Comparative Effect of Three Neurotoxic Insecticides With Different Modes of Action on Adult Males and Females of Three Tortricid Moth Pests
| Autor: | Dolors Bosch, Joan Valls, Jesús Avilla, César Gemeno, Miguel A. Navarro-Roldán |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Tortricidae Male Insecticides Adult insect Pyridines Administration Topical Thiazines Moths Lobesia botrana 01 natural sciences Insect Control Toxicology Insecticide Resistance 03 medical and health sciences chemistry.chemical_compound Neonicotinoids Species Specificity Nitriles Pyrethrins Animals Pyrethroid Ecology biology Dose-Response Relationship Drug Organophosphate Neonicotinoid General Medicine Sex difference biology.organism_classification Thiacloprid Grapholita molesta Dose-response 010602 entomology 030104 developmental biology chemistry Insect Science Chlorpyrifos Female Neurotoxic insecticide |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Repositorio Abierto de la UdL Universitad de Lleida |
| ISSN: | 1938-291X 2013-4916 |
| Popis: | Insecticides are the dominant pest management method in fruit and vegetable crops worldwide owing to their quick effect, low cost, and relatively easy application, but they bear negative effects on human health and the environment. Insecticide mode of action (MoA), target species, and sex are variables that could affect insecticide-induced mortality. We recorded the mortality caused by three neurotoxic insecticides with different modes of action (chlorpyrifos [organophosphate, acetylcholinesterase inhibitor], λ-cyhalothrin [pyrethroid, sodium channel modulator], and thiacloprid [neonicotinoid, nicotinic acetylcholinesterase receptor agonist]) applied topically to adult males and females of three economically important tortricid species [Cydia pomonella (L.), Grapholita molesta (Busck), and Lobesia botrana (Denis & Schiffermüller)] that strongly depend on insecticide use for their control. Concentration and dose-mortality curves were recorded at 24 and 48 h postapplication. Large mortality differences between insecticides (maximum 7,800-fold for LD50) were followed by much lower, yet important, differences between species (maximum 115-fold), and sexes (maximum 41.5-fold). Significant interactions between the three factors indicate that they are not independent from each other. Interestingly, with the organophosphate chlorpyrifos, males of the three species were less susceptible than females, which was unexpected, as females are larger than males. Higher female sensitivity to organophosphates has been reported previously but only in G. molesta, not in other moth species. Our results highlight the importance of taking into account sex in dose-mortality studies with adult moths. MAN-R was supported by a Ph.D. fellowship from the University of Lleida. This study was supported by research Grant AGL2013-49164-C2-1 MINECO, Spain. |
| Databáze: | OpenAIRE |
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