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EVALUATION OF BELT SC AND COBALT ADVANCED FOR SOYBEAN INSECT PEST CONTROL, 2011

EVALUATION OF BELT SC AND COBALT ADVANCED FOR SOYBEAN INSECT PEST CONTROL, 2011 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.F85 (F85) SOYBEAN: Glycine max (L.) Merr., ‘AG6730’ M. O. Way Texas AgriLife Research and Extension Center 1509 Aggie Drive Beaumont, TX 77713 Phone: 409-658-2186 No fax E-mail: moway@aesrg.tamu.edu R. A. Pearson E-mail: rawolff@ag.tamu.edu M. S. Nunez E-mail: mnunez@ag.tamu.edu S. Vyavhare E-mail: suhas.vyavhare@yahoo.com R. Medina E-mail: rfmedina@ag.tamu.edu Soybean looper (SL): Pseudoplusia includens (Walker) Green cloverworm (GCW): Plathypena scabra (Fabricius) Velvetbean caterpillar (VBC): Anticarsia gemmatalis (Hübner) Threecornered alfalfa hopper (TCAH): Spissistilus festinus (Say) The experiment was designed as a RCB with 4 treatments and 4 replications. Plot size was 20 ft by 4 rows (30 inches between rows). Soybeans were drill-planted 27 May and irrigated as needed. Recommended herbicides were applied preplant. No nitrogen fertilizer was applied, but seed was inoculated with bacteria to promote nodulation. In mid-Sep, Lepidoptera pest populations were observed to be increasing. Thus, treatments were applied 15 Sep using a 2-nozzle hand-held spray rig (no. 2 cone nozzles on 30 inch centers, 20 gpa final spray volume). Soybeans were R6 at this time. Plots were sampled for insects at 1, 5 and 8 DAT with a 15-inch diameter sweep net. Ten consecutive sweeps were taken in each plot on each sample date. The contents of each 10-sweep sample were placed in a plastic bag and frozen for later inspection and enumeration. Insect counts were transformed using square root of (X +1/2). Data were analyzed by ANOVA and means separated by LSD. Stink bug populations were too low during the experiment for data to be presented. However, SL, GCW and VBC populations were high enough in the untreated for meaningful evaluation. At 1 DAT, Belt SC and Cobalt Advanced treatments provided good control of GCW and VBC (Table 1). At 5 and 8 DAT, all treatments provided good control of all 3 Lepidoptera species (Tables 2 and 3). At 5 and 8 DAT, Cobalt Advanced significantly reduced TCAH populations (84 and 77% fewer TCAH, respectively, compared to the untreated). In conclusion, the higher rate of Belt SC appeared to provide slightly better control of SL than the lower rate, but both rates were satisfactory. The Cobalt Advanced treatment provided the best control of all pest insects encountered in the experiment. This research was supported by industry gifts of products and research funding. Table 1. No. per 10 sweeps 1 day after treatment Rate amt Soybean Green Velvetbean Treatment/formulation product/acre looper cloverworm caterpillar Total leps Belt SC 2 fl oz 4.0 5.25b 0.5b 9.75b Belt SC 3 fl oz 1.75 3.25b 1.5b 6.5c Cobalt Advanced 25 fl oz 2.0 0.25c 0b 2.25d Untreated --- 6.5 33.0a 4.5a 44.0a Means in a column followed by the same or no letter are not significantly different (P = 0.05, ANOVA and LSD). 1 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.F85 Table 2. No. per 10 sweeps 5 days after treatment Rate amt Soybean Green Velvetbean Treatment/formulation product/acre looper cloverworm caterpillar Total leps Belt SC 2 fl oz 2.0b 0b 0b 2.0b Belt SC 3 fl oz 0b 0b 0b 0b Cobalt Advanced 25 fl oz 1.5b 0b 0.25b 1.75b Untreated --- 8.5a 23.0a 11.75a 43.25a Means in a column followed by the same or no letter are not significantly different (P = 0.05, ANOVA and LSD). Table 3. No. per 10 sweeps 8 days after treatment Rate amt Soybean Green Velvetbean Treatment/formulation product/acre looper cloverworm caterpillar Total leps Belt SC 2 fl oz 1.25b 0b 0.5b 1.75b Belt SC 3 fl oz 0.5b 0b 0b 0.5b Cobalt Advanced 25 fl oz 1.75b 0.25b 0b 2.0b Untreated --- 8.0a 49.75a 9.0a 66.75a Means in a column followed by the same or no letter are not significantly different (P = 0.05, ANOVA and LSD). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EVALUATION OF BELT SC AND COBALT ADVANCED FOR SOYBEAN INSECT PEST CONTROL, 2011

