGE: Citrus sinensis (L.) Osbeck, ‘Valencia’ FOLIAR APPLICATIONS OF SULFOXAFLOR, BYI02960, AND SOME COMMONLY USED INSECTICIDES FOR CONTROL OF ASIAN CITRUS PSYLLID AND CITRUS LEAFMINER IN ORANGES: SUMMER, 2011 Philip A. Stansly 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 Email: pstansly@ufl.edu Jawwad A. Qureshi Email: jawwadq@ufl.edu Barry C. Kostyk Email: bkostyk@ufl.edu Asian citrus psyllid (ACP): Diaphorina citri Kuwayama Citrus leafminer (CLM): Phyllocnistis citrella Stainton ACP and CLM are two economically important pests of citrus due in large part to their role in the spread of greening disease or “huanglongbing” and citrus canker caused by Xanthomonas axonopodis pv. Citri respectively. Therefore, control of both ACP and CLM is key to reduce spread of the associated diseases in Florida citrus. The experimental block at the Southwest Florida Research and Education Center (SWFREC), Immokalee, Florida consisted of 16-yr-old sweet orange ‘Valencia’ trees planted on double-row raised beds at a density of 132 trees/acre. Trees were irrigated by micro-sprinklers and subjected to conventional cultural practices. Selected branches were pruned 3 weeks prior to application to encourage growth of new shoots essential for reproduction of ACP and CLM. Eleven treatments and an untreated check were randomly distributed across 4 replicates in 3 rows separated by a buffer row. Each replicate contained 12 five-tree plots. Treatments were applied on 16 Jun 2011 using a Durand Wayland AF100-32 air blast speed sprayer operating at 1.9 mph and 400 psi with four John Beane Ceramics nozzles (#4, #4, #3 and #3) delivering 120 gpa. Evaluations were made at 5, 12, 19, 26, 33, and 40 days after treatment (DAT). Twelve randomly selected shoots per plot were collected and examined under a stereomicroscope in the laboratory to count ACP nymphs. Five of the twelve shoots were examined for CLM by checking three fully expanded leaves on each shoot under the microscope to count CLM larvae. Density of ACP adults was assessed from three of the four trees in each plot by counting adult insects falling on a white clipboard placed under randomly chosen branches which were then struck three times with the PVC pipe to make a count for one “tap” sample. Four tap samples were conducted per tree. Data were subjected to ANOVA and means separated using LSD (P = 0.05) are presented. All treatments reduced nymphs compared to the untreated check through 33 DAT. At that time, most reduction was observed with Sulfoxaflor 20 SC at 4.28 or 5.7 oz/ac, both with citrus oil, and BYI 02960 200 Sl at14 oz/ac with Induce (Table 1). However, none of these was significantly better than any other treatment except for Sulfoxaflor 20 SC at the low (2.85 oz) rate alone. All treatments except Sulfoxaflor 20 SC applied at 2.85 oz alone reduced adults through 19 DAT at which time Sulfoxaflor 20 SC + citrus oil at the two higher rates were the best treatments with no nymphs observed in the sample. No significant treatment effects were seen at 26 DAT but were again observed through 40 DAT. Effective treatments at that time were Danitol 24 EC at 16 oz/ac, Delegate 25 WG at 4 oz/ac, Sulfoxaflor 