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| Web URL(s): | https://academic.oup.com/jee/article/76/2/219/2213778/Age-Variation-in-Insecticide-Susceptibility-and
Last checked: 02/28/2017
Access conditions: Item is within a limited-access website
Notes: Guide page |
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| Publication Type:
| Refereed |
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| Author(s): | Yu, S. J. |
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| Author Affiliation: | Department of Entomology and Nematology, University of Florida, Gainesville, Florida |
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| Title: | Age variation in insecticide susceptibility and detoxification capacity of fall armyworm (Lepidoptera: Noctuidae) larvae |
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| Source: | Journal of Economic Entomology. Vol. 76, No. 2, April 1983, p. 219-222. |
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| Publishing Information: | Lanham, Maryland: Entomological Society of America |
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| # of Pages: | 4 |
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| Keywords: | TIC Keywords: Decontamination; Diazinon; Insecticide evaluation; Insecticide resistance; Larva; Methomyl; Permethrin; Spodoptera frugiperda
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| Abstract/Contents: | "The susceptibility of Spodoptera frugiperda (J. E. Smith) to methomyl, diazinon, and permethrin in relation to larval development was investigated. Increased LD50s of these insecticides were associated with increasing larval instars. Sixth instars were 135-, 154-, and 236-fold more tolerant of methomyl, diazinon, and permethrin, respectively, than were 3rd instars on a per-larva basis; the tolerances became 3.1-, 3.2-, and 5.6-fold, respectively, on a body weight basis. In all instances, a larger difference in tolerance was observed between 5th- and 6th-instars than between any other two successive instars. The fact that injection of methomyl into the 5th- and 6th-instars thereby bypassing the cuticle, did not alter the tendency suggests that the large increases in tolerance in the final instars were not related to cuticular penetration. Biochemical studies revealed that increased midgut aldrin epoxidase activity was associated with increased larval instars on a protein basis. A similar pattern was also observed for the midgut glutathione S-transferase activity, whereas the midgut esterase activity appeared to be higher in younger instars. Piperonyl butoxide, the well-known inhibitor of microsomal oxidases, enhanced the toxicity of these insecticides in this insect. Changes in microsomal oxidase activity correlate well with the toxicity of these insecticides to fall armyworm larvae." |
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| Language: | English |
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| References: | 21 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Yu, S. J. 1983. Age variation in insecticide susceptibility and detoxification capacity of fall armyworm (Lepidoptera: Noctuidae) larvae. J. Econ. Entomol. 76(2):p. 219-222. |
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| Web URL(s):
https://academic.oup.com/jee/article/76/2/219/2213778/Age-Variation-in-Insecticide-Susceptibility-and
Last checked: 02/28/2017
Access conditions: Item is within a limited-access website
Notes: Guide page |
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MSU catalog number: b2222995a |
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