Field evaluations of biodegradable boric acid hydrogel baits for the control of Argentine ants: Promising results in vineyards and citrus orchards

Argentine ants are a major pest in California. In this study, a biodegradable calcium alginate hydrogel with an aqueous boric acid bait was tested against Argentine ant populations in a citrus orchard and a vineyard. A new continuous method was developed to produce large quantities of hydrogel bait...

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Main Authors: Benning Le, Kathleen Campbell, Hoeun Park, Shu-Ping Tseng, Raju Pandey, Gregory S. Simmons, Ruth Henderson, Carmen Gispert, Michael K. Rust, Chow-Yang Lee, Roghaiyeh Karimzadeh, Yong-Lak Park, Dong-Hwan Choe
Format: Article
Language:English
Published: University of California Agriculture and Natural Resources 2024-06-01
Series:California Agriculture
Online Access:https://doi.org/10.3733/001c.120496
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author Benning Le
Kathleen Campbell
Hoeun Park
Shu-Ping Tseng
Raju Pandey
Gregory S. Simmons
Ruth Henderson
Carmen Gispert
Michael K. Rust
Chow-Yang Lee
Roghaiyeh Karimzadeh
Yong-Lak Park
Dong-Hwan Choe
author_facet Benning Le
Kathleen Campbell
Hoeun Park
Shu-Ping Tseng
Raju Pandey
Gregory S. Simmons
Ruth Henderson
Carmen Gispert
Michael K. Rust
Chow-Yang Lee
Roghaiyeh Karimzadeh
Yong-Lak Park
Dong-Hwan Choe
author_sort Benning Le
collection DOAJ
description Argentine ants are a major pest in California. In this study, a biodegradable calcium alginate hydrogel with an aqueous boric acid bait was tested against Argentine ant populations in a citrus orchard and a vineyard. A new continuous method was developed to produce large quantities of hydrogel bait for the field test. Foraging activity levels of ants were compared between baited and untreated zones. For both study sites, four to five monthly bait applications throughout summer provided a greater than 80% reduction in ant activity. Based on spatial analyses by distance indices, the baited areas were characterized by gaps (areas with lower ant counts) and the untreated control zones were characterized by patches (areas with higher ant counts). This indicated area-wide suppression of Argentine ants. For the citrus orchard, post-baiting panel trap monitoring showed reductions of both ants and Asian citrus psyllid in the baited zone compared to the control. For the vineyard, mid-season soil analyses indicated that the impact of boric acid baiting on soil boron concentration was negligible. In sum, the calcium alginate hydrogel bait with boric acid as an active ingredient may provide a promising solution for Argentine ant baiting.
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institution Kabale University
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language English
publishDate 2024-06-01
publisher University of California Agriculture and Natural Resources
record_format Article
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spelling doaj-art-c5cb4d4f562c4c77a1ab5ffd6f4e906e2025-08-20T03:36:31ZengUniversity of California Agriculture and Natural ResourcesCalifornia Agriculture0008-08452160-80912024-06-0178210.3733/001c.120496Field evaluations of biodegradable boric acid hydrogel baits for the control of Argentine ants: Promising results in vineyards and citrus orchardsBenning LeKathleen CampbellHoeun ParkShu-Ping TsengRaju PandeyGregory S. SimmonsRuth HendersonCarmen GispertMichael K. RustChow-Yang LeeRoghaiyeh KarimzadehYong-Lak ParkDong-Hwan ChoeArgentine ants are a major pest in California. In this study, a biodegradable calcium alginate hydrogel with an aqueous boric acid bait was tested against Argentine ant populations in a citrus orchard and a vineyard. A new continuous method was developed to produce large quantities of hydrogel bait for the field test. Foraging activity levels of ants were compared between baited and untreated zones. For both study sites, four to five monthly bait applications throughout summer provided a greater than 80% reduction in ant activity. Based on spatial analyses by distance indices, the baited areas were characterized by gaps (areas with lower ant counts) and the untreated control zones were characterized by patches (areas with higher ant counts). This indicated area-wide suppression of Argentine ants. For the citrus orchard, post-baiting panel trap monitoring showed reductions of both ants and Asian citrus psyllid in the baited zone compared to the control. For the vineyard, mid-season soil analyses indicated that the impact of boric acid baiting on soil boron concentration was negligible. In sum, the calcium alginate hydrogel bait with boric acid as an active ingredient may provide a promising solution for Argentine ant baiting.https://doi.org/10.3733/001c.120496
spellingShingle Benning Le
Kathleen Campbell
Hoeun Park
Shu-Ping Tseng
Raju Pandey
Gregory S. Simmons
Ruth Henderson
Carmen Gispert
Michael K. Rust
Chow-Yang Lee
Roghaiyeh Karimzadeh
Yong-Lak Park
Dong-Hwan Choe
Field evaluations of biodegradable boric acid hydrogel baits for the control of Argentine ants: Promising results in vineyards and citrus orchards
California Agriculture
title Field evaluations of biodegradable boric acid hydrogel baits for the control of Argentine ants: Promising results in vineyards and citrus orchards
title_full Field evaluations of biodegradable boric acid hydrogel baits for the control of Argentine ants: Promising results in vineyards and citrus orchards
title_fullStr Field evaluations of biodegradable boric acid hydrogel baits for the control of Argentine ants: Promising results in vineyards and citrus orchards
title_full_unstemmed Field evaluations of biodegradable boric acid hydrogel baits for the control of Argentine ants: Promising results in vineyards and citrus orchards
title_short Field evaluations of biodegradable boric acid hydrogel baits for the control of Argentine ants: Promising results in vineyards and citrus orchards
title_sort field evaluations of biodegradable boric acid hydrogel baits for the control of argentine ants promising results in vineyards and citrus orchards
url https://doi.org/10.3733/001c.120496
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