Zobrazeno 1 - 10 of 143 pro vyhledávání: '"CHARLES O. KNOWLES"'
1
Pharmacokinetic Mechanisms Associated with Synergism by DEF of Cypermethrin Toxicity in Larval and Adult Helicoverpa zea, Spodoptera frugiperda, and Agrotis ipsilon (Lepidoptera: Noctuidae)
Autor: K. Amin Usmani, Charles O. Knowles
Publikováno v: Journal of Economic Entomology. 94:874-883
Penetration, metabolism, and excretion of radiocarbon were observed after topical treatment of Helicoverpa zea (Boddie), Spodoptera frugiperda (J. E. Smith), and Agrotis ipsilon (Hufnagle) larvae and adults with cypermethrin-14C. These pharmacokineti
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::70cd42a65302f65c6f9574e6a5ee7432
https://doi.org/10.1603/0022-0493-94.4.874
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2
Toxicity of Pyrethroids and Effect of Synergists to Larval and Adult Helicoverpa zea, Spodoptera frugiperda, and Agrotis ipsilon(Lepidoptera: Noctuidae)
Autor: Charles O. Knowles, K. Amin Usmani
Publikováno v: Journal of Economic Entomology. 94:868-873
Based on 48 h LD50 estimates from topical bioassays, cypermethrin was more toxic than permethrin to Helicoverpa zea (Boddie) larvae and adults; however, the two pyrethroids did not differ significantly in their relative toxicities to Spodoptera frugi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::98f6616c1631ee95ead9123e0793a5b0
https://doi.org/10.1603/0022-0493-94.4.868
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3
Monitoring Pyrethroid Resistance in Bollworm (Lepidoptera: Noctuidae) Moths in Missouri, 1988 to 1994
Autor: Howard G. Townsend, Samir F. Abd-Elghafar, Clyde E. Sorenson, Alan A. Schreiber, Mahlon L. Fairchild, Charles O. Knowles
Publikováno v: Journal of Entomological Science. 33:300-312
From 1988 to 1994, adult vial bioassays were conducted on bollworms, Helicoverpa zea (Boddie), collected from pheromone traps in Missouri to determine their susceptibility to pyrethroids. Although most moths were susceptible to cypermethrin, many ass
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::383ad8df4a610e03bd1638b519284a8a
https://doi.org/10.18474/0749-8004-33.3.300
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4
[Untitled]
Autor: Wei Liu, Ibrahim Gencsoylu, Charles O. Knowles, K. Amin Usmani
Publikováno v: Experimental and Applied Acarology. 22:343-351
Using a continuous exposure technique, the toxicity of 35 compounds to the bulb mite, Rhizoglyphus echinopus (Fumouze and Robin) was examined after 48 h. Sixteen acaricides yielded an LC50 of 11.0 mg cm-2).
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::37b71928478bad85238a26645c543ddb
https://doi.org/10.1023/a:1024513125550
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5
[Untitled]
Autor: Ibrahim Gencsoylu, Charles O. Knowles, K. Amin Usmani, Wei Liu
Publikováno v: Enperimental and Applied Acarology. 22:157-166
Methomyl was 15 and 31.3 times more toxic than bendiocarb to bulb mites at the LC50 and LC90 values respectively. However, methomyl (pI50 3.0) was at least 126 times less active than bendiocarb (pI50 5.1) as an inhibitor of bulb mite cholinesterase i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5c103b0aa90621366f41df8a2b424aeb
https://doi.org/10.1023/a:1006054012500
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7
Pharmacokinetics of Fenvalerate in Laboratory and Field Strains of Helicoverpa zea (Lepidoptera: Noctuidae)
Autor: Charles O. Knowles, Samir F. Abd-Elghafar
Publikováno v: Journal of Economic Entomology. 89:590-593
Pharmacokinetics of fenvalerate- 14 C were examined in the bollworm, Helicoverpa zea (Boddie), 3rd instars from a pyrethroid-susceptible strain (BCIRL-S), a field strain (ARK) that possessed a low level of resistance to this pyrethroid (resistance ra
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::17d842aba0c802377a93c3c3f4dc1000
https://doi.org/10.1093/jee/89.3.590
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8
Clofentezine toxicity and fate in the bulb mite Rhizoglyphus echinopus (Acari: Acaridae)
Autor: Wei Liu, Charles O. Knowles, Guangyu Zhao
Publikováno v: EXPERIMENTAL AND APPLIED ACAROLOGY. 20:215-222
Clofentezine was toxic to bulb mite, Rhizoglyphus echinopus (Fumouze and Robin), eggs and larvae; however, it was not toxic to adults alone or in the presence of piperonyl butoxide. When adults were exposed to radioactive clofentezine, the acaricide
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7b1a5bce665e3318f05f52f8e0501611
https://doi.org/10.1007/bf00054513
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9
Amitraz Effect on the Pharmacokinetics of Permethrin in Helicoverpa zea (Lepidoptera: Noctuidae)
Autor: Samir F. Abd-Elghafar, Charles O. Knowles, Amin K. Usmani
Publikováno v: Journal of Economic Entomology. 88:1580-1585
Topical treatment of bollworm, Helicoverpa zea (Boddie), 3rd instars with amitraz 30 min before topical application of cis - or trans -permethrin14C resulted in a decreased rate of pyrethroid metabolism when compared with larvae treated with the resp
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fb1111ab5915a873fd3f8848dccf457b
https://doi.org/10.1093/jee/88.6.1580
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10
Mechanisms conferring resistance of Western flower thrips to bendiocarb
Autor: Guangyu Zhao, Charles O. Knowles, Wei Liu
Publikováno v: Pesticide Science. 44:293-297
Mechanisms associated with bendiocarb resistance were examined in two strains of western flower thrips, Frankliniella occidentalis (Pergande), that differed in their susceptibility to this carbamate by 13.6-fold. No appreciable differences between th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::428b45574f92985a71019d225eaa3031
https://doi.org/10.1002/ps.2780440313
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