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Seedcorn Maggot and Wireworm Control with Seed Treatments, 1996

Seedcorn Maggot and Wireworm Control with Seed Treatments, 1996 Downloaded from https://academic.oup.com/amt/article-abstract/22/1/84/4639911 by DeepDyve user on 21 July 2020 84 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROPS BEAN: Phaseolus vulgaris L. 'US-1140' Robert L. Stoltz (3E) Seedcom maggot (SCM); Delia platura (Meigen) Nancy A. Matteson Sugarbeet wireworm (SBW); Limonius californicus (Mannerheim) University of Idaho Twin Falls R & E Center Twin Falls, ID 83301 (208) 736-3600 SEEDCORN MAGGOT AND WIREWORM CONTROL WITH SEED TREATMENTS, 1996: Experimental plots were established on the UI Research and Extension Center, Kimberly, ID. Beans were planted 31 May and furrow irrigated. The soil type was Portneuf silt loam that had been in Timothy grass seed production 3 yr previous to rotation into beans. Three treatments and one untreated check plot were replicated four times in a RCB de­ sign. Each plot was 8 rows by 25 ft long. Seed was obtained from the UI Foundation Seed stock and treated with the compounds used in this study prior to planting. Damage was evaluated by destructively sampling the center 10 ft of rows 2, 3, 6 and 7. One sample row was sampled per wk by removal of the seed by hand and then examining for characteristic damage by SCM and wireworm WW. Number of seeds or seedlings damaged by each insect was recorded along with the total number of seed or seedlings examined to calculate percent damage. Stand counts were also taken at these times. A significant reduction in SCM damage relative to the untreated check was observed 26 days after planting with the Lorsban treatment. No signif­ icant reduction in SCM or W W damage was observed with either GUS treatment. There were, initially, differences in stand count between treatments. These might be attributed to the very poor condition of the planting bed due to the high amount of organic matter remaining from the previous grass crop. There were no significant differences between treatments in harvest weights which were highly correlated to the 26 Jun stand counts. Stand Count Rate Jun 6 Jun 13 Jun 20 Jun 26 Treatment/ formulation (oz (AI)/cwt) Row 2 Row 3 (10ftrows4&5 ) 10 ft rows 4&5) 69.75b 75.75a Untreated Check 45.25a 82.25a 54.50a 38.25a 70.75a GUSLS01 5 0.5 77.00a GUS LS014 1.0 68.50b 44.00a 71.25a 79.25a Lorsban 2.0 53.75a 39.50a 82.25a 84.50a • total damage by SCM + WW Treatment/ Rate Jun 6 Jun 13 Jun 20 Jun 26 formulation (oz (AI)/cwt) Row 2 Row 3 Row 6 Row 7 Untreated Check 0 14.68a 16.92a 18.30a GUSLS01 5 0.5 0 3.08a 20.00a 14.75a GUS LS014 1.0 0 8.34a 12.45a 15.60a Lorsban 2.0 0 10.84a 6.89a 5.77a % damage by SCM only Treatment/ Rate Jun 6 Jun 13 Jun 20 Jun 26 formulation (oz (AI)/cwt) Row 2 Row 3 Row 6 Row 7 Untreated Check 0 14.18a 15.63a 17.55b GUS LS015 0.5 0 3.03a 18.72a 14.32ab GUS LS014 1.0 0 8.34a 11.02a 10.62ab Lorsban 2.0 0 9.40a 6.49a 3.85a Harvest weight (g) Treatment/ Rate Aug 22 formulation (oz (AI)/cwt) Row 2 Untreated Check 600.1a GUS LS015 558.1a 0.5 GUS LS014 571.5a 1.0 Lorsban 2.0 593.2a Means within a column followed by the same letter are not significantly different (P = 0.05; Student-Newman-Keuls). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Seedcorn Maggot and Wireworm Control with Seed Treatments, 1996

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Publisher
Oxford University Press
Copyright
© 1997 Entomological Society of America.
eISSN
2155-9856
DOI
10.1093/amt/22.1.84
Publisher site
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Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/22/1/84/4639911 by DeepDyve user on 21 July 2020 84 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROPS BEAN: Phaseolus vulgaris L. 'US-1140' Robert L. Stoltz (3E) Seedcom maggot (SCM); Delia platura (Meigen) Nancy A. Matteson Sugarbeet wireworm (SBW); Limonius californicus (Mannerheim) University of Idaho Twin Falls R & E Center Twin Falls, ID 83301 (208) 736-3600 SEEDCORN MAGGOT AND WIREWORM CONTROL WITH SEED TREATMENTS, 1996: Experimental plots were established on the UI Research and Extension Center, Kimberly, ID. Beans were planted 31 May and furrow irrigated. The soil type was Portneuf silt loam that had been in Timothy grass seed production 3 yr previous to rotation into beans. Three treatments and one untreated check plot were replicated four times in a RCB de­ sign. Each plot was 8 rows by 25 ft long. Seed was obtained from the UI Foundation Seed stock and treated with the compounds used in this study prior to planting. Damage was evaluated by destructively sampling the center 10 ft of rows 2, 3, 6 and 7. One sample row was sampled per wk by removal of the seed by hand and then examining for characteristic damage by SCM and wireworm WW. Number of seeds or seedlings damaged by each insect was recorded along with the total number of seed or seedlings examined to calculate percent damage. Stand counts were also taken at these times. A significant reduction in SCM damage relative to the untreated check was observed 26 days after planting with the Lorsban treatment. No signif­ icant reduction in SCM or W W damage was observed with either GUS treatment. There were, initially, differences in stand count between treatments. These might be attributed to the very poor condition of the planting bed due to the high amount of organic matter remaining from the previous grass crop. There were no significant differences between treatments in harvest weights which were highly correlated to the 26 Jun stand counts. Stand Count Rate Jun 6 Jun 13 Jun 20 Jun 26 Treatment/ formulation (oz (AI)/cwt) Row 2 Row 3 (10ftrows4&5 ) 10 ft rows 4&5) 69.75b 75.75a Untreated Check 45.25a 82.25a 54.50a 38.25a 70.75a GUSLS01 5 0.5 77.00a GUS LS014 1.0 68.50b 44.00a 71.25a 79.25a Lorsban 2.0 53.75a 39.50a 82.25a 84.50a • total damage by SCM + WW Treatment/ Rate Jun 6 Jun 13 Jun 20 Jun 26 formulation (oz (AI)/cwt) Row 2 Row 3 Row 6 Row 7 Untreated Check 0 14.68a 16.92a 18.30a GUSLS01 5 0.5 0 3.08a 20.00a 14.75a GUS LS014 1.0 0 8.34a 12.45a 15.60a Lorsban 2.0 0 10.84a 6.89a 5.77a % damage by SCM only Treatment/ Rate Jun 6 Jun 13 Jun 20 Jun 26 formulation (oz (AI)/cwt) Row 2 Row 3 Row 6 Row 7 Untreated Check 0 14.18a 15.63a 17.55b GUS LS015 0.5 0 3.03a 18.72a 14.32ab GUS LS014 1.0 0 8.34a 11.02a 10.62ab Lorsban 2.0 0 9.40a 6.49a 3.85a Harvest weight (g) Treatment/ Rate Aug 22 formulation (oz (AI)/cwt) Row 2 Untreated Check 600.1a GUS LS015 558.1a 0.5 GUS LS014 571.5a 1.0 Lorsban 2.0 593.2a Means within a column followed by the same letter are not significantly different (P = 0.05; Student-Newman-Keuls).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 1997

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