Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Control of Thrips Tabaci on Cabbage, 1995

Control of Thrips Tabaci on Cabbage, 1995 Downloaded from https://academic.oup.com/amt/article-abstract/21/1/98/4640177 by DeepDyve user on 02 August 2020 98 Arthropod Management Tests, Vol. 21 E: VEGETABLE CROPS damage. The damage ratings (intensity of injury) were made on a scale of 0 (no damage) to 4 (severely injured) on similarly positioned leaves on 4 different plants per replication. In the evaluations of flea beetle numbers, all treatments had significantly fewer flea beetles compared to the control with the exceptions of Cygon at 0.5 Ib.Al/acre, Admire at 16 oz./acre and Provado at 3.75 oz./acre which had significantly more flea beetles compared to the control. Between treatments, all treatments had significantly fewer flea beetles compared to Admire and Provado and Provado had significantly fewer flea beetles compared to Admire. For damage ratings, Admire had significantly less damage while having significantly more flea beetles. No phytotoxicity was observed in any of the treatments. Mean no. flea beetles per Treatment Rate/acre 3 plants. Warrior 1 EC 0.015 lb.AI 0.00 0.00 Metasystox R 2 EC 3 pt. Ammo 2 EC 0.08 lb.AI 0.00 Asana XL 0.66 EC 0.05 lb.AI 0.00 Ambush 2 EC 0.10 lb.AI 0.25 Mustang 1.5 EW 0.0375 lb.AI 2.25 Orthene 75 S 0.50 lb.AI 2.75 Cygon 4 EC 0.50 lb.AI 4.00 Control 14.00 Provado 1.6 F 0.50 lb.AI 32.00 Admire 2 F 16 oz 52.00 LSD (P = 0.05) 10.69 Mean damage rating per Treatment Rate/acre 4 plants. Admire 2 F 16 oz 0.95 Control 3.08 LSD (P = 0.05) 0.40 CABBAGE: Brassica oleracea capitata (L.) 'Atria' A. M. Shelton, W. T. Wilsey (20Ei Onion thrips; Thrips tabaci Lindeman Department of Entomology NYS Agric. Expt. Station Geneva, NY 14456 (315) 787-2352 CONTROL OF THRIPS TABACI ON CABBAGE, 1995: Cabbage was transplanted on 13 Jun at the Vegetable Crops Research Farm near Geneva, NY. Plots consisted of two 10-ft rows on 36-inch centers with 18-inch plant spacing. Treatments were replicated 4 times in an RCB design. A backpack sprayer with a one-row boom, having 3 nozzles per row with HC 12 hollow cone tips, and delivering 30 gal/acre at 40 psi and 2 mph, was used to apply weekly applications of each treatment. Javelin at 1.0 lb/acre was added to Admire, Cygon and the check treatments to control Lepidoptera and insure readable plants at harvest. Bond sticker-spreader was applied at 0.1 % v/v with all treatments. Admire was applied on only 7 Jul. Metasystox R was applied only on 6, 13 and 20 Sept. Other treatments were applied on 26 Jul, 2, 9, 16, 24, 30 Aug and 6, 13, 20, 27 Sept and 4, 11 Oct. Harvesi evaluations for thrips were made on 19 Oct. Evaluations for thrips damage were made by randomly selecting 2 mature heads per plot, cutting them in half along the core, and peeling back 10 layers. Each layer was assessed for the presence of thrips injury. The overall damage rating (intensity of injury on each leaf plus the number of layers injured) was also made on a scale of 0 (no damage) to 4 (each of the 10 leaves severely injured). Data were analyzed by a two-way ANOVA. For analysis of damage ratings we used the average number of layers per two plants in a replicate, transformed this to a rank, and analyzed ranks. For layers injured, we used the average number of layers per two plants in a replicate and then analyzed these averages No treatments had significantly fewer layers damaged compared to the control. Between treatments, Metasystox R at 3 pt./acre and Mustang at 0.0375 Ib.Al/acre had significantly fewer layers damaged than Ammo at 0.08 Ib.Al/acre, Ambush at 0.1 Ib.Al/acre, Cygon at 0.5 Ib.Al/acre, or Asana at 0.05 Ib.Al/acre. Only Metasystox R at 3 pt./acre and Mustang at 0.0375 Ib.Al/acre had a significantly lower damage ranking compared to