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EVALUATION OF GAUCHO, CRUISER AND TEMIK, WITH AND WITHOUT AN ADDITIONAL BROADCAST APPLICATION, FOR CONTROL OF THRIPS IN VIRGINIA COTTON, 2002.

EVALUATION OF GAUCHO, CRUISER AND TEMIK, WITH AND WITHOUT AN ADDITIONAL BROADCAST APPLICATION,... (F47) COTTON: Gossypium hirsutum L., 'ST 4892 BR' EVALUATION OF GAUCHO, CRUISER AND TEMIK, WITH AND WITHOUT AN ADDITIONAL BROADCAST APPLICATION, FOR CONTROL OF THRIPS IN VIRGINIA COTTON, 2002. D. A. Herbert Jr Virginia Tech Tidewater Agri. Res. & Ext. Ctr. 6321 Holland Road Suffolk, VA 23437 Tel: (757) 657-6450, Ext. 122 Fax: (757) 657-9333 herbert@vt.edu S. Malone Tobacco thrips (TT): Frankliniella fusca (Hinds) Gaucho 600FS, Cruiser 5FS and Temik 15G, with and without an additional broadcast treatment of either Orthene 97 or Karate Z, were evaluated for control of thrips in Virginia cotton. Stoneville 4892 BR cotton was planted 30 Apr at the Virginia Tech Tidewater Agric. Res. & Ext. Ctr., Suffolk, VA, using 36-inch row spacing. In-furrow (IF) treatments were applied into the seed furrow at the time of planting using tractor- mounted inverted jars with lid holes calibrated to deliver exact amounts via gravity. Gaucho 600FS and Cruiser 5FS seed treatments (seed) were applied commercially. The foliar treatments were broadcast (BC) with a CO pressurized backpack sprayer calibrated to deliver 14.3 gpa at 18 psi through 8002VS nozzles spaced 18 inch apart on the spray boom. Foliar applications were made on 17 May at the first sign of true leaf emergence after the cotyledon stage or on 29 May at the 2-3 true leaf stage. A randomized complete block experimental design was used with four replicates; plots were 4 rows x 40 ft. Thrips injury to plants was determined by visually rating injury using a 0 to 5 scale, where 0 = no thrips induced plant injury, 1- 10% injured leaves, no bud injury; 2-25% injured leaves, no bud injury; 3-75% injured leaves, and 0-25% buds injured; 4-90% injured leaves, and greater than 25% buds injured; and 5 = dead plants. Yield was determined by harvesting the two center rows of each plot (80 row ft) using a commercial 2-row John Deere cotton combine. Sub-samples were ginned to determine lint versus seed and trash weight (40% lint, 60% seed and trash). Data were analyzed using ANOVA and LSD statistical procedures. Thrips injury reached 4.7 on 3 Jun in the untreated check. All treatments had significantly lower plant injury levels on all sample dates. Summarizing over the season, Gaucho 600FS provide slightly better protection st compared with Cruiser, and early foliar treatments (late cotyledon/1 true leaf stage) provided slightly better protection compared with later treatments (2--3 true leaf stage). Orthene 97 at 0.18 lb (AI)/acre and Karate Z at 0.015 lb (AI)/acre provided almost equal levels of control when applied to Cruiser 5FS treated cotton. Temik 15G provided the highest levels of control at 0.75 lb (AI)/acre, or at 0.53 lb (AI)/acre followed by an Orthene 97 at 0.18 lb (AI)/acre treatment All treatments resulted in significantly higher lint yields compared with the untreated check. Yield increases compared with the untreated check averaged 432 lb lint/acre and ranged from 346-480 lb lint/acre. Although not significant, yields were slightly higher with early versus late foliar applications, and slightly higher with Temik 15G versus Gaucho 600FS, and Gaucho 600FS versus Cruiser 5FS. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EVALUATION OF GAUCHO, CRUISER AND TEMIK, WITH AND WITHOUT AN ADDITIONAL BROADCAST APPLICATION, FOR CONTROL OF THRIPS IN VIRGINIA COTTON, 2002.

