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Control of Lepidopterous Pests, 1993

Control of Lepidopterous Pests, 1993 Downloaded from https://academic.oup.com/amt/article-abstract/22/1/90/4639945 by DeepDyve user on 21 July 2020 90 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROPS CABBAGE: Brassica oleracea capitata L. 'Gourmet' Richard B. Chalfant (HE ) Cabbage looper (CL); Trichoplusia ni (Hiibner) University of Georgia Diamondback moth (DB); Plutella xylostella (L.) Coastal Plain Expt. Stn. P.O. Box 748, Tifton, GA 31794-0748 (912)386-381 6 CONTRO L OF LEPIDOPTEROUS PESTS, 1993: Transplants were set out on 25 Mar (Test 1) and 29 Apr (Test 2) at the UG, Coastal Plain Ex­ periment Station Ponder Farm near Tifton. Plant spacing was 12 inches by 36 inches. Plots were two rows wide and 50 ft long. Treatments were replicated four times in a RCB design. Treatments were applied with a C0 powered backpack sprayer equipped with three Spraying Systems TX12 hollow cone nozzles delivering 50 gpa at a pressure of 50 psi. A surfactant, Valent X-77, was included with all treatments at a concentration of 0.25%. Application dates were 26 Apr, 4, 11, 20, and 28 May. (Test 1) and 4, 11, 18, and 25 Jun (Test 2) Larval counts were made on five plants per plot on 10 and 24 May. and 2 Jun (Test 1), and 12 Jun and 1 Jul (Test 2). On 3 Jun (Test 1) and 1 Jul (Test 2), market quality was determined by scoring 10 heads per plot using a 0- 5 scale as given in the Table. Data were subjected to ANOV A and means were separated by LSD (P = 0.05). In Test 1, damage and market quality were inconsistent with numbers of DB. All treatments except CGA-269941 and Xentari, both at 0.50 lb (AI)/acre, resulted in high percentages of marketable heads by relaxed standards. Only AC 303 630, at 0.15 and 0.20 lb (AI)/acre, AC 303 630 + Pounce mixture, and AC 303 630 followed by Xentari produced high market quality according to strict standards. In Test 2, the CL was the principal defoliator. Only AC 303 630 applied at 0.15 and 0.20 lb (AI)/acre resulted in adequate larval control and high market quality. 1993, Test 1 Market Quality, %* Damage" 3 June Mean no. DB/5 Plants Rate score Treatment lb (AI)/acre 24 May 2 June 3 June Relaxed Strict AC 303 630 24SC 0.10 0.25 0.25 2.40 87.5 62.5 0 0.25 1.80 100.0 90.0 AC 303,630 24SC 0.15 0.25 0.25 1.50 100.0 92.5 AC 303,630 24SC 0.20 AC 303,630 24SC + 0.05 0 0.5 1.80 100.0 82.5 Pounce 3.2E 0.05 AC 303,630 + 0.20 d c 0.25 0.25 1.38 100.0 87.5 Xentari a\t. 0.50 Xentari + 0.50 ' 0.20 0.75 0.25 2.95 72.5 25.0 AC 303,630 alt* 1.25 3.10 70.0 Agree WP 0.50 ' 0.75 2.5 Agree WP 1.10 0.50 2.60 100.0 0.50 27.5 1.25 3.00 90.0 Agree WP 2.00 ' 0.50 17.5 1.50 3.10 75.0 Dipel 2X WP 1.00' 0.50 17.5 2.25 3.32 55.0 CGA-269941 0.50 ' 0.50 15.0 4.00 3.50 97.5 CGA-269941 1.00' 0 2.5 3.00 2.72 97.5 Cutlass WP 1.00' 0.75 30.0 1.75 3.20 80.0 Cutlass WP 2.00 ' 0.25 5.5 1.25 3.15 95.0 Javelin WG 0.50 0.50 17.5 0.25 2.58 Javelin WG 1.00' 1.50 100.0 52.5 Javelin WG + 0.50 ' Larvin 80DF 0.50 2.00 0.50 2.10 100.0 55.0 Javelin WG + 1.00' Larvin 80DF 1.00 1.25 0.50 2.38 92.5 72.5 Larvin 80DF 1.00 2.00 0.25 2.55 100.0 42.5 2.75 92.5 30.0 Pounce 3.2EC 0.10 0.50 0.75 2.90 47.5 Xentari W P 0.50 ' 1.00 0 2.5 0.75 3.50 75.0 Xentari WP 1.00' 0.25 27.5 4.00 3.80 17.5 Untreated Check 5.75 3.0 LSD (P < 0.05) 1.85 3.48 0.64 36.05 30.80 "Score: 0- 2 = no, light, moderate damage to outer leaves; 3-5 = light to severe damage to head and wrapper leaves. *Market quality: relaxed = heads with scores of 0-3 , strict = heads with scores of 0-2. 