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EFFICACY OF TWO GEL BAITS FOR CONTROL OF THE BROWN-BANDED COCKROACH, 2004

EFFICACY OF TWO GEL BAITS FOR CONTROL OF THE BROWN-BANDED COCKROACH, 2004 (L3) BIOASSAY: Urban EFFICACY OF TWO GEL BAITS FOR CONTROL OF THE BROWN-BANDED COCKROACH, 2004 Changlu Wang Purdue University Center for Urban and Industrial Pest Management, Department of Entomology 901 W. State St. West Lafayette, IN 47907, USA Phone: (765) 494-7740 Fax: (765) 496-2295 E-mail: cwang@entm.purdue.edu Gary W. Bennett Brown-banded cockroach (BBC): Supella longipalpa (F.) This experiment was conducted in the laboratory to evaluate two cockroach gel baits for the control of a laboratory strain of BBC. The two gel bait products were Maxforce FC and Maxforce FC Select. The BBC were maintained on a mixed diet (peanut butter, mixed fruit jelly, rodent chow, and potato flakes) prior to the experiment. Twenty mid-stage (second to fourth instar) BBC nymphs were placed into each plastic box container (18.7 × 13.3 × 9.5 cm) 1 day before bait introduction. The inner upper portion of the boxes was lightly greased with a mixture of petroleum jelly and mineral oil (2:3) to prevent escaping. Each box contained a cotton-plugged water vial and a 10 × 10 cm cardboard “tent” as a harborage. Approximately 0.4 g of gel bait in a 0.7 ml centrifuge vial was placed in each box after 1 day acclimation period. Each box also received a piece of rodent chow as alternative food. The control box was provided with rodent chow only. Each treatment was applied to three boxes. Cockroach mortality was recorded every 1 – 2 days until 14 days. Weight of the bait vials was measured immediately before exposure to the cockroaches and at 6 DAT. Three vials of bait were placed in the same room for estimation of water loss. Moribund cockroaches (defined by an inability to walk) were considered dead in this experiment. The experiment units were kept in a walk-in environmental chamber at 26 C, 60% RH, and 12:12 h [L:D] photoperiod. Cockroach counts were logarithmic transformed and analyzed using a mixed-effects model repeated measures approach. The bait consumption was analyzed using ANOVA. Maxforce FC Select provided significant higher mortality than the untreated check from 5 DAT. It was significantly more effective than Maxforce FC in controlling BBC (P < 0.001). At 14 DAT, the mean mortality from Maxforce FC Select (after corrected by Abbott’s formula) was 54.8%. Mean consumption per experiment box at 6 DAT was 0.113 ± 0.003 g. Maxforce FC did not cause significantly higher mortality than the untreated check. The mean consumption of Maxforce FC per experiment box at 6 DAT (0.005 ± 0.003 g) was significantly less than that of the Maxforce FC Select bait (0.020 ± 0.004 g) ( P = 0.02), indicating that Maxforce FC was less palatable to BBC than Maxforce FC Select. Mean % mortality (days after exposure) Treatment/ formulation 13 45 6 7 8 11 12 13 14 Untreated check 0.0a 5.0a 5.0a 6.3a 6.3a 6.3a 6.3a 7.5a 7.5a 7.5a 8.8a Maxforce FC 1.3a 2.5a 2.5a 5.0a 5.0a 5.0a 6.3a 11.2a 14.9a 9.8a 9.8a Maxforce FC Select 10.0a 37.5a 37.5a 41.3b 41.3b 42.5b 45.0b 52.5b 57.5b 57.5b 58.8b Means within a column followed by different letters are significantly different (P ≤ 0.05). Maxforce FC and Maxforce FC Select are 0.01BG formulations delivered in a bait station containing 0.4 g product. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EFFICACY OF TWO GEL BAITS FOR CONTROL OF THE BROWN-BANDED COCKROACH, 2004

Arthropod Management Tests , Volume 30 (1) – Jan 1, 2005

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Oxford University Press
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© Published by Oxford University Press.
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2155-9856
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10.1093/amt/30.1.L3
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Abstract

(L3) BIOASSAY: Urban EFFICACY OF TWO GEL BAITS FOR CONTROL OF THE BROWN-BANDED COCKROACH, 2004 Changlu Wang Purdue University Center for Urban and Industrial Pest Management, Department of Entomology 901 W. State St. West Lafayette, IN 47907, USA Phone: (765) 494-7740 Fax: (765) 496-2295 E-mail: cwang@entm.purdue.edu Gary W. Bennett Brown-banded cockroach (BBC): Supella longipalpa (F.) This experiment was conducted in the laboratory to evaluate two cockroach gel baits for the control of a laboratory strain of BBC. The two gel bait products were Maxforce FC and Maxforce FC Select. The BBC were maintained on a mixed diet (peanut butter, mixed fruit jelly, rodent chow, and potato flakes) prior to the experiment. Twenty mid-stage (second to fourth instar) BBC nymphs were placed into each plastic box container (18.7 × 13.3 × 9.5 cm) 1 day before bait introduction. The inner upper portion of the boxes was lightly greased with a mixture of petroleum jelly and mineral oil (2:3) to prevent escaping. Each box contained a cotton-plugged water vial and a 10 × 10 cm cardboard “tent” as a harborage. Approximately 0.4 g of gel bait in a 0.7 ml centrifuge vial was placed in each box after 1 day acclimation period. Each box also received a piece of rodent chow as alternative food. The control box was provided with rodent chow only. Each treatment was applied to three boxes. Cockroach mortality was recorded every 1 – 2 days until 14 days. Weight of the bait vials was measured immediately before exposure to the cockroaches and at 6 DAT. Three vials of bait were placed in the same room for estimation of water loss. Moribund cockroaches (defined by an inability to walk) were considered dead in this experiment. The experiment units were kept in a walk-in environmental chamber at 26 C, 60% RH, and 12:12 h [L:D] photoperiod. Cockroach counts were logarithmic transformed and analyzed using a mixed-effects model repeated measures approach. The bait consumption was analyzed using ANOVA. Maxforce FC Select provided significant higher mortality than the untreated check from 5 DAT. It was significantly more effective than Maxforce FC in controlling BBC (P < 0.001). At 14 DAT, the mean mortality from Maxforce FC Select (after corrected by Abbott’s formula) was 54.8%. Mean consumption per experiment box at 6 DAT was 0.113 ± 0.003 g. Maxforce FC did not cause significantly higher mortality than the untreated check. The mean consumption of Maxforce FC per experiment box at 6 DAT (0.005 ± 0.003 g) was significantly less than that of the Maxforce FC Select bait (0.020 ± 0.004 g) ( P = 0.02), indicating that Maxforce FC was less palatable to BBC than Maxforce FC Select. Mean % mortality (days after exposure) Treatment/ formulation 13 45 6 7 8 11 12 13 14 Untreated check 0.0a 5.0a 5.0a 6.3a 6.3a 6.3a 6.3a 7.5a 7.5a 7.5a 8.8a Maxforce FC 1.3a 2.5a 2.5a 5.0a 5.0a 5.0a 6.3a 11.2a 14.9a 9.8a 9.8a Maxforce FC Select 10.0a 37.5a 37.5a 41.3b 41.3b 42.5b 45.0b 52.5b 57.5b 57.5b 58.8b Means within a column followed by different letters are significantly different (P ≤ 0.05). Maxforce FC and Maxforce FC Select are 0.01BG formulations delivered in a bait station containing 0.4 g product.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2005

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