Sensitivity of polyphagous (Plodia interpunctella) and stenophagous (Ephestia kuehniella) storage moths to residual insecticides: effect of formulation and larval age

Abstract

Pyralid moths, Ephestia kuehniella and Plodia interpunctella, are prevalent stored product pests. The insecticides are the main tool to control these moths in the stores. The data describing the response of these moths to insecticides are scarce. The lethal effect of the organophosphate, pyrethroid, and halogenated‐pyrrole on moths larvae were compared in laboratory test. The hypothesis was that the very polyphagous P. interpunctella would have generally higher insecticide tolerance than that of the stenophagous E. kuehniella. Different insecticide concentrations were applied onto the inner surface of glass tube vials. Ten larvae of 14 or 21 d old of E. kuehniella and 7 or 14 d old of P. interpunctella were used by treatment. The larval mortality was checked after 24 h of exposure. The mortality was significantly influenced by age of larvae and the groups of chemicals. No differences among the efficacies of the tested formulations with identical active compounds were found, except significant different mortality of E. kuehniella on deltamethrin formulations. A comparison of analytical standards showed that P. interpunctella was less susceptible to the active ingredient pirimiphos‐methyl than E. kuehniella, while E. kuehniella was less susceptible to deltamethrin than P. interpunctella. No differences between the two species were observed for chlorfenapyr. We therefore rejected the hypothesis that polyphagy/stenophagy can be a general predictor of insecticide tolerance in the two tested storage moths. The most important finding for effective use was that the young larvae of both species were more susceptible to tested insecticides than older larvae.

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

“…A vast number of studies on the efficacy of synthetic residual insecticide deposits [ 35 , 38 , 332 ] have been published on Blattodea [ 38 , 395 ], Hymenoptera [ 396 ], Coleoptera [ 34 , 367 , 397 , 398 , 399 , 400 , 401 ], Psocoptera [ 402 , 403 ], and Acarina [ 404 , 405 , 406 , 407 ]. Relatively less abundant are studies on Diptera [ 408 ], Lepidoptera [ 401 , 409 ], Zygentoma, and Orthoptera [ 410 ]. Most data on botanical insecticides are available on Coleoptera, followed by Lepidoptera, Psocoptera, Acari [ 69 ], and Blattodea [ 38 , 395 ].…”

Identification and functional characterization of female antennae‐biased odorant receptor 23 involved in acetophenone detection of the Indian meal moth Plodia interpunctella

“…A variety of agents have been used to control P. interpunctella , including synthetic pesticides (Stejskal et al. , 2021), Bacillus thuringiensis (Oluwafemi et al. , 2009), parasitoids (Eliopoulos & Stathas, 2008), and some essential oils (Jesser et al.…”

Spore yield of the microsporidium Nosema pyrausta (Paillot) Weiser, 1961 is influenced the insect host rearing temperature and diet composition

“…Despite the fact that the modern chemical pesticides can be safe when all application regulations are respected , the insecticides might be applied under suboptimal conditions. The examples of such situations include unsuitable abiotic factors (Amarasekare, Edelson, 2004;Rao et al, 2021) and inappropriate developmental stages of the pests (Vivan et al, 2017;Stejskal et al, 2021), forcing the farmers to remarkably increase dosage and frequency of insecticide application. For these reasons, alternative means of pest control are of great importance, including entomopathogenic microorganisms which do not pollute the environment yet persist in pest populations causing either acute infections providing either relatively fast killing or chronic diseases affecting pest viability with transgenerational effects (Lewis et al, 2006;Solter et al, 2012;Litwin et al, 2020;Deka et al, 2021).…”