the control. Between treatments, Metasystox R and Mustang had significantly lower damage rankings than Ammo at 0.08 Ib.Al/acre, Ambush at 0.1 Ib.Al/acre, Cygon at 0.5 Ib.Al/acre, or Asana at 0.05 Ib.Al/acre. No phytotoxicity was observed in any of the treatments. Treatment Rate/acre No. layers injured Damage Rat Metasystox R 2 EC 3 pt. 0.75 2.25 Mustang 1.5 EW 0.0375 lb.AI 0.88 2.63 Orthene 75 SP 0.50 lb.AI 2.50 6.13 Admire 2 F 16 oz. 2.50 5.25 Warrior 1 EC 0.015 lb.AI 2.63 5.13 Continued Downloaded from https://academic.oup.com/amt/article-abstract/21/1/98/4640177 by DeepDyve user on 02 August 2020 E: VEGETABLE CROPS Arthropod Management Tests, Vol. 21 99 Treatment Rate/acre No. layers i Damage Rating (rank) Provado 1.6 F 0.50 lb.AI 2.88 6.38 Control 3.00 7.00 Ammo 2 EC 0.08 lb.AI 3.63 7.13 Ambush 2 EC 0.10 lb.AI 3.75 7.13 8.00 Asana XL 0.66 EC 0.05 lb.AI 4.13 9.00 Cygon 4 EC 0.50 lb.AI 4.50 LSD (P = 0.05) 4.22 2.73 CABBAGE: Brassica oleracea var capitate L. 'Gourmet' K. A. Sorensen and C. Wade Holloway (2 IE ) Cabbage looper (CL); Trichoplusia ni (Hiibner) Department of Entomology Diamondback moth (DBM); Plutella xylostella (L.) North Carolina State University Raleigh, NC 27695-7626 LEPIDOPTEROUS LARVAE CONTROL WITH INSECTICIDES, PASQUOTANK CO., N.C., 1995: Gourmet' cabbage was direct seeded in early Mar near Weeksville, NC. Single row plots 10 ft. long on 42 inch centers were replicated 4 times in a RCB design. Alleys of 5 ft. were used between replicates. Treatments were applied with a C0 pressurized backpack sprayer using a single hollow cone nozzle (18X) operating at 60 psi to deliver 54.5 gal/acre. Applications with Triton AG-98 (spreader) were made with all treatments 2, 9, 16 and 23 May. Visual estimates of foliar damage and insect counts were made 9, 16, 23 and 30 May. No CL were present on 9 and 16 May. Water pan traps with pheromones were used to monitor the number of adult DBM in the area. Although the number of adults captured in the traps was low to moderate, the larvae counts were extremely low at the beginning and increased to heavy as the season progressed. CL pressure was low and remained low throughout the test. Significant differences were found in the numbers of DBM on 30 May with all treatments but Able 50WP at 1 lb/ha, having fewer DBM larvae than the untreated check. Mattch 1EC gave the best larval control throughout the season. No phytotoxicity was observed in the test. Mean no DBM/3 plants Amt. Treatment 9 May 16 May 23 May 30 May form/acre Able 50WP 0.5 lb/ha 27.75 a 11.25 a 0.50 2.25 16.50 a 15.50 a Able 50WP 1.0 lb/ha 0.25 2.00 Mattch 1EC 2.0 qt 4.50 b 0.50 c 0.00 0.50 CGA215944 50WP 50 g/ha 22.00 a 12.50 a 0.50 4.75 17150 a 13.50 a CGA215944 50WP 100 g/ha 0.75 3.00 CGA215944 50WP 200 g/ha 15.75 ab 11.25 ab 0.50 2.25 6.75 b 5.75 be Dibrom 8EC 1 pt 1.25 0.75 Untreated Check 0.00 2.75 26.50 a 15.50 a LSD 12.10 6.92 NS NS Means within a column followed by the same letter are not significantly different (P = 0.05; LSD). DBM and CL Mean no CL/3 Plants Mean Damage Rating" Amt. Treatment form/acre 23 May 30 May 23 May 9 May 16 May 30 May Able 50WP 0.5 lb/ha 0.00 2.25 2.00 2.50 2.75 a 0.25 Able 50WP 1.0 lb/ha 1.75 0.50 0.00 2.00 1.25 1.50 b Mattch IE 2.0 qt 0.00 2.00 1.75 1.75 1.25 b 0.00 CGA215944 50WP 50 g/ha 0.50 2.00 2.00 2.00 2.50 a 0.00 CGA215944 50WP 100 g/ha 0.00 0.25 1.75 1.25 1.75 2.00 a CGA215944 50WP 200 g/ha 0.00 2.25 1.50 2.25 2.00 ab 0.50 Dibrom 8EC 1 pt 0.25 2.00 1.50 1.75 b 0.25 1.75 Untreated Check 0.25 0.75 2.25 1.75 2.00 2.50 a LSD NS NS NS NS 0.83 NS Means within a column followed by the same letter are not significantly different (P 0.05; LSD). •No CL present on 9 and 16 May. 'Damage rating 1-10; 1 = 10%; 10 = 100% defoliation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Control of Thrips Tabaci on Cabbage, 1995