Herbert, D. A.; Malone, S.
Arthropod Management Tests , Volume 28 (1) – Jan 1, 2003
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Oxford University Press
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© Published by Oxford University Press.
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2155-9856
DOI
10.1093/amt/28.1.F47
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Abstract

(F47) COTTON: Gossypium hirsutum L., 'ST 4892 BR' EVALUATION OF GAUCHO, CRUISER AND TEMIK, WITH AND WITHOUT AN ADDITIONAL BROADCAST APPLICATION, FOR CONTROL OF THRIPS IN VIRGINIA COTTON, 2002. D. A. Herbert Jr Virginia Tech Tidewater Agri. Res. & Ext. Ctr. 6321 Holland Road Suffolk, VA 23437 Tel: (757) 657-6450, Ext. 122 Fax: (757) 657-9333 herbert@vt.edu S. Malone Tobacco thrips (TT): Frankliniella fusca (Hinds) Gaucho 600FS, Cruiser 5FS and Temik 15G, with and without an additional broadcast treatment of either Orthene 97 or Karate Z, were evaluated for control of thrips in Virginia cotton. Stoneville 4892 BR cotton was planted 30 Apr at the Virginia Tech Tidewater Agric. Res. & Ext. Ctr., Suffolk, VA, using 36-inch row spacing. In-furrow (IF) treatments were applied into the seed furrow at the time of planting using tractor- mounted inverted jars with lid holes calibrated to deliver exact amounts via gravity. Gaucho 600FS and Cruiser 5FS seed treatments (seed) were applied commercially. The foliar treatments were broadcast (BC) with a CO pressurized backpack sprayer calibrated to deliver 14.3 gpa at 18 psi through 8002VS nozzles spaced 18 inch apart on the spray boom. Foliar applications were made on 17 May at the first sign of true leaf emergence after the cotyledon stage or on 29 May at the 2-3 true leaf stage. A randomized complete block experimental design was used with four replicates; plots were 4 rows x 40 ft. Thrips injury to plants was determined by visually rating injury using a 0 to 5 scale, where 0 = no thrips induced plant injury, 1- 10% injured leaves, no bud injury; 2-25% injured leaves, no bud injury; 3-75% injured leaves, and 0-25% buds injured; 4-90% injured leaves, and greater than 25% buds injured; and 5 = dead plants. Yield was determined by harvesting the two center rows of each plot (80 row ft) using a commercial 2-row John Deere cotton combine. Sub-samples were ginned to determine lint versus seed and trash weight (40% lint, 60% seed and trash). Data were analyzed using ANOVA and LSD statistical procedures. Thrips injury reached 4.7 on 3 Jun in the untreated check. All treatments had significantly lower plant injury levels on all sample dates. Summarizing over the season, Gaucho 600FS provide slightly better protection st compared with Cruiser, and early foliar treatments (late cotyledon/1 true leaf stage) provided slightly better protection compared with later treatments (2--3 true leaf stage). Orthene 97 at 0.18 lb (AI)/acre and Karate Z at 0.015 lb (AI)/acre provided almost equal levels of control when applied to Cruiser 5FS treated cotton. Temik 15G provided the highest levels of control at 0.75 lb (AI)/acre, or at 0.53 lb (AI)/acre followed by an Orthene 97 at 0.18 lb (AI)/acre treatment All treatments resulted in significantly higher lint yields compared with the untreated check. Yield increases compared with the untreated check averaged 432 lb lint/acre and ranged from 346-480 lb lint/acre. Although not significant, yields were slightly higher with early versus late foliar applications, and slightly higher with Temik 15G versus Gaucho 600FS, and Gaucho 600FS versus Cruiser 5FS.

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2003

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