Hydrogels: From Controlled Release to a New Bait Delivery for Insect Pest Management

Tay, Jia-Wei; Choe, Dong–Hwan; Mulchandani, Ashok; Rust, Michael Κ.

doi:10.1093/jee/toaa183

Cited by 32 publications

(31 citation statements)

References 71 publications

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“…Additionally, some safe industrial wastes, such as filter cakes and triplex powders (by-products of aluminum sulfate and soap factories in Ethiopia), have been tested as insecticides [ 593 ]. Recently, hydrogel bait formulations [ 455 , 456 ], artificial insecticide sweeteners [ 276 ], and dRNA-based disruptors [ 283 ] have been suggested as new or emerging smart technologies for the establishment of new generations of food baits.…”

Section: Discussionmentioning

confidence: 99%

“…Bait activity can also be associated with the soft physical structure and/or high content of water in the bait. The criteria regarding the required bait properties are usually fulfilled by most traditional or chemical (frequently hydrophilic) gels and pastes, micro-encapsulated oil baits [ 454 ], and polyacrylate hydrogels (ants [ 455 ], wasps [ 456 ]). The attractiveness can be enhanced by pheromone addition into baits [ 457 ], which is in practice known as the “pheromone-assisted baiting technique” [ 458 ].…”

Section: Insecticide Gel and Foam Application Formulationsmentioning

confidence: 99%

“…The most extensive current application of the modern generation of baits mainly concerns food and urban pests, such as cockroaches (Blattodea), flies (Diptera) [ 472 ], and ants and wasps (Hymenoptera) [ 456 ]. For some of these pests, it has been reported that the accelerated activity of baits is based on toxicant horizontal/secondary transmission.…”

Section: Insecticide Gel and Foam Application Formulationsmentioning

confidence: 99%

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Synthetic and Natural Insecticides: Gas, Liquid, Gel and Solid Formulations for Stored-Product and Food-Industry Pest Control

Stejskal

Vendl

Aulický

et al. 2021

Insects

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The selective application of insecticides is one of the cornerstones of integrated pest management (IPM) and management strategies for pest resistance to insecticides. The present work provides a comprehensive overview of the traditional and new methods for the application of gas, liquid, gel, and solid physical insecticide formulations to control stored-product and food industry urban pests from the taxa Acarina, Blattodea, Coleoptera, Diptera, Hymenoptera, Lepidoptera, Psocoptera, and Zygentoma. Various definitions and concepts historically and currently used for various pesticide application formulations and methods are also described. This review demonstrates that new technological advances have sparked renewed research interest in the optimization of conventional methods such as insecticide aerosols, sprays, fumigants, and inert gases. Insect growth regulators/disruptors (IGRs/IGDs) are increasingly employed in baits, aerosols, residual treatments, and as spray-residual protectants for long-term stored-grain protection. Insecticide-impregnated hypoxic multilayer bags have been proven to be one of the most promising low-cost and safe methods for hermetic grain storage in developing countries. Insecticide-impregnated netting and food baits were originally developed for the control of urban/medical pests and have been recognized as an innovative technology for the protection of stored commodities. New biodegradable acaricide gel coatings and nets have been suggested for the protection of ham meat. Tablets and satchels represent a new approach for the application of botanicals. Many emerging technologies can be found in the form of impregnated protective packaging (insect growth regulators/disruptors (IGRs/IGDs), natural repellents), pheromone-based attracticides, electrostatic dust or sprays, nanoparticles, edible artificial sweeteners, hydrogels, inert baits with synthetic attractants, biodegradable encapsulations of active ingredients, and cyanogenic protective grain coatings. Smart pest control technologies based on RNA-based gene silencing compounds incorporated into food baits stand at the forefront of current strategic research. Inert gases and dust (diatomaceous earth) are positive examples of alternatives to synthetic pesticide products, for which methods of application and their integration with other methods have been proposed and implemented in practice. Although many promising laboratory studies have been conducted on the biological activity of natural botanical insecticides, published studies demonstrating their effective industrial field usage in grain stores and food production facilities are scarce. This review shows that the current problems associated with the application of some natural botanical insecticides (e.g., sorption, stability, field efficacy, and smell) to some extent echo problems that were frequently encountered and addressed almost 100 years ago during the transition from ancient to modern classical chemical pest control methods.