'Rates given as amount of formulated product. insecticide s applied on alternate schedule. AC 303 630 applied first. ^Insecticides applied on alternate schedule. Xentari applied first. Downloaded from https://academic.oup.com/amt/article-abstract/22/1/90/4639945 by DeepDyve user on 21 July 2020 Arthropod Management Tests, Vol. 22 91 E: VEGETABLE CROPS 1993, Test 2 Mean no./5 Plants Rate b CL Market Quality, % DB Damage" lb (AI)/ Treatment acre 16 June 16 June 1 July 1 July relaxed strict AC 303 630 24FS 0.15 0.00 1.50 0.00 1.48 100 85 AC 303 630 24FS 0.20 0.00 0 0.00 1.30 100 95 Agree WP 1.00' 3.50 2.25 11.00 3.30 65 25 Agree WP 2.0' 1.50 1.75 8.00 4.20 0 0 CGA-269941 WP 0.50 ' 3.75 2.25 10.00 4.02 0 0 CGA-269941 WP 1.00' 2.75 1.25 7.00 3.85 30 0 Cutlass WP 0.85 ' 3.75 1.75 17.00 4.05 5 0 Cutlass WP 1.50' 2.25 1.75 3.00 3.50 45 0 Javelin WG 0.50 ' 2.25 0.50 4.50 3.75 20 0 Javelin WG 1XKX 2.75 1.00 4.00 3.45 90 5 Untreated check 10.25 9.75 25.00 5.00 0 0 LSD (P < 0.05) 2.73 1.01 16.6 2.84 14.4 25.8 "Score: 0- 2 = no, light, moderate damage to outer leaves; 3- 5 = light to severe damage to head and wrapper leaves, *Market quality: relaxed = heads with scores of 0-3 , strict = heads with scores of 0-2. 'Rates given as amount of formulated product. CABBAGE: Brassica oleracea capitata L. 'Rio Verde' Richard B. Chalfant (12E) Cabbage looper (CL); Trichoplusia ni (Hiibner) University of Georgia Diamondback moth (DB); Plutella xylostella (L.) Coastal Plain Expt. Stn. Imported cabbage worm (IC); Artogeia rapae (L) P.O. Box 748, Tifton, GA 31794-0748 (912) 386-3816 CONTRO L OF LEPIDOPTEROUS PESTS, 1994: Transplants were set out on 21 Ma r (Test 1) and 12 Ma y (Test 2) at the UG Coastal Plain Ex­ periment Station Ponder Farm near Tifton. Plant spacing was 12 inches in the row and 36 inches between rows. Plots were two rows wide and 50 ft long. Treatments were replicated four times in a RCB design. Insecticides were applied with a two-row boom equipped with three Spraying Systems TX18 hol­ low cone nozzles per row delivering 50 gpa at a pressure of 100 psi . A surfactant, Valent X-77 was included with all treatments at a concentration of 0.25%. Application dates were 25 Apr, 2, 9, 17, and 25 May (Test 1), and 1, 8, 13, 21 June; 8 and 13 July (Test 2). Larval counts on five plants per plot were made on 29 Apr, 5, 13 May (Test 1); 3, 10, 16, 24 Jun and 12 July (Test 2). On 30 May (Test 1) and 21 July (Test 2), market quality was determined by scoring 10 mature heads per plot using a 0- 5 scale as given in the Table. Data were subjected to ANOV A and means were separated by LSD (P = 0.05). In Test 1, small populations of the DB , C L and IC were present. All insecticidal treatments resulted in high percentages of cabbages marketable by relaxed standards. AC 303 630 applied at 0.10, 1.15 and 0.20, and a mixture of AC 303 630 + Pounce at 0.05 lb(AI)/acre, resulted in nearly 100% mar­ ketability by strict standards. The same four treatments resulted in high market quality according to strict standards in Test 2 as well, where CL was the only defoliator. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Control of Lepidopterous Pests, 1993

Arthropod Management Tests , Volume 22 (1) – Jan 1, 1997

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Oxford University Press
Copyright
© 1997 Entomological Society of America.
