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Control of Lepidopterous Larvae on Fall Cabbage, 1993

Control of Lepidopterous Larvae on Fall Cabbage, 1993 Downloaded from https://academic.oup.com/amt/article-abstract/19/1/77/4639259 by DeepDyve user on 02 August 2020 E: VEGETABLE CROPS Arthropod Management Tests, Vol. 19 77 CABBAGE: Brassica oleracea L. 'Bravo' J. Whalen and M, Spellman (27E) Diamondback moth (DBM); Plutella xylostella (L.) Dept. of Entomology Cabbage looper (CL); Trichoplusia ni (Hiibner) University of Delaware Newark, DE 19717-1303 CONTROL OF LEPIDOPTEROUS LARVAE ON FALL CABBAGE, 1993: Cabbage transplants were planted on 16 Aug near Georgetown, DE. Two row plots, 20 ft long on 40 inch centers, were replicated 4 times in a randomized complete block design. Treatments were applied with a C0 pressurized wheelbarrow sprayer delivering 34 gal/acre at 40 psi. Applications were made on 24, 31 Aug; 7, 14, 21, 29 Sep and 5 Oct. Latron B-1956 spreader/sticker (0.06%) was added to all treatments on every spray date. Number of larvae/5 plants was recorded on 10, 16, 23 Sep and 1, 8 Oct. Yield (percent marketable heads) was taken on 8 Oct and defined as cabbage heads with no visible feeding and having at least 2 undamaged wrapper leaves. All treatments provided significantly better DBM control compared to the untreated plot except Dipel 2X and Larvin DF (.40 lb Al/acre and .60 lb Al/acre) on 8 Oct. All treatments provided significantly better CL control and percent marketable heads compared to the untreated plot. No phytotoxicity was observed. Rate lb Marketable " ** Treatment (AI)/acre 16 Sep 23 Sep 1 Oct 8 Oct heads Dipel 2X 1.0 lb." 0.25b 0.50b 0.25b 0.25ab 96.0a Xentari WDG 1.0 lb." 0.25b 0.00b 0.25b 0.00b 95.7a Stalker 2SC 0.15 0.00b 0.25b 0.50b 0.00b 100.0a Larvin 80DF 0.40 0.75b 1.50b 0.25b 0.25ab 88.3a Larvin 80DF 0.60 0.50b 1.00b 0.25b 0.50ab 90.2a Larvin 80DF 0.75 0.25b 1.25b 0.25b 0.00b 91.6a Ambush 2E 0.20 0.00b 0.00b 0.50b 0.00b 99.2a Karate IE 0.02 0.50b 0.25b 0.00b 0.00b 99.1a Fury 1.5EW 0.02 0.25b 0.25b 0.00b 0.00b 96.3a Untreated 4.50a 1.25a 20.3b 2.75a 3.75a Means within column followed by the same letter are not significantly different (P 0.05; Ryan's Q test). "Formulated material/acre. Rate lb Treatment (AI)/acre 10 Sep 16 Sep 23 Sep 1 Oct 8 Oct Dipel 2X 1.0 lb." 0.00b 2.25b 0.25c 0.25b 1.00b Xentari WDG 2.25b 1.0 1b." 0.00b 1.00b l.OObc 0.25b Stalker 2SC 0.15 0.25b 1.00b 0.50c 0.25b 0.75b Larvin 80DF 0.40 0.00b 4.75b 2.75b 0.50b 1.75b Larvin 80DF 0.60 0.00b 3.00b 2.25bc 0.25b 1.25b Larvin 80DF 0.75 0.25b 2.67b 1.00bc 0.25b 1.75b Ambush 2E 0.20 0.00b 0.00b 0.75c 0.00b 0.50b Karate IE 0.02 0.00b 0.75b 0.25c 0.25b 0.50b Fury 1.5EW 0.02 0.00b 1.50b 0.75c 0.00b 0.75b Untreated 3.75a 8.75a 4.50a 3.75a 5.00a Means within column followed by the same letter are not significantly different (P 0.05; Ryan's Q test). "Formulated material/acre. CANTALOUPE: Cucumis melo L„ 'Superstar' W. G. Buhler, G. E. Brust, and R. E. Foster (28E) Striped cucumber beetle (SCB); Acalymma vittatum (F.) Department of Entomology