Efficacy of a Combination of Beta-Cyfluthrin and Imidacloprid and Beta-Cyfluthrin Alone for Control of Stored-Product Insects on Concrete

Abstract

The insecticidal effect of Temprid, a formulation that contains beta-cyfluthrin and imidacloprid, was tested on concrete for control of seven stored-product insect species: the rusty grain beetle, Cryptolestes ferrugineus (Stephens); the sawtoothed grain beetle, Oryzaephilus surinamensis (L.); the red flour beetle, Tribolium castaneum (Herbst); the confused flour beetle, T. confusum Jacquelin du Val; the hide beetle, Dermestes maculatus (DeGeer); and the psocids Liposcelis bostrychophila Badonnel and L. paeta Pearman. Temprid, which contains 10.5% beta-cyfluthrin and 21% imidacloprid, was tested at the rate of 17.2 ml of formulation/4.1 liters of water/100 m2. Adults were exposed for 4, 8, 14, and 24 h, and then daily for 7 d, on untreated dishes or dishes treated with Temprid. In the untreated dishes, mortality of C. ferrugineus and O. surinamensis was lower when food was present, but food did not affect mortality of the other species. Presence of food did not affect mortality of any of the species tested in the treated dishes. C. ferrugineus, O. surinamensis, and the two psocid species were very susceptible to Temprid, with mortality of 97-100% after 7 d of exposure. In contrast, D. maculatus, T. castaneum, and T. confusum were tolerant to Temprid, as mortality did not exceed 57, 25, and 17%, respectively, at the 7-d exposure. A separate series of similar bioassays with Tempo, a formulation that contains 11.8% beta-cyfluthrin alone, which was applied at the same dose rate as Temprid, was conducted using O. surinamensis and T. castaneum as the target insect species, and results showed that Tempo was at least as effective as Temprid. Our results indicate that the simultaneous use of beta-cyfluthrin with imidacloprid is not more effective on concrete than beta-cyfluthrin alone, and efficacy of both formulations varies with the target species.

Efficacy of alpha-cypermethrin and thiamethoxam against Trogoderma granarium Everts (Coleoptera: Dermestidae) and Tenebrio molitor L. (Coleoptera: Tenebrionidae) on concrete

“…Given the extensive use of pyrethroids, a group of insecticides that have a different mode of action, such as neonicotinoids, may provide a good and viable alternative to resistance management strategies but further experimentation is needed to clarify this issue. In a recent study, however, Athanassiou et al (2013) found that Tempo, a formulation that contained only beta-cyfluthrin, was equally effective to Temprid, a formulation containing both beta-cyfluthrin and imidacloprid, for the control of O. surinamensis and T. castaneum. In our study, we found that from the two insecticides that were tested Table 2 Mean immediate ± SE mortality (%) of T. granarium adults, small or large larvae and T. molitor adults, small or large larvae exposed on concrete with wheat or bran respectively for 1, 3 and 7 d in dishes treated with alpha-cypermethrin and thiamethoxam at 0.025 and 0.1 mg (a.i.…”

Residual efficacy of deltamethrin and β-cyfluthrin against Trogoderma variabile and Trogoderma inclusum (Coleoptera: Dermestidae)

“…Although there have been some studies on evaluation of the efficacy of b-cyfluthrin against stored product insects (Arthur, 2000;Toews et al, 2009Toews et al, , 2010Athanassiou et al, 2013;Sehgal et al, 2014), there are no data on the new deltamethrin formulations, or little published information on the efficacy of these products related to residual efficacy on dermestid species. The new formulation of b-cyfluthrin, Tempo ® SC Ultra, has replaced the previous emulsifiable concentrate [EC] and wettable powder [WP] formulations (Arthur et al, 2015).…”

Residual efficacy of cypermethrin and pirimiphos-methyl against Sitophilus granarius (L.) and Plodia interpunctella (Hübner) on concrete surface

“…metal, wood or concrete), species of stored product insects or duration of exposure (White & Leesch, 1996;Arthur, 1994Arthur, , 1997Arthur, , 1998Arthur, , 1999Collins et al, 2000;Athanassiou et al, 2013;Jankov et al, 2013;Rumbos et al, 2014). The present study therefore focused on examining the residual efficacy of EC formulations of cypermethrin (with piperonyl butoxide) and pirimiphos-methyl applied at label rates against S. granarius adults and P. interpunctella larvae on concrete surface after different periods of contact with treated surface and seven days of recovery on untreated grain.…”