Onion Thrips Control, Trial 2,1996
Cranshaw,, Whitney;Sclar, D., Casey;Gerace,, D.;Tupy,, A.
1997-01-01 00:00:00
Downloaded from https://academic.oup.com/amt/article-abstract/22/1/142/4640183 by DeepDyve user on 21 July 2020 142 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROPS ONION: Allium cepa L. 'Vega' Whitney Cranshaw, D. Casey Sclar, D. Gerace, (69E) Onion thrips; Thrips tabaci Lindeman and A. Tupy Department of Bioagricultural Sciences and Pest Management Colorado State University Ft. Collins, CO 80523 (970)491-6781 ONION THRIPS CONTROL, TRIAL 2,1996 : Trials were conducted in Ft. Collins, CO , using transplanted onions (cv. Vega) in single rows at 30-in spacing. Plots were 25-ft in length arranged in a randomized complete block design with 4 replications. Treatments were applied on two dates (14 June, 7 Jul) using a C0 compressed air sprayer delivering 18.4 gal/A at 30 psi in two passes directed along the sides of the planting. An organosilicani spreader (Kinetic, 6 fl oz/A) was added to all treatments. Application dates varied among treatments. Evaluations were made by examining 10 plants pei plot and counting all thrips present in the next area of the onions. All treatments provided significant control after the first application, with the pyrethroids TD-2344-02 and Warrior showing the longest persistence Mean no. thrips/plant Treatment and Rate/acre 17 June 24 June 2 Jul 11 Jul 19 Jul Untreated Check 10.0 a 24.7 a 60.6 a 58.0 a 34.2 a TD 2344-02 0.8E 4 fl oz 1.8 b 5.3 b 19.8 c 19.1 b 9.1 c TD 2344-02 0.8E 5.6 fl oz 9.8 b 6.4 b 23.9 c 16.4 b 6.0 c Orthene75 S l.Olb(AI) 1.2 b 14.1 b 40.8 b 26.3 b 7.0 c Orthene75 S l.Olb(AI) + V-71369 0.86E 50 g (AI) 2.0 b 10.2 b 43.4 b 14.5 b 8.6 c V-71369 0.86E50gr(AI) 9.4 a 13.8 b 55.9 ab 52.6 a 19.7 b Warrior IE 0.02 lb (AI) 1.0 b 4.0 b 22.2 c 11.8 b 7.6 c Vydate 2L 3 pts fb Warrior IE" 0.02 lb (AI) 5.1 b 13.1 b 56.2 ab 10.8 b 5.6 c Warrior IE 0.02 lb (AI) fb Vydate" 3 pts 1.2 b 4.8 b 17.7 c 22.7 b 12.0 c Mean no. Thrips/plant 25 Jul 1 Aug Treatment and Rate/acre Untreated Check 24.3 a 1.7 ab TD-2344-02 0.8E 4 fl oz 26.9 a 3.1 ab TD-2344-02 0.8E 5.6 fl oz 19.3 a 3.0 ab Orthene 75S 1.0 lb (AI) 15.8 a 0.8 b Orthene75 S l.Olb(AI) + V-71369 0.86E 50 g (AI) 23.5 a 5.0 a V-71369 0.86E 50 gr (AI) 16.2 a 1.8 ab Warrior IE 0.02 lb (AI) 18.7 a 2.3 ab Vydate 2L 3 pts fb Warrior IE" 0.02 lb (AI) 17.8 a 1.5 ab Warrior IE 0.02 lb (AI) fb Vydate" 3 pt 19.9 a 1.5 ab 'Numbers within a column followed by the same letter are not significantly different (P = 0.05) by SNK. "Vydate/Warrior treatments involved alternating the two insecticides between the two application dates, fb = followed by.
http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.pngArthropod Management TestsOxford University Presshttp://www.deepdyve.com/lp/oxford-university-press/onion-thrips-control-trial-2-1996-33Xmxw1kAV
Downloaded from https://academic.oup.com/amt/article-abstract/22/1/142/4640183 by DeepDyve user on 21 July 2020 142 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROPS ONION: Allium cepa L. 'Vega' Whitney Cranshaw, D. Casey Sclar, D. Gerace, (69E) Onion thrips; Thrips tabaci Lindeman and A. Tupy Department of Bioagricultural Sciences and Pest Management Colorado State University Ft. Collins, CO 80523 (970)491-6781 ONION THRIPS CONTROL, TRIAL 2,1996 : Trials were conducted in Ft. Collins, CO , using transplanted onions (cv. Vega) in single rows at 30-in spacing. Plots were 25-ft in length arranged in a randomized complete block design with 4 replications. Treatments were applied on two dates (14 June, 7 Jul) using a C0 compressed air sprayer delivering 18.4 gal/A at 30 psi in two passes directed along the sides of the planting. An organosilicani spreader (Kinetic, 6 fl oz/A) was added to all treatments. Application dates varied among treatments. Evaluations were made by examining 10 plants pei plot and counting all thrips present in the next area of the onions. All treatments provided significant control after the first application, with the pyrethroids TD-2344-02 and Warrior showing the longest persistence Mean no. thrips/plant Treatment and Rate/acre 17 June 24 June 2 Jul 11 Jul 19 Jul Untreated Check 10.0 a 24.7 a 60.6 a 58.0 a 34.2 a TD 2344-02 0.8E 4 fl oz 1.8 b 5.3 b 19.8 c 19.1 b 9.1 c TD 2344-02 0.8E 5.6 fl oz 9.8 b 6.4 b 23.9 c 16.4 b 6.0 c Orthene75 S l.Olb(AI) 1.2 b 14.1 b 40.8 b 26.3 b 7.0 c Orthene75 S l.Olb(AI) + V-71369 0.86E 50 g (AI) 2.0 b 10.2 b 43.4 b 14.5 b 8.6 c V-71369 0.86E50gr(AI) 9.4 a 13.8 b 55.9 ab 52.6 a 19.7 b Warrior IE 0.02 lb (AI) 1.0 b 4.0 b 22.2 c 11.8 b 7.6 c Vydate 2L 3 pts fb Warrior IE" 0.02 lb (AI) 5.1 b 13.1 b 56.2 ab 10.8 b 5.6 c Warrior IE 0.02 lb (AI) fb Vydate" 3 pts 1.2 b 4.8 b 17.7 c 22.7 b 12.0 c Mean no. Thrips/plant 25 Jul 1 Aug Treatment and Rate/acre Untreated Check 24.3 a 1.7 ab TD-2344-02 0.8E 4 fl oz 26.9 a 3.1 ab TD-2344-02 0.8E 5.6 fl oz 19.3 a 3.0 ab Orthene 75S 1.0 lb (AI) 15.8 a 0.8 b Orthene75 S l.Olb(AI) + V-71369 0.86E 50 g (AI) 23.5 a 5.0 a V-71369 0.86E 50 gr (AI) 16.2 a 1.8 ab Warrior IE 0.02 lb (AI) 18.7 a 2.3 ab Vydate 2L 3 pts fb Warrior IE" 0.02 lb (AI) 17.8 a 1.5 ab Warrior IE 0.02 lb (AI) fb Vydate" 3 pt 19.9 a 1.5 ab 'Numbers within a column followed by the same letter are not significantly different (P = 0.05) by SNK. "Vydate/Warrior treatments involved alternating the two insecticides between the two application dates, fb = followed by.
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