Purdue University W. Lafayette, IN 47907 CONTROL OF STRIPED CUCUMBER BEETLE ON CANTALOUPE IN VINCENNES, IN, 1993: Cantaloupe, variety Superstar', was transplanted at the 3 leaf stage on 28 Apr. Experimental units (plots) consisted of one row 60 ft long, 15 plants per row. Rows were 6 ft apart, lined with black plastic mulch and trickle irrigated. Treatments were arranged in a RCB design, replicated 4 times. Soil insecticides were applied on the day the plastic was laid, 5 days before transplants were set. Foliar sprays were applied on a weekly basis starting 5 May, except for Admire 2F, which was applied on a 2 wk schedule. A total of 8 weekly applications was made. All liquid soil insecticides were applied with a R&D C0 backpack sprayer, operating at 40 psi and delivering 30 gal/acre. Granular soil insecticides were applied via a Gandy box attached to the mulch laying machine. Foliar sprays were applied at 20 gal/acre at a pressure of 30 psi. Plots treated with Furadan 4F at a rate of 1 qt form./acre at planting, followed by alternating weekly sprays of Sevin 80S (1.25 lb/acre) and Thiodan 3EC (1 qt/acre) are designated in the treatment column as Furadan/Sevin/Thiodan. Beetle counts were taken on a per plant basis. Percentage of plants with bacterial wilt was recorded, 25 Jul, by checking for the presence of bacterial ooze. Yields http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Control of Lepidopterous Larvae on Fall Cabbage, 1993

Whalen,, J.; Spellman,, M.
Arthropod Management Tests , Volume 19 (1) – Jan 1, 1994
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Publisher
Oxford University Press
Copyright
© 1994, Entomological Society of America
eISSN
2155-9856
DOI
10.1093/amt/19.1.77
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Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/19/1/77/4639259 by DeepDyve user on 02 August 2020 E: VEGETABLE CROPS Arthropod Management Tests, Vol. 19 77 CABBAGE: Brassica oleracea L. 'Bravo' J. Whalen and M, Spellman (27E) Diamondback moth (DBM); Plutella xylostella (L.) Dept. of Entomology Cabbage looper (CL); Trichoplusia ni (Hiibner) University of Delaware Newark, DE 19717-1303 CONTROL OF LEPIDOPTEROUS LARVAE ON FALL CABBAGE, 1993: Cabbage transplants were planted on 16 Aug near Georgetown, DE. Two row plots, 20 ft long on 40 inch centers, were replicated 4 times in a randomized complete block design. Treatments were applied with a C0 pressurized wheelbarrow sprayer delivering 34 gal/acre at 40 psi. Applications were made on 24, 31 Aug; 7, 14, 21, 29 Sep and 5 Oct. Latron B-1956 spreader/sticker (0.06%) was added to all treatments on every spray date. Number of larvae/5 plants was recorded on 10, 16, 23 Sep and 1, 8 Oct. Yield (percent marketable heads) was taken on 8 Oct and defined as cabbage heads with no visible feeding and having at least 2 undamaged wrapper leaves. All treatments provided significantly better DBM control compared to the untreated plot except Dipel 2X and Larvin DF (.40 lb Al/acre and .60 lb Al/acre) on 8 Oct. All treatments provided significantly