Phosphine Resistance in Adult and Immature Life Stages of Tribolium castaneum (Coleoptera: Tenebrionidae) and Plodia interpunctella (Lepidoptera: Pyralidae) Populations in California
| Autor: | E. Hosoda, George P. Opit, S. G. Gautam |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Integrated pest management Male Insecticides animal structures Phosphines Population Fumigation Moths 010603 evolutionary biology 01 natural sciences Lepidoptera genitalia Toxicology Insecticide Resistance chemistry.chemical_compound Animals Red flour beetle education Pyralidae Ovum Larva education.field_of_study Tribolium Ecology biology fungi General Medicine biology.organism_classification 010602 entomology chemistry Insect Science Female Phosphine |
| Zdroj: | Journal of economic entomology. 109(6) |
| ISSN: | 1938-291X |
| Popis: | Phosphine resistance in stored-product insects occurs worldwide and is a major challenge to continued effective use of this fumigant. We determined resistance frequencies and levels of resistance in Tribolium castaneum and Plodia interpunctella collected from California almond storage and processing facilities. Discriminating doses of phosphine were established for eggs and larvae of P. interpunctella and eggs of T. castaneum using laboratory susceptible strains of the two species. For T. castaneum and P. interpunctella eggs, discriminating doses were 62.4 and 107.8 ppm, respectively, over a 3-d fumigation period, and for P. interpunctella larvae, discriminating dose was 98.7 ppm over a 20-h fumigation period. Discriminating dose tests on adults and eggs showed that 4 out of 11 T. castaneum populations tested had resistance frequencies that ranged from 42 to 100% for adults and 54 to 100% for eggs. LC99 values for the susceptible and the most resistant adults of T. castaneum were 7.4 and 356.9 ppm over 3 d, respectively. LC99 values for T. castaneum eggs were 51.5 and 653.9 ppm, respectively. Based on adult data, the most resistant T. castaneum beetle population was 49× more resistant than the susceptible strain. Phosphine resistance frequencies in P. interpunctella eggs ranged from 4 to 20%. Results show phosphine resistance is present in both species in California. Future research will investigate phosphine resistance over a wider geographic area. In addition, the history of pest management practices in facilities where insects tested in this study originated will be determined in order to develop phosphine resistance management strategies for California almond storage and processing facilities. |
| Databáze: | OpenAIRE |
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