20SC at 4.28 oz/ac and BYI02960 at 10.5 and 12 oz/ac, all with citrus oil. Thus, data from two sample dates (5 DAT for nymphs and 19 DAT for adults) suggest that Sulfoxaflor worked better on ACP with citrus oil than without, with no advantage for the 5.7 oz/ac rate over the 4.28 oz/ac rate and the 10.5 oz/ac rate seemed to be adequate for BYI02960. Significantly fewer CLM larvae compared to untreated check were observed in all treatments at 5 DAT except for Movento MPC + Citrus oil (Table 2). However, only Delegate 25 WG + Citrus oil was still providing control at 12 DAT. 1 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.D7 Rate ACP nymphs/shoot ACP Adults/tap sample Treatment/ (product/ formulation acre or % v/v) 5 DAT 12 DAT 19 DAT 26 DAT 33 DAT 5 DAT 12 DAT 19 DAT 26 DAT 33 DAT 40 DAT Untreated check 13.45a 24.50a 26.21a 13.29a 3.50a 0.81a 0.73a 0.40a 0.29a 0.44ab 0.50ab Danitol 2.4 EC 16 oz + 2% 0.60bc 1.46d 3.33bc 1.23c 0.94bc 0.04c 0.02b 0.00b 0.06a 0.04c 0.04c + Citrus Oil Delegate 25 WG 4 oz + 2% 1.06bc 2.33cd 4.06bc 5.56b 1.25bc 0.04c 0.06b 0.08b 0.17a 0.27abc 0.10c + Citrus oil Sulfoxaflor 20 SC 2.85 oz 2.71b 6.02bc 5.33bc 3.81bc 1.73b 0.10c 0.29b 0.42a 0.23a 0.19abc 0.21bc Sulfoxaflor 20 SC 2.85 oz + 2% 0.54c 3.77bcd 2.83bc 4.13bc 0.75bc 0.00c 0.23b 0.02b 0.21a 0.31abc 0.25bc + Citrus oil Sulfoxaflor 20 SC 4.28 oz + 2% 0.02c 2.35cd 1.08c 0.90c 0.48c 0.13c 0.10b 0.00c 0.13a 0.06c 0.08c + Citrus oil Sulfoxaflor 20 SC 5.7 oz + 2% 0.63bc 3.15bcd 3.98bc 3.31bc 0.44c 0.06c 0.19b 0.00c 0.23a 0.10c 0.19bc + Citrus oil BYI02960 200 SL 10.5 oz + 3% 0.44c 0.88d 3.10bc 1.92c 0.60bc 0.04c 0.04b 0.02b 0.02a 0.08c 0.10c + Citrus oil BYI02960 200 SL 12 oz + 3% 0.35c 1.40d 4.04bc 2.60bc 1.02bc 0.17bc 0.19b 0.04b 0.06a 0.10c 0.10c + Citrus oil BYI02960 200 SL 14 oz + 3% 1.15bc 2.04cd 4.71bc 2.73bc 1.13bc 0.44b 0.15b 0.10b 0.21a 0.48a 0.15bc + Citrus oil BYI02960 200 SL 14 oz + 0.25% 0.52c 0.81d 3.83bc 3.25bc 0.35c 0.15bc 0.13b 0.04b 0.17a 0.15bc 0.83a + Induce Movento MPC 16.0 oz + 3% 1.52bc 6.92b 6.31b 5.46b 0.56bc 0.29bc 0.29b 0.10b 0.17a 0.08c 0.21bc + Citrus oil Means in a column followed by the same letter are not significantly different (P > 0.05, LSD) Rate Larvae Treatment/ (product/ formulation acre or % v/v) 5 DAT 12 DAT Untreated check 1.20a 1.60ab Danitol 2.4 EC 16 oz + 2% 0.00e 0.95bc + Citrus oil Delegate 25 WG 4 oz + 2% 0.00e 0.20c + Citrus oil Sulfoxaflor 20 SC 2.85 oz 0.45bcde 2.10a Sulfoxaflor 20 SC 2.85 oz + 2% 0.20cde 1.65ab + Citrus oil Sulfoxaflor 20 SC 4.28 oz + 2% 0.20cde 1.65ab + Citrus oil Sulfoxaflor 20 SC 5.7 oz + 2% 0.45bcde 1.35ab + Citrus oil BYI02960 200 SL 10.5 oz + 3% 0.55bc 2.00a + Citrus oil BYI02960 200 SL 12 oz + 3% 0.05de 1.45ab + Citrus oil BYI02960 200 SL 14 oz + 3% 0.50bcd 1.30ab + Citrus oil BYI02960 200 SL 14 oz + 0.25% 0.25cde 1.55ab + Induce Movento MPC 16.0 oz + 3% 0.90ab 0.95bc + Citrus oil http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

FOLIAR APPLICATIONS OF SULFOXAFLOR, BYI02960, AND SOME COMMONLY USED INSECTICIDES FOR CONTROL OF ASIAN CITRUS PSYLLID AND CITRUS LEAFMINER IN ORANGES: SUMMER, 2011

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10.4182/amt.2012.D7