better CL control and percent marketable heads compared to the untreated plot. No phytotoxicity was observed. Rate lb Marketable " ** Treatment (AI)/acre 16 Sep 23 Sep 1 Oct 8 Oct heads Dipel 2X 1.0 lb." 0.25b 0.50b 0.25b 0.25ab 96.0a Xentari WDG 1.0 lb." 0.25b 0.00b 0.25b 0.00b 95.7a Stalker 2SC 0.15 0.00b 0.25b 0.50b 0.00b 100.0a Larvin 80DF 0.40 0.75b 1.50b 0.25b 0.25ab 88.3a Larvin 80DF 0.60 0.50b 1.00b 0.25b 0.50ab 90.2a Larvin 80DF 0.75 0.25b 1.25b 0.25b 0.00b 91.6a Ambush 2E 0.20 0.00b 0.00b 0.50b 0.00b 99.2a Karate IE 0.02 0.50b 0.25b 0.00b 0.00b 99.1a Fury 1.5EW 0.02 0.25b 0.25b 0.00b 0.00b 96.3a Untreated 4.50a 1.25a 20.3b 2.75a 3.75a Means within column followed by the same letter are not significantly different (P 0.05; Ryan's Q test). "Formulated material/acre. Rate lb Treatment (AI)/acre 10 Sep 16 Sep 23 Sep 1 Oct 8 Oct Dipel 2X 1.0 lb." 0.00b 2.25b 0.25c 0.25b 1.00b Xentari WDG 2.25b 1.0 1b." 0.00b 1.00b l.OObc 0.25b Stalker 2SC 0.15 0.25b 1.00b 0.50c 0.25b 0.75b Larvin 80DF 0.40 0.00b 4.75b 2.75b 0.50b 1.75b Larvin 80DF 0.60 0.00b 3.00b 2.25bc 0.25b 1.25b Larvin 80DF 0.75 0.25b 2.67b 1.00bc 0.25b 1.75b Ambush 2E 0.20 0.00b 0.00b 0.75c 0.00b 0.50b Karate IE 0.02 0.00b 0.75b 0.25c 0.25b 0.50b Fury 1.5EW 0.02 0.00b 1.50b 0.75c 0.00b 0.75b Untreated 3.75a 8.75a 4.50a 3.75a 5.00a Means within column followed by the same letter are not significantly different (P 0.05; Ryan's Q test). "Formulated material/acre. CANTALOUPE: Cucumis melo L„ 'Superstar' W. G. Buhler, G. E. Brust, and R. E. Foster (28E) Striped cucumber beetle (SCB); Acalymma vittatum (F.) Department of Entomology Purdue University W. Lafayette, IN 47907 CONTROL OF STRIPED CUCUMBER BEETLE ON CANTALOUPE IN VINCENNES, IN, 1993: Cantaloupe, variety Superstar', was transplanted at the 3 leaf stage on 28 Apr. Experimental units (plots) consisted of one row 60 ft long, 15 plants per row. Rows were 6 ft apart, lined with black plastic mulch and trickle irrigated. Treatments were arranged in a RCB design, replicated 4 times. Soil insecticides were applied on the day the plastic was laid, 5 days before transplants were set. Foliar sprays were applied on a weekly basis starting 5 May, except for Admire 2F, which was applied on a 2 wk schedule. A total of 8 weekly applications was made. All liquid soil insecticides were applied with a R&D C0 backpack sprayer, operating at 40 psi and delivering 30 gal/acre. Granular soil insecticides were applied via a Gandy box attached to the mulch laying machine. Foliar sprays were applied at 20 gal/acre at a pressure of 30 psi. Plots treated with Furadan 4F at a rate of 1 qt form./acre at planting, followed by alternating weekly sprays of Sevin 80S (1.25 lb/acre) and Thiodan 3EC (1 qt/acre) are designated in the treatment column as Furadan/Sevin/Thiodan. Beetle counts were taken on a per plant basis. Percentage of plants with bacterial wilt was recorded, 25 Jul, by checking for the presence of bacterial ooze. Yields

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 1994

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