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Section: Discussionmentioning

confidence: 99%

Section: Insecticide Gel and Foam Application Formulationsmentioning

confidence: 99%

Section: Insecticide Gel and Foam Application Formulationsmentioning

confidence: 99%

See 1 more Smart Citation

Synthetic and Natural Insecticides: Gas, Liquid, Gel and Solid Formulations for Stored-Product and Food-Industry Pest Control

Stejskal

Vendl

Aulický

et al. 2021

Insects

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show abstract

“…When absorption is complete, the hydrogels take on a gelatinous appearance. Hydrogels, as tools in pest management, were recently reviewed [ 50 ].…”

Section: Alternative Methods Of Ant Controlmentioning

confidence: 99%

Alternative Methods of Ant (Hymenoptera: Formicidae) Control with Emphasis on the Argentine Ant, Linepithema humile

Suiter

Gochnour

Holloway

et al. 2021

Insects

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Ants (Hymenoptera: Formicidae), especially the Argentine ant, Linepithema humile (Mayr), can be significant nuisance pests in urban and suburban environments. Conventional interventions have primarily relied on the use of chemical insecticides, namely fipronil and bifenthrin, applied as residual, contact treatments around the outside perimeter of infested structures. Despite tightening regulation limiting the scope of insecticide applications in urban settings, dependence on these products to manage ants continues, resulting in significant water contamination. The U.S. EPA, in response, has further restricted the use patterns of many insecticides used for ant control in professional and over-the-counter markets. The purpose of this review is to summarize the relevant literature associated with controlling nuisance pest ants, with emphasis on L. humile, without the use of liquid broadcast applications of EPA-registered insecticides while focusing on low-impact, alternative (to broadcast applications) pest control methods. Specific subsections include Trail Pheromone; Use of Behavior-Modifying Chemicals; Mass Trapping; Hydrogels, “Virtual” Baiting, and Exceedingly-Low Bait Concentrations; Food Source Reduction; Deterrents; and RNA Interference (RNAi).

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“…Although not yet a commercial product, toxic bait delivered in polyacrylamide hydrogels has proven to be highly efficacious against the Argentine ant, Linepithema humile, in numerous locations in both laboratory and field settings, [9][10][11][12][13] as well as against numerous other invasive ant species. 14,15 This bait delivery form is likely to have a future role in ant management, especially within eradication programs.…”

Section: Introductionmentioning

confidence: 99%

Laboratory and field insights into the dynamics and behavior of Argentine ants, Linepithema humile, feeding from hydrogels

Cabrera

Fontan

Hoffmann

et al. 2021

Pest Management Science

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BACKGROUND: Hydrogels that have absorbed a liquid containing a toxicant are a novel form of bait-delivery for ant control.Here, we study the abilities of Argentine ant (Linepithema humile) workers to imbibe liquid from hydrogels. We quantified feeding behavior with: (i) hydrogels containing different sucrose concentrations (20, 30, 40 and 50% w/w); (ii) hydrogels versus liquid droplets; and (iii) hydrogel age (air exposure time). We also performed a field assay to assess visits by L. humile and other ant species to hydrogels. RESULTS: Ingested volume and feeding time decreased with increasing sucrose concentrations, but the number and duration of pauses were similar. Feeding from hydrogels was slower than from a liquid droplet and ants imbibed less liquid and fed for shorter times from hydrogels. Feeding time increased with hydrogel age, whereas ingested volume decreased and approached zero after 120 min under laboratory conditions. In the field, ants attended the hydrogels during the full 120-min study period. When L. humile workers found a hydrogel, they monopolized it to the exclusion of other ant species. L. humile occupied and dominated hydrogels predominantly in shaded locations.CONCLUSION: Hydrogels with sucrose concentrations no greater than 30% appear best for liquid uptake by L. humile. Hydrogels not in direct sunlight will have greater attendance by L. humile and, therefore, less attendance by non-target ant species. Shady and humid places may prolong the longevity of hydrogels, which would imply higher intakes.

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Hydrogels: From Controlled Release to a New Bait Delivery for Insect Pest Management

Cited by 32 publications

References 71 publications

Synthetic and Natural Insecticides: Gas, Liquid, Gel and Solid Formulations for Stored-Product and Food-Industry Pest Control

Synthetic and Natural Insecticides: Gas, Liquid, Gel and Solid Formulations for Stored-Product and Food-Industry Pest Control

Alternative Methods of Ant (Hymenoptera: Formicidae) Control with Emphasis on the Argentine Ant, Linepithema humile

Laboratory and field insights into the dynamics and behavior of Argentine ants, Linepithema humile, feeding from hydrogels

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