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Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.D7 (D7) ORANGE: Citrus sinensis (L.) Osbeck, ‘Valencia’ FOLIAR APPLICATIONS OF SULFOXAFLOR, BYI02960, AND SOME COMMONLY USED INSECTICIDES FOR CONTROL OF ASIAN CITRUS PSYLLID AND CITRUS LEAFMINER IN ORANGES: SUMMER, 2011 Philip A. Stansly 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 Email: pstansly@ufl.edu Jawwad A. Qureshi Email: jawwadq@ufl.edu Barry C. Kostyk Email: bkostyk@ufl.edu Asian citrus psyllid (ACP): Diaphorina citri Kuwayama Citrus leafminer (CLM): Phyllocnistis citrella Stainton ACP and CLM are two economically important pests of citrus due in large part to their role in the spread of greening disease or “huanglongbing” and citrus canker caused by Xanthomonas axonopodis pv. Citri respectively. Therefore, control of both ACP and CLM is key to reduce spread of the associated diseases in Florida citrus. The experimental block at the Southwest Florida Research and Education Center (SWFREC), Immokalee, Florida consisted of 16-yr-old sweet orange ‘Valencia’ trees planted on double-row raised beds at a density of 132 trees/acre. Trees were irrigated by micro-sprinklers and subjected to conventional cultural practices. Selected branches were pruned 3 weeks prior to application to encourage growth of new shoots essential for reproduction of ACP and CLM. Eleven treatments and an untreated check were randomly distributed across 4 replicates in 3 rows separated by a buffer row. Each replicate contained 12 five-tree plots. Treatments were applied on 16 Jun 2011 using a Durand Wayland AF100-32 air blast speed sprayer operating at 1.9 mph and 400 psi with four John Beane Ceramics nozzles (#4, #4, #3 and #3) delivering 120 gpa. Evaluations were made at 5, 12, 19, 26, 33, and 40 days after treatment (DAT). Twelve randomly selected shoots per plot were collected and examined under a stereomicroscope in the laboratory to count ACP nymphs. Five of the twelve shoots were examined for CLM by checking three fully expanded leaves on each shoot under the microscope to count CLM larvae. Density of ACP adults was assessed from three of the four trees in each plot by counting adult insects falling on a white clipboard placed under randomly chosen branches which were then struck three times with the PVC pipe to make a count for one “tap” sample. Four tap samples were conducted per tree. Data were subjected to ANOVA and means separated using LSD (P = 0.05) are presented. All treatments reduced nymphs compared to the untreated check through 33 DAT. At that time, most reduction was observed with Sulfoxaflor 20 SC at 4.28 or 5.7 oz/ac, both with citrus oil, and BYI 02960 200 Sl at14 oz/ac with Induce (Table 1). However, none of these was significantly better than any other treatment except for Sulfoxaflor 20 SC at the low (2.85 oz) rate alone. All treatments except Sulfoxaflor 20 SC applied at 2.85 oz alone reduced adults through 19 DAT at which time Sulfoxaflor 20 SC + citrus oil at the two higher rates were the best treatments with no nymphs observed in the sample. No significant treatment effects were seen at 26 DAT but were again observed