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EVALUATION OF IN-FURROW APPLICATIONS OF COUNTER FOR CONTROL OF THRIPS IN COTTON, 2011

EVALUATION OF IN-FURROW APPLICATIONS OF COUNTER FOR CONTROL OF THRIPS IN COTTON, 2011 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.F56 (F56) COTTON: Gossypium hirsutum L., ‘Fibermax 9160B2RF’ D. L. Kerns Texas AgriLife Extension Service Department of Entomology Lubbock, TX 79403 Phone: (806) 746-4045 Fax: (806) 746-4057 Email: dlkerns@ag.tamu.edu B. J. Kesey Texas AgriLife Extension Service Email: rjkesey@ag.tamu.edu Onion thrips (OT): Thrips tabaci Lindeman Western flower thrips (WFT): Frankliniella occidentalis (Pergande) This study was conducted at the AGSCARES research facility in Lamesa, TX. The test was planted on 8 May and then re-planted due to poor a stand on 1 Jun. The variety was ‘Fibermax 9160B2F’ was planted on 40-inch rows and was irrigated via a pivot sprinkler. The test was a RCBD with six replications. Plots were 4-rows wide × 35 ft long. Treatments included an untreated check, in-furrow applications of Counter at 4.0, 5.25 and 6.55 lb/acre, Temik at 3.5 and 5.0 lb/acre and the seed treatment, Aeris. In-furrow treatments were applied at planting using a standard 4-row planter equipped with granular insecticide boxes. Thrips were estimated weekly following plant emergence by countingadult and immature thrips per 10 plants. Thrips samples were also taken for species identification. Yields were estimated using a mechanized cotton stripper with integrated scales on 9 Nov. Data were analyzed using ANOVA and means were separated based on an F-protected LSD (P ≤ 0.05). The thrips species composition was approximately 86% OT and 14% WFT. Following the first planting significant differences were noted among treatments regarding thrips control (Table 1). At 5 days after emergence (5 DAE), all of the treatments had fewer adults thrips than the untreated. At this time the untreated was averaging 0.93 thrips per plant which is considered a treatable population. Results for adult thrips at 12 DAE were similar to 5 DAE, but when evaluating total thrips, Temik at 3.5 lb did not differ from the untreated. The reason Temik at 3.5 lb did not differ may be due to inadequate soil moisture availability for optimal product uptake by the plants. The most effective treatment was the Aeris seed treatment, but this treatment did not significantly differ from the higher two rates of Counter, or the high rate of Temik. Following the second planting, the thrips population in the area had subsided and there were no detectable differences among treatments (Table 2). This research was supported by industry gifts of products and research funding. Table 1. 20 May – cotyledon stage 25 May – cotyledon stage (12 DAP; 5 DAE) (17 DAP; 12 DAE) Thrips per plant Thrips per plant Treatment/ Rate lb formulation product/acre immatures adults total immatures adults total Untreated -- 0.03a 0.90a 0.93a 0.02a 0.57a 0.58a Counter 20G 4.00 0.03a 0.25b 0.28b 0.05a 0.25b 0.30bc Counter 20G 5.25 0.02a 0.18b 0.20b 0.00a 0.18b 0.18bcd Counter 20G 6.50 0.00a 0.17b 0.17b 0.00a 0.17b 0.17cd Temik 15G 3.50 0.05a 0.27b 0.32b 0.12a 0.27b 0.38ab Temik 15G 7.00 0.00a 0.12b 0.12b 0.00a 0.12b 0.12cd Aeris 48DS -- 0.00a 0.05b 0.05b 0.00a 0.05b 0.05d Means is a column followed by the same letter are not statistically different ( F protected LSD; P < 0.05). Aeris is a mixture of Gaucho Grande 5FS at 0.375 mg(AI)/seed and thiodicarb at 0.375 mg(AI)/seed. 1 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.F56 Table 2. 15 June – coty stage 21 June – 2 leaf stage 28 June – 4 leaf stage (14 DAP; 8 DAE) (21 DAP; 15 DAE) (28 DAP; 22 DAE) Thrips per plant Thrips per plant Thrips per plant Treatment/ Rate lb formulation product/acre immatures adults total immatures adults total immatures adults total Untreated -- 0.02a 0.05a 0.07a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Counter 20G 4.00 0.00a 0.02a 0.02a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Counter 20G 5.25 0.00a 0.02a 0.02a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Counter 20G 6.50 0.00a 0.03a 0.03a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Temik 15G 3.50 0.00a 0.03a 0.03a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Temik 15G 7.00 0.00a 0.03a 0.03a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Aeris 48DS -- 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Means is a column followed by the same letter are not statistically different ( F protected LSD”P < 0.05). Aeris is a mixture of Gaucho Grande 5FS at 0.375 mg(AI)/seed and thiodicarb at 0.375 mg(AI)/seed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EVALUATION OF IN-FURROW APPLICATIONS OF COUNTER FOR CONTROL OF THRIPS IN COTTON, 2011

