Chlorfenapyr is a slow-acting insecticide against western subterranean termite, Reticulitermes hesperus Banks, when applied to sand. The LD50 at day 7 for workers 29.98 ng per termite and considerably higher than that of chlorpyrifos (14.01), cypermethrin (3.21), fipronil (0.16). Brief exposures sand treated with chlorfenapyr resulted in dose-dependent mortality over broad range concentrations. 1-h ≥75 ppm provided >88% kill termites 7. deposits did not repel termites, even 300 ppm. Termites...

Journal Article Toxicity, Uptake, and Transfer Efficiency of Fipronil in Western Subterranean Termite (Isoptera: Rhinotermitidae) Get access Raj K. Saran, Saran Department Entomology, University California, Riverside, CA 92521 Search for other works by this author on: Oxford Academic PubMed Google Scholar Michael Rust Economic Volume 100, Issue 2, 1 April 2007, Pages 495–508, https://doi.org/10.1093/jee/100.2.495 Published: 26 September 2014

The potential horizontal transfer of nonrepellent termiticides has become an important paradigm to control termites in recent years. In this study, 14C-radiolabeled fipronil was used a series laboratory experiments demonstrate the extent and ability lethal amounts unexposed nestmates. Fipronil is active termiticide against western subterranean termites, Reticulitermes hesperus Banks, on sand at relevant doses. It exhibited delayed toxicity with lowest LD50 ≈ap; 0.2 ng/termite expressed...

Journal Article Toxicity, Repellency, and Transfer of Chlorfenapyr Against Western Subterranean Termites (Isoptera: Rhinotermitidae) Get access Michael K. Rust, Rust Department Entomology, University California, Riverside, CA 92521 Search for other works by this author on: Oxford Academic PubMed Google Scholar Raj Saran Economic Volume 99, Issue 3, 1 June 2006, Pages 864–872, https://doi.org/10.1093/jee/99.3.864 Published: 01 2006 history Accepted: October 2005 Received: 04

Degradation and bioavailability of imidacloprid, fipronil, bifenthrin applied at label rates ([AI], wt:wt in soil) the loamy soil Nebraska were determined over a 6-mo duration. Based on calculated half-lives three termiticides, it was concluded that degradation rate lowest when termiticide highest rate. Bioassays Reticulitermes flavipes (Kollar) (Isoptera: Rhinotermitidae) conducted 8, 31, 65, 90, 135, 160, 180 d posttreatment showed an inverse relationship between LT90 values variable...

Western subterranean termite, Reticulitermes hesperus (Banks), prefers various mono-, di-, and trisaccharides, total feeding being the greatest on paper disks treated with 5% ribose followed by 3% xylose, 2% maltose, fructose, arabinose, ribose. In multiple choice tests, termites were not able to discriminate between ribose, maltose. Termites readily take up [14C]sucrose in studies. Most of sucrose is used as an energy source for respiration (89.2%), a very small proportion remains within...

Indoxacarb, a sodium channel-blocking insecticide, has been in widespread use for German cockroach control the United States since 2006. A two-tiered indoxacarb susceptibility monitoring strategy was previously developed as first step toward determining levels field populations. This entails: (tier 1) testing field-collected populations vial bioassays at two diagnostic concentrations; and 2) three doses oral (feeding) with treated bait matrix. In current study technique implemented to...

Existing taxonomic studies of Reticulitermes spp. (Isoptera: Rhinotermitidae) from California provide information on only two described species: hesperus Banks and tibialis Banks. However, while conducting a genetic evaluation the genus North America, we find evidence species that cannot be identified morphologically with existing information. We also update more current about other detected during our investigations, including positive identification R. flavipes California. Therefore, have...

Degradation and bioavailability of imidacloprid, fipronil, bifenthrin applied at label rates ([AI], wt:wt in soil) the loamy soil Nebraska were determined over a 6-mo duration. Based on calculated half-lives three termiticides, it was concluded that degradation rate lowest when termiticide highest rate. Bioassays Reticulitermes flavipes (Kollar) (Isoptera: Rhinotermitidae) conducted 8, 31, 65, 90, 135, 160, 180 d posttreatment showed an inverse relationship between LT90 values variable...

The insecticidial and biological activity of the cyano-substituted neonicotinoid acetamiprid was determined against western subterranean termite, Reticulitermes hesperus Banks (Isoptera: Rhinotermitidae). Acetamiprid very active termites in topical applications, with an LD50 = 0.02 ng per termite. Even though extremely toxic deposits ≥50 ppm on sand were required to consistently provide >90% kill within 7 d after a 1-h exposure. Termites quickly affected by brief exposures treated 1 h, their...

Intrinsic toxicities of chlorantraniliprole, fipronil, and imidacloprid were evaluated with topical applications on worker termites. Worker termites exposed to substrates treated formulated chlorantraniliprole study contact toxicity, tunneling, postexposure behaviors. The intrinsic (LD50, ng/termite) (1.25, 0.96, 0.44) fipronil (0.12, 0.11, 0.13) at 11 d similar for workers from three termite colonies. Imidacloprid toxicity (LD50) values highly variable among the different colonies, ranging...

Isoxazolines inhibit γ-aminobutyric acid chloride channels in insects and acarids by binding to postsynaptic receptors. This prevents influx, leading depolarization/hyperexcitation, paralysis, death. Here, we evaluated the potential utility of a novel isoxazoline, isocycloseram, against several urban insect pests.

The insecticidial and biological activity of the cyano-substituted neonicotinoid acetamiprid was determined against western subterranean termite, Reticulitermes hesperus Banks (Isoptera: Rhinotermitidae). Acetamiprid very active termites in topical applications, with an LD50 = 0.02 ng per termite. Even though extremely toxic deposits ≥50 ppm on sand were required to consistently provide >90% kill within 7 d after a 1-h exposure. Termites quickly affected by brief exposures treated 1 h, their...

Western subterranean termite, Reticulitermes hesperus Banks (Isoptera: Rhinotermitidae), workers fed more on paper disks treated with the carbohydrates xylose, ribose, and fructose than untreated disks. This feeding behavior of termites for certain was used to demonstrate an increase in uptake transfer insect growth regulator hexaflumuron among termites. The addition 3% xylose significantly increased [14C]hexaflumuron its subsequent other Similarly, there a significant mortality (0.1 0.5%)...

Journal Article Phagostimulatory Sugars Enhance Uptake and Horizontal Transfer of Hexaflumuron in the Western Subterranean Termite (Isoptera: Rhinotermitidae) Get access Raj K. Saran, Saran 1 Department Entomology, University California, Riverside, CA 92521 1Corresponding author current address: McLaughlin Gormley King Co., 8810 Tenth Ave. North, Minneapolis, MN 55427 (e-mail: raj.saran@mgk.com). Search for other works by this on: Oxford Academic PubMed Google Scholar Michael Rust Economic...

Abstract The ecological success of ants has made them abundant in most environments, yet inter‐ and intraspecific competition usually limit nest density for a given population. Most invasive ant populations circumvent this limitation through supercolonial structure, eliminating loss nestmate recognition lack aggression toward non‐nestmates. Native to South America, Brachymyrmex patagonicus recently invaded many locations worldwide, with described as extremely large dense. Yet, contrast ants,...