Arthropod Management Tests , Volume 21 (1) – Jan 1, 1996

Loading next page...
 
/lp/oxford-university-press/control-of-thrips-tabaci-on-cabbage-1995-hm5R4wDHyB

References (0)

References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.

Publisher
Oxford University Press
Copyright
© Entomological Society of America.
eISSN
2155-9856
DOI
10.1093/amt/21.1.98
Publisher site
See Article on Publisher Site

Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/21/1/98/4640177 by DeepDyve user on 02 August 2020 98 Arthropod Management Tests, Vol. 21 E: VEGETABLE CROPS damage. The damage ratings (intensity of injury) were made on a scale of 0 (no damage) to 4 (severely injured) on similarly positioned leaves on 4 different plants per replication. In the evaluations of flea beetle numbers, all treatments had significantly fewer flea beetles compared to the control with the exceptions of Cygon at 0.5 Ib.Al/acre, Admire at 16 oz./acre and Provado at 3.75 oz./acre which had significantly more flea beetles compared to the control. Between treatments, all treatments had significantly fewer flea beetles compared to Admire and Provado and Provado had significantly fewer flea beetles compared to Admire. For damage ratings, Admire had significantly less damage while having significantly more flea beetles. No phytotoxicity was observed in any of the treatments. Mean no. flea beetles per Treatment Rate/acre 3 plants. Warrior 1 EC 0.015 lb.AI 0.00 0.00 Metasystox R 2 EC 3 pt. Ammo 2 EC 0.08 lb.AI 0.00 Asana XL 0.66 EC 0.05 lb.AI 0.00 Ambush 2 EC 0.10 lb.AI 0.25 Mustang 1.5 EW 0.0375 lb.AI 2.25 Orthene 75 S 0.50 lb.AI 2.75 Cygon 4 EC 0.50 lb.AI 4.00 Control 14.00 Provado 1.6 F 0.50 lb.AI 32.00 Admire 2 F 16 oz 52.00 LSD (P = 0.05) 10.69 Mean damage rating per Treatment Rate/acre 4 plants. Admire 2 F 16 oz 0.95 Control 3.08 LSD (P = 0.05) 0.40 CABBAGE: Brassica oleracea capitata (L.) 'Atria' A. M. Shelton, W. T. Wilsey (20Ei Onion thrips; Thrips tabaci Lindeman Department of Entomology NYS Agric. Expt. Station Geneva, NY 14456 (315) 787-2352 CONTROL OF THRIPS TABACI ON CABBAGE, 1995: Cabbage was transplanted on 13 Jun at the Vegetable Crops Research Farm near Geneva, NY. Plots consisted of two 10-ft rows on 36-inch centers with 18-inch plant spacing. Treatments were replicated 4 times in an RCB design. A backpack sprayer with a one-row boom, having 3 nozzles per row with HC 12 hollow cone tips, and delivering 30 gal/acre at 40 psi and 2 mph, was used to apply weekly applications of each treatment. Javelin at 1.0 lb/acre was added to Admire, Cygon and the check treatments to control Lepidoptera and insure readable plants at harvest. Bond sticker-spreader was applied at 0.1 % v/v with all treatments. Admire was applied on only 7 Jul. Metasystox R was applied only on 6, 13 and 20 Sept. Other treatments were applied on 26 Jul, 2, 9, 16, 24, 30 Aug and 6, 13, 20, 27 Sept and 4, 11 Oct. Harvesi evaluations for thrips were made on 19 Oct. Evaluations for thrips damage were made by randomly selecting 2 mature heads per plot, cutting them in half along the core, and peeling back 10 layers. Each layer was assessed for the presence of thrips injury. The overall damage rating (intensity of injury on each leaf plus the number of layers injured) was also made on a scale of 0 (no damage) to 4 (each of the 10 leaves severely injured). Data were analyzed by a two-way ANOVA. For analysis of damage ratings we used the average number of layers per two plants in a replicate, transformed this to a rank, and analyzed ranks. For layers injured, we used the average number of layers per two plants in a replicate and then analyzed these averages No treatments had significantly fewer layers damaged compared to the control. Between treatments, Metasystox R at 3 pt./acre and Mustang at 0.0375 Ib.Al/acre had significantly fewer layers damaged than Ammo at 0.08 Ib.Al/acre, Ambush at 0.1 Ib.Al/acre, Cygon at 0.5 Ib.Al/acre, or Asana at 0.05 