Arthropod Management Tests , Volume 37 (1) – Jan 1, 2012

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Abstract

Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.F56 (F56) COTTON: Gossypium hirsutum L., ‘Fibermax 9160B2RF’ D. L. Kerns Texas AgriLife Extension Service Department of Entomology Lubbock, TX 79403 Phone: (806) 746-4045 Fax: (806) 746-4057 Email: dlkerns@ag.tamu.edu B. J. Kesey Texas AgriLife Extension Service Email: rjkesey@ag.tamu.edu Onion thrips (OT): Thrips tabaci Lindeman Western flower thrips (WFT): Frankliniella occidentalis (Pergande) This study was conducted at the AGSCARES research facility in Lamesa, TX. The test was planted on 8 May and then re-planted due to poor a stand on 1 Jun. The variety was ‘Fibermax 9160B2F’ was planted on 40-inch rows and was irrigated via a pivot sprinkler. The test was a RCBD with six replications. Plots were 4-rows wide × 35 ft long. Treatments included an untreated check, in-furrow applications of Counter at 4.0, 5.25 and 6.55 lb/acre, Temik at 3.5 and 5.0 lb/acre and the seed treatment, Aeris. In-furrow treatments were applied at planting using a standard 4-row planter equipped with granular insecticide boxes. Thrips were estimated weekly following plant emergence by countingadult and immature thrips per 10 plants. Thrips samples were also taken for species identification. Yields were estimated using a mechanized cotton stripper with integrated scales on 9 Nov. Data were analyzed using ANOVA and means were separated based on an F-protected LSD (P ≤ 0.05). The thrips species composition was approximately 86% OT and 14% WFT. Following the first planting significant differences were noted among treatments regarding thrips control (Table 1). At 5 days after emergence (5 DAE), all of the treatments had fewer adults thrips than the untreated. At this time the untreated was averaging 0.93 thrips per plant which is considered a treatable population. Results for adult thrips at 12 DAE were similar to 5 DAE, but when evaluating total thrips, Temik at 3.5 lb did not differ from the untreated. The reason Temik at 3.5 lb did not differ may be due to inadequate soil moisture availability for optimal product uptake by the plants. The most effective treatment was the Aeris seed treatment, but this treatment did not significantly differ from the higher two rates of Counter, or the high rate of Temik. Following the second planting, the thrips population in the area had subsided and there were no detectable differences among treatments (Table 2). This research was supported by industry gifts of products and research funding. Table 1. 20 May – cotyledon stage 25 May – cotyledon stage (12 DAP; 5 DAE) (17 DAP; 12 DAE) Thrips per plant Thrips per plant Treatment/ Rate lb formulation product/acre immatures adults total immatures adults total Untreated -- 0.03a 0.90a 0.93a 0.02a 0.57a 0.58a Counter 20G 4.00 0.03a 0.25b 0.28b 0.05a 0.25b 0.30bc Counter 20G 5.25 0.02a 0.18b 0.20b 0.00a 0.18b 0.18bcd Counter 20G 6.50 0.00a 0.17b 0.17b 0.00a 0.17b 0.17cd Temik 15G 3.50 0.05a 0.27b 0.32b 0.12a 0.27b 0.38ab Temik 15G 7.00 0.00a 0.12b 0.12b 0.00a 0.12b 0.12cd Aeris 48DS -- 0.00a 0.05b 0.05b 0.00a 0.05b 0.05d Means is a column followed by the same letter are not statistically different ( F protected LSD; P < 0.05). Aeris is a mixture of Gaucho Grande 5FS at 0.375 mg(AI)/seed and thiodicarb at 0.375 mg(AI)/seed. 1 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.F56 Table 2. 15 June – coty stage 21 June – 2 leaf stage 28 June – 4 leaf stage (14 DAP; 8 DAE) (21 DAP; 15 DAE) (28 DAP; 22 DAE) Thrips per plant Thrips per plant Thrips per plant Treatment/ Rate lb formulation product/acre immatures adults total immatures adults total immatures adults total Untreated -- 0.02a 0.05a 0.07a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Counter 20G 4.00 0.00a 0.02a 0.02a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Counter 20G 5.25 0.00a 0.02a 0.02a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Counter 20G 6.50 0.00a 0.03a 0.03a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Temik 15G 3.50 0.00a 0.03a 0.03a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Temik 15G 7.00 0.00a 0.03a 0.03a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Aeris 48DS -- 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a 0.00a Means is a column followed by the same letter are not statistically different ( F protected LSD”P < 0.05). Aeris is a mixture of Gaucho Grande 5FS at 0.375 mg(AI)/seed and thiodicarb at 0.375 mg(AI)/seed.

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Arthropod Management TestsOxford University Press

Published: Jan 1, 2012

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