Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Donald Ashdown"'
Publikováno v:
Journal of Economic Entomology. 73:458-461
Biotype D greenbugs, Schizaphis graminum (Rondani), were shown to have developed cross resistance within the organophosphate insecticides. Resistance levels to disulfoton ranged from 10.6- to 37-fold over the susceptible Stillwater, OK, strain which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a14c0fae513cfedac57e3bc29d9900c3
https://doi.org/10.1093/jee/73.3.458
https://doi.org/10.1093/jee/73.3.458
Publikováno v:
Journal of Economic Entomology. 37:269-276
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5c504a8a87fa3841dfe72f81a0ede92
https://doi.org/10.1093/jee/37.2.269
https://doi.org/10.1093/jee/37.2.269
Autor:
Donald Ashdown, Charles R. Ward, John C. Owens, Ellis W. Huddleston, Gene L. Richardson, Tom M. Hillis
Publikováno v:
Journal of Economic Entomology. 65:523-529
A large population of mites, primarily Oligonychus pratensis (Banks), was reported attacking grain sorghum, Sorghum bicolor (L.) Moench, in the Hereford, Texas, Area in 1967. A 2-year study in the Hereford area showed that Supracide® ( O,O -dimethyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bea1a4397b1e581e92d6068e37322a84
https://doi.org/10.1093/jee/65.2.523
https://doi.org/10.1093/jee/65.2.523
Autor:
Ellis W. Huddleston, Gerald E. Wilde, Charles E. Forehand, Bruce Maunder, Charles R. Ward, Donald Ashdown
Publikováno v:
Journal of Economic Entomology. 65:851-855
Grain sorghum, Sorghum bicolor (L.) Moench, was first attacked by Contarinia sorghicola (Coquillett) in highly damaging numbers on the High Plains of Texas in 1961. Aerial applications of parathion, toxaphene and a combination of the two applied to s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a66c8c76dbf462582245b08b3a9c7e15
https://doi.org/10.1093/jee/65.3.851
https://doi.org/10.1093/jee/65.3.851
Autor:
Donald Ashdown, Thomas C. Watkins
Publikováno v:
Journal of Economic Entomology. 41:252-258
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1227bab30e786967f12aef1c25d3241
https://doi.org/10.1093/jee/41.2.252
https://doi.org/10.1093/jee/41.2.252
Publikováno v:
Journal of Economic Entomology. 65:764-767
Schizaphis graminum (Rondani) on wheat can still be effectively controlled using the standard parathion and methyl parathion treatments, however, additional insecticides were screened to determine their effectiveness so that alternate effective treat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34d6403614aeba3562b3d009b5f90018
https://doi.org/10.1093/jee/65.3.764
https://doi.org/10.1093/jee/65.3.764
Autor:
Thomas C. Watkins, Donald Ashdown
Publikováno v:
Journal of Economic Entomology. 41:378-382
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4f77a883778cbabb6f8485911c396a9
https://doi.org/10.1093/jee/41.3.378
https://doi.org/10.1093/jee/41.3.378
Autor:
Donald Ashdown
Publikováno v:
Bulletin of the Entomological Society of America. 13:214-216
The student enrollment in American universities has increased more than 100-fold since the old masters introduced the teaching of entomology at the college level. At the turn of the present century, most land-grant institutions had at least begun a f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4bd75ae900095b2e0dee6e8587bb8f35
https://doi.org/10.1093/besa/13.3.214
https://doi.org/10.1093/besa/13.3.214
Publikováno v:
Journal of Economic Entomology. 65:561-563
Foliar applications of disulfoton liquid concentrate at rates up to 2.5 lb active ingredient (AI) per acre resulted in negligible burn. rates up to 4 lb AI/acre resulted in slight burn but did not significantly affect yields. Three foliar application
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc2b69d2eb55ab2d0cb96b8d0ec62b96
https://doi.org/10.1093/jee/65.2.561
https://doi.org/10.1093/jee/65.2.561
Autor:
Donald Ashdown
Publikováno v:
Bulletin of the Entomological Society of America. 17:144-146
The four-year program in entomology has neither birth date nor anniversary. It has simply evolved in scores of institutions through the efforts of numerous teachers; communication among its many specialties is difficult, and definition of limits is i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::165e834fe34ddf1f9c588dd55bec403a
https://doi.org/10.1093/besa/17.3.144
https://doi.org/10.1093/besa/17.3.144