eISSN
2155-9856
DOI
10.1093/amt/22.1.90
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Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/22/1/90/4639945 by DeepDyve user on 21 July 2020 90 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROPS CABBAGE: Brassica oleracea capitata L. 'Gourmet' Richard B. Chalfant (HE ) Cabbage looper (CL); Trichoplusia ni (Hiibner) University of Georgia Diamondback moth (DB); Plutella xylostella (L.) Coastal Plain Expt. Stn. P.O. Box 748, Tifton, GA 31794-0748 (912)386-381 6 CONTRO L OF LEPIDOPTEROUS PESTS, 1993: Transplants were set out on 25 Mar (Test 1) and 29 Apr (Test 2) at the UG, Coastal Plain Ex­ periment Station Ponder Farm near Tifton. Plant spacing was 12 inches by 36 inches. Plots were two rows wide and 50 ft long. Treatments were replicated four times in a RCB design. Treatments were applied with a C0 powered backpack sprayer equipped with three Spraying Systems TX12 hollow cone nozzles delivering 50 gpa at a pressure of 50 psi. A surfactant, Valent X-77, was included with all treatments at a concentration of 0.25%. Application dates were 26 Apr, 4, 11, 20, and 28 May. (Test 1) and 4, 11, 18, and 25 Jun (Test 2) Larval counts were made on five plants per plot on 10 and 24 May. and 2 Jun (Test 1), and 12 Jun and 1 Jul (Test 2). On 3 Jun (Test 1) and 1 Jul (Test 2), market quality was determined by scoring 10 heads per plot using a 0- 5 scale as given in the Table. Data were subjected to ANOV A and means were separated by LSD (P = 0.05). In Test 1, damage and market quality were inconsistent with numbers of DB. All treatments except CGA-269941 and Xentari, both at 0.50 lb (AI)/acre, resulted in high percentages of marketable heads by relaxed standards. Only AC 303 630, at 0.15 and 0.20 lb (AI)/acre, AC 303 630 + Pounce mixture, and AC 303 630 followed by Xentari produced high market quality according to strict standards. In Test 2, the CL was the principal defoliator. Only AC 303 630 applied at 0.15 and 0.20 lb (AI)/acre resulted in adequate larval control and high market quality. 1993, Test 1 Market Quality, %* Damage" 3 June Mean no. DB/5 Plants Rate score Treatment lb (AI)/acre 24 May 2 June 3 June Relaxed Strict AC 303 630 24SC 0.10 0.25 0.25 2.40 87.5 62.5 0 0.25 1.80 100.0 90.0 AC 303,630 24SC 0.15 0.25 0.25 1.50 100.0 92.5 AC 303,630 24SC 0.20 AC 303,630 24SC + 0.05 0 0.5 1.80 100.0 82.5 Pounce 3.2E 0.05 AC 303,630 + 0.20 d c 0.25 0.25 1.38 100.0 87.5 Xentari a\t. 0.50 Xentari + 0.50 ' 0.20 0.75 0.25 2.95 72.5 25.0 AC 303,630 alt* 1.25 3.10 70.0 Agree WP 0.50 ' 0.75 2.5 Agree WP 1.10 0.50 2.60 100.0 0.50 27.5 1.25 3.00 90.0 Agree WP 2.00 ' 0.50 17.5 1.50 3.10 75.0 Dipel 2X WP 1.00' 0.50 17.5 2.25 3.32 55.0 CGA-269941 0.50 ' 0.50 15.0 4.00 3.50 97.5 CGA-269941 1.00' 0 2.5 3.00 2.72 97.5 Cutlass WP 1.00' 0.75 30.0 1.75 3.20 80.0 Cutlass WP 2.00 ' 0.25 5.5 1.25 3.15 95.0 Javelin WG 0.50 0.50 17.5 0.25 2.58 Javelin WG 1.00' 1.50 100.0 52.5 Javelin WG + 0.50 ' Larvin 80DF 0.50 2.00 0.50 2.10 100.0 55.0 Javelin WG + 1.00' Larvin 80DF 1.00 1.25 0.50 2.38 92.5 72.5 Larvin 80DF 1.00 2.00 0.25 2.55 100.0 42.5 2.75 92.5 30.0 Pounce 3.2EC 0.10 0.50 0.75 2.90 47.5 Xentari W P 0.50 ' 1.00 0 2.5 0.75 3.50 75.0 Xentari WP 1.00' 0.25 27.5 4.00 3.80 17.5 Untreated Check 5.75 3.0 LSD (P < 0.05) 1.85 3.48 0.64 36.05 30.80 "Score: 0- 2 = no, light, moderate damage to outer leaves; 3-5 = light to severe damage to head and wrapper leaves. *Market quality: relaxed = heads with scores of 0-3 , strict = heads with scores of 0-2. 