through 40 DAT. Effective treatments at that time were Danitol 24 EC at 16 oz/ac, Delegate 25 WG at 4 oz/ac, Sulfoxaflor 20SC at 4.28 oz/ac and BYI02960 at 10.5 and 12 oz/ac, all with citrus oil. Thus, data from two sample dates (5 DAT for nymphs and 19 DAT for adults) suggest that Sulfoxaflor worked better on ACP with citrus oil than without, with no advantage for the 5.7 oz/ac rate over the 4.28 oz/ac rate and the 10.5 oz/ac rate seemed to be adequate for BYI02960. Significantly fewer CLM larvae compared to untreated check were observed in all treatments at 5 DAT except for Movento MPC + Citrus oil (Table 2). However, only Delegate 25 WG + Citrus oil was still providing control at 12 DAT. 1 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.D7 Rate ACP nymphs/shoot ACP Adults/tap sample Treatment/ (product/ formulation acre or % v/v) 5 DAT 12 DAT 19 DAT 26 DAT 33 DAT 5 DAT 12 DAT 19 DAT 26 DAT 33 DAT 40 DAT Untreated check 13.45a 24.50a 26.21a 13.29a 3.50a 0.81a 0.73a 0.40a 0.29a 0.44ab 0.50ab Danitol 2.4 EC 16 oz + 2% 0.60bc 1.46d 3.33bc 1.23c 0.94bc 0.04c 0.02b 0.00b 0.06a 0.04c 0.04c + Citrus Oil Delegate 25 WG 4 oz + 2% 1.06bc 2.33cd 4.06bc 5.56b 1.25bc 0.04c 0.06b 0.08b 0.17a 0.27abc 0.10c + Citrus oil Sulfoxaflor 20 SC 2.85 oz 2.71b 6.02bc 5.33bc 3.81bc 1.73b 0.10c 0.29b 0.42a 0.23a 0.19abc 0.21bc Sulfoxaflor 20 SC 2.85 oz + 2% 0.54c 3.77bcd 2.83bc 4.13bc 0.75bc 0.00c 0.23b 0.02b 0.21a 0.31abc 0.25bc + Citrus oil Sulfoxaflor 20 SC 4.28 oz + 2% 0.02c 2.35cd 1.08c 0.90c 0.48c 0.13c 0.10b 0.00c 0.13a 0.06c 0.08c + Citrus oil Sulfoxaflor 20 SC 5.7 oz + 2% 0.63bc 3.15bcd 3.98bc 3.31bc 0.44c 0.06c 0.19b 0.00c 0.23a 0.10c 0.19bc + Citrus oil BYI02960 200 SL 10.5 oz + 3% 0.44c 0.88d 3.10bc 1.92c 0.60bc 0.04c 0.04b 0.02b 0.02a 0.08c 0.10c + Citrus oil BYI02960 200 SL 12 oz + 3% 0.35c 1.40d 4.04bc 2.60bc 1.02bc 0.17bc 0.19b 0.04b 0.06a 0.10c 0.10c + Citrus oil BYI02960 200 SL 14 oz + 3% 1.15bc 2.04cd 4.71bc 2.73bc 1.13bc 0.44b 0.15b 0.10b 0.21a 0.48a 0.15bc + Citrus oil BYI02960 200 SL 14 oz + 0.25% 0.52c 0.81d 3.83bc 3.25bc 0.35c 0.15bc 0.13b 0.04b 0.17a 0.15bc 0.83a + Induce Movento MPC 16.0 oz + 3% 1.52bc 6.92b 6.31b 5.46b 0.56bc 0.29bc 0.29b 0.10b 0.17a 0.08c 0.21bc + Citrus oil Means in a column followed by the same letter are not significantly different (P > 0.05, LSD) Rate Larvae Treatment/ (product/ formulation acre or % v/v) 5 DAT 12 DAT Untreated check 1.20a 1.60ab Danitol 2.4 EC 16 oz + 2% 0.00e 0.95bc + Citrus oil Delegate 25 WG 4 oz + 2% 0.00e 0.20c + Citrus oil Sulfoxaflor 20 SC 2.85 oz 0.45bcde 2.10a Sulfoxaflor 20 SC 2.85 oz + 2% 0.20cde 1.65ab + Citrus oil Sulfoxaflor 20 SC 4.28 oz + 2% 0.20cde 1.65ab + Citrus oil Sulfoxaflor 20 SC 5.7 oz + 2% 0.45bcde 1.35ab + Citrus oil BYI02960 200 SL 10.5 oz + 3% 0.55bc 2.00a + Citrus oil BYI02960 200 SL 12 oz + 3% 0.05de 1.45ab + Citrus oil BYI02960 200 SL 14 oz + 3% 0.50bcd 1.30ab + Citrus oil BYI02960 200 SL 14 oz + 0.25% 0.25cde 1.55ab + Induce Movento MPC 16.0 oz + 3% 0.90ab 0.95bc + Citrus oil

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Arthropod Management TestsOxford University Press

Published: Jan 1, 2012

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