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Onion Maggot Control, 1992

Onion Maggot Control, 1992 Downloaded from https://academic.oup.com/amt/article-abstract/19/1/102/4639289 by DeepDyve user on 02 August 2020 102 Arthropod Management Tests, Vol. 19 E: VEGETABLE CROPS Mean number of small CL per 25 plants Mean number of large CL per 25 plants Rate (lbs/acre) 7 Oct 12 Oct 17 Oct 7 Oct 12 Oct 17 Oct Treatment 0.0 ± 0.0 a Xentari 1.0 1.0 0.7 a 0.0 ± 0.0 a 0.0 ± 0.0 a 0.0 ± 0.0 b 0.0 ± 0.0 b Dipel 0.8 ± 0.8 a 0.0 ± 0.0 a 1.0 0.0 0.0 a 0.0 ± 0.0 a 0.0 ± 0.0 b 0.0 ± 0.0 b Agree 0.0 ± 0.0 a 0.0 ± 0.0 a 1.0 0.2 0.2 a 0.0 ± 0.0 a 0.2 ± 0.2 b 0.0 ± 0.0 b Stalker 0.0 ± 0.0 a ± 0.0 a 0.1 0.0 0.0 a 0.0 0.0 ± 0.0 a 0.0 ± 0.0 b 0.0 ± 0.0 b Stalker 0.0 ± 0.0 a ± 0.0 a 0.2 0.2 0.2 a 0.0 0.0 ± 0.0 a 0.0 ± 0.0 b 0.0 ± 0.0 b RH 5992 0.125 0.8 0.8 a 0.0 ± 0.0 a ± 0.0 a 0.0 + 0.0 a 0.0 ± 0.0 b 0.0 + 0.0 b 0.0 0.0 ± 0.0 a Larvin 0.75 0.5 0.5 a ± 0.0 a 0.0 ± 0.0 a 0.0 ± 0.0 b 0.0 ± 0.0 b 0.0 0.2 ± 0.2 a Control 0.0 0.0 a 0.5 ± 0.3 a 0.0 ± 0.0 a 1.3 ± 0.8 a 2.3 ± 0.8 a 0.9 0.6 0 0.8 0.9 1.1 ONIONS: Allium cepa L. 'Golden Cascade' M. Davis, W. Pett, and E. Grafius (58E) Onion maggot; Delia antiqua (Meigen) Department of Entomology Michigan State University East Lansing, MI 48824 ONION MAGGOT CONTROL, 1992: Onions were planted at the Brink Farm near Grant, MI on 11 May. Seeds were planted in single rows with a vee-belt seeder with a 1 inch wide shoe. Plots were 20 ft long and were replicated four times with a randomized complete block arrangement. Treatments consisted of sand pelleted seed except for the conventional seed, which was unpelleted. All pelleted treatments except the pelleted seed control also included Progrow (Vitavax + Thiram) in the pellet. On 9 Jun, 100-plant sections (or total plant stand if less than 100 plants) were marked out in each replicate (block). Total plant stand and numbers of injured plants were recorded on 16, 23, 30 Jun, 7 and 16 Jul and 25 Aug. On 25 Aug all plants were cut open and inspected for onion maggot damage. Percent data were arc sine square root transformed before analysis of variance. Plant stand was never significantly different among treatments on any of the sampling dates, although the two Trigard treatments showed the highest stands during the season and at harvest. Bulb damage observed at harvest was lowest in the Lorsban treatment, followed by the two Trigard treatments. Mean % plant Mean % damage Treatment Rate stand at harvest at harve Trigard pelleted seed 50 g Al/kg seed 62.0 a 5.2 ab Trigard 75 g Al/kg seed 67.9 a 3.8 a pelleted seed Pelleted seed + Lorsban 3.7 oz/1000 row ft 50.0 a 1.0 a Pelleted seed (Progrow only) 37.0 a 9.8 b Pelleted seed control 31.0 a 20.5 c Conventional seed 30.7 a 17.4 c Means within the same column and followed by the same letter are not significantly different (Fisher's protected LSD, P < 0.05). ONIONS: Allium cepa L. 'Golden Cascade' M. Davis, E. Grafius, J. McDaniel, and P. Kolarik (59E) Onion maggot; Delia antiqua (Meigen) Department of Entomology Michigan State University East Lansing, MI 48824 ONION MAGGOT CONTROL, 1993: Onions 'Golden Cascade' were seeded at the Brink Farm near Grant Michigan on 4 May in single rows using a vee-belt seeder with a 1-inch wide shoe. Plots were 15 ft long, replicated five times in a randomized complete block arrangement, 12 inches between rows, with untreated buffer rows between each plot. Plots were seeded at 12 seeds per foot, for a total of 180 seeds per plot. There were four seed treatments with Trigard plus three in-furrow insecticide treatments and associated control treatments. Trigard treatments were: a previously tested pellet formulation containing sand, a new pellet containing diatomaceous earth, and a seed coat held on the seed with a thin film coat. Pelleted seed included the fungicide Progrow. Seed film coat treatment and untreated seed included thiram. Lorsban, Dyfonate, and Admire treatments were applied in furrow at planting with thiram-treated seed. Three weeks post-planting, 100 plant sections in each replicate (or the entire replicate if 100 plants were not present) were marked. The number of damaged plants in each 100 plant section were counted weekly from 8 Jun-8 Jul. Final stand counts were made at the end of the season. Observed onion maggot injury summed for all dates was 29.5 to 44.4% in the controls. Injury was less in Lorsban and Dyfonate treatments than in controls. Observed injury in Trigard treatments was 7.6 to 10.2% and significantly lower than the Lorsban treatment or the controls. All Trigard http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Onion Maggot Control, 1992