'Rates given as amount of formulated product. insecticide s applied on alternate schedule. AC 303 630 applied first. ^Insecticides applied on alternate schedule. Xentari applied first. Downloaded from https://academic.oup.com/amt/article-abstract/22/1/90/4639945 by DeepDyve user on 21 July 2020 Arthropod Management Tests, Vol. 22 91 E: VEGETABLE CROPS 1993, Test 2 Mean no./5 Plants Rate b CL Market Quality, % DB Damage" lb (AI)/ Treatment acre 16 June 16 June 1 July 1 July relaxed strict AC 303 630 24FS 0.15 0.00 1.50 0.00 1.48 100 85 AC 303 630 24FS 0.20 0.00 0 0.00 1.30 100 95 Agree WP 1.00' 3.50 2.25 11.00 3.30 65 25 Agree WP 2.0' 1.50 1.75 8.00 4.20 0 0 CGA-269941 WP 0.50 ' 3.75 2.25 10.00 4.02 0 0 CGA-269941 WP 1.00' 2.75 1.25 7.00 3.85 30 0 Cutlass WP 0.85 ' 3.75 1.75 17.00 4.05 5 0 Cutlass WP 1.50' 2.25 1.75 3.00 3.50 45 0 Javelin WG 0.50 ' 2.25 0.50 4.50 3.75 20 0 Javelin WG 1XKX 2.75 1.00 4.00 3.45 90 5 Untreated check 10.25 9.75 25.00 5.00 0 0 LSD (P < 0.05) 2.73 1.01 16.6 2.84 14.4 25.8 "Score: 0- 2 = no, light, moderate damage to outer leaves; 3- 5 = light to severe damage to head and wrapper leaves, *Market quality: relaxed = heads with scores of 0-3 , strict = heads with scores of 0-2. 'Rates given as amount of formulated product. CABBAGE: Brassica oleracea capitata L. 'Rio Verde' Richard B. Chalfant (12E) Cabbage looper (CL); Trichoplusia ni (Hiibner) University of Georgia Diamondback moth (DB); Plutella xylostella (L.) Coastal Plain Expt. Stn. Imported cabbage worm (IC); Artogeia rapae (L) P.O. Box 748, Tifton, GA 31794-0748 (912) 386-3816 CONTRO L OF LEPIDOPTEROUS PESTS, 1994: Transplants were set out on 21 Ma r (Test 1) and 12 Ma y (Test 2) at the UG Coastal Plain Ex­ periment Station Ponder Farm near Tifton. Plant spacing was 12 inches in the row and 36 inches between rows. Plots were two rows wide and 50 ft long. Treatments were replicated four times in a RCB design. Insecticides were applied with a two-row boom equipped with three Spraying Systems TX18 hol­ low cone nozzles per row delivering 50 gpa at a pressure of 100 psi . A surfactant, Valent X-77 was included with all treatments at a concentration of 0.25%. Application dates were 25 Apr, 2, 9, 17, and 25 May (Test 1), and 1, 8, 13, 21 June; 8 and 13 July (Test 2). Larval counts on five plants per plot were made on 29 Apr, 5, 13 May (Test 1); 3, 10, 16, 24 Jun and 12 July (Test 2). On 30 May (Test 1) and 21 July (Test 2), market quality was determined by scoring 10 mature heads per plot using a 0- 5 scale as given in the Table. Data were subjected to ANOV A and means were separated by LSD (P = 0.05). In Test 1, small populations of the DB , C L and IC were present. All insecticidal treatments resulted in high percentages of cabbages marketable by relaxed standards. AC 303 630 applied at 0.10, 1.15 and 0.20, and a mixture of AC 303 630 + Pounce at 0.05 lb(AI)/acre, resulted in nearly 100% mar­ ketability by strict standards. The same four treatments resulted in high market quality according to strict standards in Test 2 as well, where CL was the only defoliator.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 1997

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