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RICE STINK BUG AND LONG-HORNED GRASSHOPPER CONTROL, 2012

RICE STINK BUG AND LONG-HORNED GRASSHOPPER CONTROL, 2012 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.F53 (F53) RICE: Oryza sativa L., ‘Sierra’ M. O. Way Texas A&M AgriLife Research and Extension Center 1509 Aggie Drive Beaumont, TX 77713 Phone: 409-658-2186 E-mail: moway@aesrg.tamu.edu R. A. Pearson E-mail: rawolff@ag.tamu.edu J. Wilson E-mail: justin.wilson@tamu.edu S. Morsello E-mail: shannon.morsello@syngenta.com Rice stink bug (RSB): Oebalus pugnax (Fabricius) Long-horned grasshopper (LHG): Conocephalus fasciatus (De Geer) The experiment was designed as a RCB with 6 treatments and 4 replications and was conducted at the Beaumont Center in a field of ratoon rice managed by the Texas Rice Improvement Association. Plot size was 21 ft by 40 ft. Treatments were applied on 20 Sep when rice was in heading to soft dough stages. Applications were made with a 2-person, CO2-powered spray rig equipped with 13, 80015 tip nozzles and 50 mesh screens (spray swath was 21 ft). Final spray volume was 26 gal/ac. Conditions were clam during the spray applications. At 1, 4, 8 and 12 DAT, 30 consecutive sweeps were taken in each plot. RSB and LHG were counted in each sample of sweeps. Data were analyzed by ANOVA and means separated by LSD. Populations of RSB were relatively high 1 and 4 DAT in untreated plots (Table 1). All insecticidal treatments provided good control of RSB (nymphs and adults) at 1 and 4 DAT. However, populations of RSB declined to very low levels at 8 and 12 DAT in untreated plots, so no meaningful conclusions can be drawn regarding these later sampling dates (Table 2). All insecticidal treatments significantly reduced LHG populations compared to the untreated at 4 DAT (Table 1). At 8 and 12 DAT, populations of LHG in untreated plots were to low to draw meaningful conclusions from the data (Table 2). This research was supported by industry gifts of pesticide and research funding. Table 1. a a 1 DAT 4 DAT Treatment/ b b b formulation Rate RSBA RSBN LHG RSBA RSBN LHG Untreated --- 16.3a 3.0a 5.5 12.8a 2.0a 6.8a Endigo ZC 5 fl oz/acre 0.5cd 0.3b 1.5 0.8b 0.0b 3.5b Endigo ZCX 5 fl oz/acre 2.3bc 0.0b 1.8 1.0b 0.3b 3.0b Karate Z 2.56 fl oz/acre 0.3d 0.0b 1.5 1.0b 0.3b 3.5b Centric 40WG 3.5 oz/acre 2.0bcd 0.0b 4.0 1.3b 0.0b 2.0bc Tenchu 20SG 9 oz/acre 3.0b 1.0b 3.8 4.3b 0.0b 1.0c Means in a column followed by the same letter are not significantly different (P = 0.05, ANOVA and LSD). Insects in 30 sweeps; DAT = days after treatment. RSBA = rice stink bug adults; RSBN = rice stink bug nymphs; LHG = long-horned grasshopper. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.F53 Table 2. a a 8 DAT 12 DAT Treatment/ b b b formulation Rate RSBA RSBN LHG RSBA RSBN LHG Untreated --- 1.5 0.3 1.8 1.8 1.0 1.5b Endigo ZC 5 fl oz/acre 1.5 0 0.3 0.5 0 0.8b Endigo ZCX 5 fl oz/acre 0.3 0 0.5 0.8 0 1.0b Karate Z 2.56 fl oz/acre 0.8 0 1.8 0 0 2.0ab Centric 40WG 3.5 oz/acre 2.3 0.3 1.0 0.5 0 3.5a Tenchu 20SG 9 oz/acre 1.0 0 1.5 0.3 0 1.8ab Means in a column followed by the same letter are not significantly different (P = 0.05, ANOVA and LSD). Insects in 30 sweeps; DAT = days after treatment. RSBA = rice stink bug adults; RSBN = rice stink bug nymphs; LHG = long-horned grasshopper. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