Ib.Al/acre. Only Metasystox R at 3 pt./acre and Mustang at 0.0375 Ib.Al/acre had a significantly lower damage ranking compared to the control. Between treatments, Metasystox R and Mustang had significantly lower damage rankings than Ammo at 0.08 Ib.Al/acre, Ambush at 0.1 Ib.Al/acre, Cygon at 0.5 Ib.Al/acre, or Asana at 0.05 Ib.Al/acre. No phytotoxicity was observed in any of the treatments. Treatment Rate/acre No. layers injured Damage Rat Metasystox R 2 EC 3 pt. 0.75 2.25 Mustang 1.5 EW 0.0375 lb.AI 0.88 2.63 Orthene 75 SP 0.50 lb.AI 2.50 6.13 Admire 2 F 16 oz. 2.50 5.25 Warrior 1 EC 0.015 lb.AI 2.63 5.13 Continued Downloaded from https://academic.oup.com/amt/article-abstract/21/1/98/4640177 by DeepDyve user on 02 August 2020 E: VEGETABLE CROPS Arthropod Management Tests, Vol. 21 99 Treatment Rate/acre No. layers i Damage Rating (rank) Provado 1.6 F 0.50 lb.AI 2.88 6.38 Control 3.00 7.00 Ammo 2 EC 0.08 lb.AI 3.63 7.13 Ambush 2 EC 0.10 lb.AI 3.75 7.13 8.00 Asana XL 0.66 EC 0.05 lb.AI 4.13 9.00 Cygon 4 EC 0.50 lb.AI 4.50 LSD (P = 0.05) 4.22 2.73 CABBAGE: Brassica oleracea var capitate L. 'Gourmet' K. A. Sorensen and C. Wade Holloway (2 IE ) Cabbage looper (CL); Trichoplusia ni (Hiibner) Department of Entomology Diamondback moth (DBM); Plutella xylostella (L.) North Carolina State University Raleigh, NC 27695-7626 LEPIDOPTEROUS LARVAE CONTROL WITH INSECTICIDES, PASQUOTANK CO., N.C., 1995: Gourmet' cabbage was direct seeded in early Mar near Weeksville, NC. Single row plots 10 ft. long on 42 inch centers were replicated 4 times in a RCB design. Alleys of 5 ft. were used between replicates. Treatments were applied with a C0 pressurized backpack sprayer using a single hollow cone nozzle (18X) operating at 60 psi to deliver 54.5 gal/acre. Applications with Triton AG-98 (spreader) were made with all treatments 2, 9, 16 and 23 May. Visual estimates of foliar damage and insect counts were made 9, 16, 23 and 30 May. No CL were present on 9 and 16 May. Water pan traps with pheromones were used to monitor the number of adult DBM in the area. Although the number of adults captured in the traps was low to moderate, the larvae counts were extremely low at the beginning and increased to heavy as the season progressed. CL pressure was low and remained low throughout the test. Significant differences were found in the numbers of DBM on 30 May with all treatments but Able 50WP at 1 lb/ha, having fewer DBM larvae than the untreated check. Mattch 1EC gave the best larval control throughout the season. No phytotoxicity was observed in the test. Mean no DBM/3 plants Amt. Treatment 9 May 16 May 23 May 30 May form/acre Able 50WP 0.5 lb/ha 27.75 a 11.25 a 0.50 2.25 16.50 a 15.50 a Able 50WP 1.0 lb/ha 0.25 2.00 Mattch 1EC 2.0 qt 4.50 b 0.50 c 0.00 0.50 CGA215944 50WP 50 g/ha 22.00 a 12.50 a 0.50 4.75 17150 a 13.50 a CGA215944 50WP 100 g/ha 0.75 3.00 CGA215944 50WP 200 g/ha 15.75 ab 11.25 ab 0.50 2.25 6.75 b 5.75 be Dibrom 8EC 1 pt 1.25 0.75 Untreated Check 0.00 2.75 26.50 a 15.50 a LSD 12.10 6.92 NS NS Means within a column followed by the same letter are not significantly different (P = 0.05; LSD). DBM and CL Mean no CL/3 Plants Mean Damage Rating" Amt. Treatment form/acre 23 May 30 May 23 May 9 May 16 May 30 May Able 50WP 0.5 lb/ha 0.00 2.25 2.00 2.50 2.75 a 0.25 Able 50WP 1.0 lb/ha 1.75 0.50 0.00 2.00 1.25 1.50 b Mattch IE 2.0 qt 0.00 2.00 1.75 1.75 1.25 b 0.00 CGA215944 50WP 50 g/ha 0.50 2.00 2.00 2.00 2.50 a 0.00 CGA215944 50WP 100 g/ha 0.00 0.25 1.75 1.25 1.75 2.00 a CGA215944 50WP 200 g/ha 0.00 2.25 1.50 2.25 2.00 ab 0.50 Dibrom 8EC 1 pt 0.25 2.00 1.50 1.75 b 0.25 1.75 Untreated Check 0.25 0.75 2.25 1.75 2.00 2.50 a LSD NS NS NS NS 0.83 NS Means within a column followed by the same letter are not significantly different (P 0.05; LSD). •No CL present on 9 and 16 May. 'Damage rating 1-10; 1 = 10%; 10 = 100% defoliation.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 1996

There are no references for this article.