Davis,, M.; Pett,, W.; Grafius,, E.
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/19.1.102
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Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/19/1/102/4639289 by DeepDyve user on 02 August 2020 102 Arthropod Management Tests, Vol. 19 E: VEGETABLE CROPS Mean number of small CL per 25 plants Mean number of large CL per 25 plants Rate (lbs/acre) 7 Oct 12 Oct 17 Oct 7 Oct 12 Oct 17 Oct Treatment 0.0 ± 0.0 a Xentari 1.0 1.0 0.7 a 0.0 ± 0.0 a 0.0 ± 0.0 a 0.0 ± 0.0 b 0.0 ± 0.0 b Dipel 0.8 ± 0.8 a 0.0 ± 0.0 a 1.0 0.0 0.0 a 0.0 ± 0.0 a 0.0 ± 0.0 b 0.0 ± 0.0 b Agree 0.0 ± 0.0 a 0.0 ± 0.0 a 1.0 0.2 0.2 a 0.0 ± 0.0 a 0.2 ± 0.2 b 0.0 ± 0.0 b Stalker 0.0 ± 0.0 a ± 0.0 a 0.1 0.0 0.0 a 0.0 0.0 ± 0.0 a 0.0 ± 0.0 b 0.0 ± 0.0 b Stalker 0.0 ± 0.0 a ± 0.0 a 0.2 0.2 0.2 a 0.0 0.0 ± 0.0 a 0.0 ± 0.0 b 0.0 ± 0.0 b RH 5992 0.125 0.8 0.8 a 0.0 ± 0.0 a ± 0.0 a 0.0 + 0.0 a 0.0 ± 0.0 b 0.0 + 0.0 b 0.0 0.0 ± 0.0 a Larvin 0.75 0.5 0.5 a ± 0.0 a 0.0 ± 0.0 a 0.0 ± 0.0 b 0.0 ± 0.0 b 0.0 0.2 ± 0.2 a Control 0.0 0.0 a 0.5 ± 0.3 a 0.0 ± 0.0 a 1.3 ± 0.8 a 2.3 ± 0.8 a 0.9 0.6 0 0.8 0.9 1.1 ONIONS: Allium cepa L. 'Golden Cascade' M. Davis, W. Pett, and E. Grafius (58E) Onion maggot; Delia antiqua (Meigen) Department of Entomology Michigan State University East Lansing, MI 48824 ONION MAGGOT CONTROL, 1992: Onions were planted at the Brink Farm near Grant, MI on 11 May. Seeds were planted in single rows with a vee-belt seeder with a 1 inch wide shoe. Plots were 20 ft long and were replicated four times with a randomized complete block arrangement. Treatments consisted of sand pelleted seed except for the conventional seed, which was unpelleted. All pelleted treatments except the pelleted seed control also included Progrow (Vitavax + Thiram) in the pellet. On 9 Jun, 100-plant sections (or total plant stand if less than 100 plants) were marked out in each replicate (block). Total plant stand and numbers of injured plants were recorded on 16, 23, 30 Jun, 7 and 16 Jul and 25 Aug. On 25 Aug all plants were cut open and inspected for onion maggot damage. Percent data were arc sine square root transformed before analysis of variance. Plant stand was never significantly different among treatments on any of the sampling dates, although the two Trigard treatments showed the highest stands during the season and at harvest. Bulb damage observed at harvest was lowest in the Lorsban treatment, followed by the two Trigard treatments. Mean % plant Mean % damage Treatment Rate stand at harvest at harve Trigard pelleted seed 50 g Al/kg seed 62.0 a 5.2 ab Trigard 75 g Al/kg seed 67.9 a 3.8 a pelleted seed Pelleted seed + Lorsban 3.7 oz/1000 row ft 50.0 a 1.0 a Pelleted seed (Progrow only) 37.0 a 9.8 b Pelleted seed control 31.0 a 20.5 c Conventional seed 30.7 a 17.4 c Means within the same column and followed by the same letter are not significantly different (Fisher's protected LSD, P < 0.05). ONIONS: Allium cepa L. 'Golden Cascade' M. Davis, E. Grafius, J. McDaniel, and P. Kolarik (59E) Onion maggot; Delia antiqua (Meigen) Department of Entomology Michigan State University East Lansing, MI 48824 ONION MAGGOT CONTROL, 1993: Onions 'Golden Cascade' were seeded at the Brink Farm near Grant Michigan on 4 May in single rows using a vee-belt seeder with a 1-inch wide shoe. Plots were 15 ft long, replicated five times in a randomized complete block arrangement, 12 inches between rows, with untreated buffer rows between each plot. Plots were seeded at 12 seeds per foot, for a total of 180 seeds per plot. There were four seed treatments with Trigard plus three in-furrow insecticide treatments and associated control treatments. Trigard treatments were: a previously tested pellet formulation containing sand, a new pellet containing diatomaceous earth, and a seed coat held on the seed with a thin film coat. Pelleted seed included the fungicide Progrow. Seed film coat treatment and untreated seed included thiram. Lorsban, Dyfonate, and Admire treatments were applied in furrow at planting with thiram-treated seed. Three weeks post-planting, 100 plant sections in each replicate (or the entire replicate if 100 plants were not present) were marked. The number of damaged plants in each 100 plant section were counted weekly from 8 Jun-8 Jul. Final stand counts were made at the end of the season. Observed onion maggot injury summed for all dates was 29.5 to 44.4% in the controls. Injury was less in Lorsban and Dyfonate treatments than in controls. Observed injury in Trigard treatments was 7.6 to 10.2% and significantly lower than the Lorsban treatment or the controls. All Trigard

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 1994

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