RICE STINK BUG AND LONG-HORNED GRASSHOPPER CONTROL, 2012

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10.4182/amt.2013.F53
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Abstract

Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.F53 (F53) RICE: Oryza sativa L., ‘Sierra’ M. O. Way Texas A&M AgriLife Research and Extension Center 1509 Aggie Drive Beaumont, TX 77713 Phone: 409-658-2186 E-mail: moway@aesrg.tamu.edu R. A. Pearson E-mail: rawolff@ag.tamu.edu J. Wilson E-mail: justin.wilson@tamu.edu S. Morsello E-mail: shannon.morsello@syngenta.com Rice stink bug (RSB): Oebalus pugnax (Fabricius) Long-horned grasshopper (LHG): Conocephalus fasciatus (De Geer) The experiment was designed as a RCB with 6 treatments and 4 replications and was conducted at the Beaumont Center in a field of ratoon rice managed by the Texas Rice Improvement Association. Plot size was 21 ft by 40 ft. Treatments were applied on 20 Sep when rice was in heading to soft dough stages. Applications were made with a 2-person, CO2-powered spray rig equipped with 13, 80015 tip nozzles and 50 mesh screens (spray swath was 21 ft). Final spray volume was 26 gal/ac. Conditions were clam during the spray applications. At 1, 4, 8 and 12 DAT, 30 consecutive sweeps were taken in each plot. RSB and LHG were counted in each sample of sweeps. Data were analyzed by ANOVA and means separated by LSD. Populations of RSB were relatively high 1 and 4 DAT in untreated plots (Table 1). All insecticidal treatments provided good control of RSB (nymphs and adults) at 1 and 4 DAT. However, populations of RSB declined to very low levels at 8 and 12 DAT in untreated plots, so no meaningful conclusions can be drawn regarding these later sampling dates (Table 2). All insecticidal treatments significantly reduced LHG populations compared to the untreated at 4 DAT (Table 1). At 8 and 12 DAT, populations of LHG in untreated plots were to low to draw meaningful conclusions from the data (Table 2). This research was supported by industry gifts of pesticide and research funding. Table 1. a a 1 DAT 4 DAT Treatment/ b b b formulation Rate RSBA RSBN LHG RSBA RSBN LHG Untreated --- 16.3a 3.0a 5.5 12.8a 2.0a 6.8a Endigo ZC 5 fl oz/acre 0.5cd 0.3b 1.5 0.8b 0.0b 3.5b Endigo ZCX 5 fl oz/acre 2.3bc 0.0b 1.8 1.0b 0.3b 3.0b Karate Z 2.56 fl oz/acre 0.3d 0.0b 1.5 1.0b 0.3b 3.5b Centric 40WG 3.5 oz/acre 2.0bcd 0.0b 4.0 1.3b 0.0b 2.0bc Tenchu 20SG 9 oz/acre 3.0b 1.0b 3.8 4.3b 0.0b 1.0c Means in a column followed by the same letter are not significantly different (P = 0.05, ANOVA and LSD). Insects in 30 sweeps; DAT = days after treatment. RSBA = rice stink bug adults; RSBN = rice stink bug nymphs; LHG = long-horned grasshopper. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.F53 Table 2. a a 8 DAT 12 DAT Treatment/ b b b formulation Rate RSBA RSBN LHG RSBA RSBN LHG Untreated --- 1.5 0.3 1.8 1.8 1.0 1.5b Endigo ZC 5 fl oz/acre 1.5 0 0.3 0.5 0 0.8b Endigo ZCX 5 fl oz/acre 0.3 0 0.5 0.8 0 1.0b Karate Z 2.56 fl oz/acre 0.8 0 1.8 0 0 2.0ab Centric 40WG 3.5 oz/acre 2.3 0.3 1.0 0.5 0 3.5a Tenchu 20SG 9 oz/acre 1.0 0 1.5 0.3 0 1.8ab Means in a column followed by the same letter are not significantly different (P = 0.05, ANOVA and LSD). Insects in 30 sweeps; DAT = days after treatment. RSBA = rice stink bug adults; RSBN = rice stink bug nymphs; LHG = long-horned grasshopper.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2013

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