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10.4182/amt.2012.F85
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Abstract

Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.F85 (F85) SOYBEAN: Glycine max (L.) Merr., ‘AG6730’ M. O. Way Texas AgriLife Research and Extension Center 1509 Aggie Drive Beaumont, TX 77713 Phone: 409-658-2186 No fax E-mail: moway@aesrg.tamu.edu R. A. Pearson E-mail: rawolff@ag.tamu.edu M. S. Nunez E-mail: mnunez@ag.tamu.edu S. Vyavhare E-mail: suhas.vyavhare@yahoo.com R. Medina E-mail: rfmedina@ag.tamu.edu Soybean looper (SL): Pseudoplusia includens (Walker) Green cloverworm (GCW): Plathypena scabra (Fabricius) Velvetbean caterpillar (VBC): Anticarsia gemmatalis (Hübner) Threecornered alfalfa hopper (TCAH): Spissistilus festinus (Say) The experiment was designed as a RCB with 4 treatments and 4 replications. Plot size was 20 ft by 4 rows (30 inches between rows). Soybeans were drill-planted 27 May and irrigated as needed. Recommended herbicides were applied preplant. No nitrogen fertilizer was applied, but seed was inoculated with bacteria to promote nodulation. In mid-Sep, Lepidoptera pest populations were observed to be increasing. Thus, treatments were applied 15 Sep using a 2-nozzle hand-held spray rig (no. 2 cone nozzles on 30 inch centers, 20 gpa final spray volume). Soybeans were R6 at this time. Plots were sampled for insects at 1, 5 and 8 DAT with a 15-inch diameter sweep net. Ten consecutive sweeps were taken in each plot on each sample date. The contents of each 10-sweep sample were placed in a plastic bag and frozen for later inspection and enumeration. Insect counts were transformed using square root of (X +1/2). Data were analyzed by ANOVA and means separated by LSD. Stink bug populations were too low during the experiment for data to be presented. However, SL, GCW and VBC populations were high enough in the untreated for meaningful evaluation. At 1 DAT, Belt SC and Cobalt Advanced treatments provided good control of GCW and VBC (Table 1). At 5 and 8 DAT, all treatments provided good control of all 3 Lepidoptera species (Tables 2 and 3). At 5 and 8 DAT, Cobalt Advanced significantly reduced TCAH populations (84 and 77% fewer TCAH, respectively, compared to the untreated). In conclusion, the higher rate of Belt SC appeared to provide slightly better control of SL than the lower rate, but both rates were satisfactory. The Cobalt Advanced treatment provided the best control of all pest insects encountered in the experiment. This research was supported by industry gifts of products and research funding. Table 1. No. per 10 sweeps 1 day after treatment Rate amt Soybean Green Velvetbean Treatment/formulation product/acre looper cloverworm caterpillar Total leps Belt SC 2 fl oz 4.0 5.25b 0.5b 9.75b Belt SC 3 fl oz 1.75 3.25b 1.5b 6.5c Cobalt Advanced 25 fl oz 2.0 0.25c 0b 2.25d Untreated --- 6.5 33.0a 4.5a 44.0a Means in a column followed by the same or no letter are not significantly different (P = 0.05, ANOVA and LSD). 1 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.F85 Table 2. No. per 10 sweeps 5 days after treatment Rate amt Soybean Green Velvetbean Treatment/formulation product/acre looper cloverworm caterpillar Total leps Belt SC 2 fl oz 2.0b 0b 0b 2.0b Belt SC 3 fl oz 0b 0b 0b 0b Cobalt Advanced 25 fl oz 1.5b 0b 0.25b 1.75b Untreated --- 8.5a 23.0a 11.75a 43.25a Means in a column followed by the same or no letter are not significantly different (P = 0.05, ANOVA and LSD). Table 3. No. per 10 sweeps 8 days after treatment Rate amt Soybean Green Velvetbean Treatment/formulation product/acre looper cloverworm caterpillar Total leps Belt SC 2 fl oz 1.25b 0b 0.5b 1.75b Belt SC 3 fl oz 0.5b 0b 0b 0.5b Cobalt Advanced 25 fl oz 1.75b 0.25b 0b 2.0b Untreated --- 8.0a 49.75a 9.0a 66.75a Means in a column followed by the same or no letter are not significantly different (P = 0.05, ANOVA and LSD).

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Arthropod Management TestsOxford University Press

Published: Jan 1, 2012

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