Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Albert W. Johnson"'
Publikováno v:
Journal of Economic Entomology. 95:1294-1302
Levels of pyridine alkaloids were measured in 18 tobacco, Nicotiana tabacum L., entries from three parental isolines (‘NC 95’, ‘SC 58’, and ‘Coker 139’), grown at Tifton, GA, Florence, SC, and Oxford, NC, in 1991. Levels of alkaloids in b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3030787389fb9eec56131246c8945728
https://doi.org/10.1603/0022-0493-95.6.1294
https://doi.org/10.1603/0022-0493-95.6.1294
Publikováno v:
Crop Science. 42:2004-2010
Six grass species (zoysiagrass, bermudagrass, centipedegrass, tall fescue, St. Augustinegrass, and Kentucky bluegrass) were analyzed for polyphenols and flavonoids by high performance liquid chromatography. Each gave a characteristic leaf chemistry p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1b8be6cc6339f0809a90d63bedf401a
https://doi.org/10.2135/cropsci2002.2004
https://doi.org/10.2135/cropsci2002.2004
Publikováno v:
Journal of Entomological Science. 37:154-165
Sugar ester producing tobacco lines were evaluated for aphid resistance and other surface chemicals. The cembrenoid and labdenoid diterpenes, α- and β-4,8,13-duvatrien-1-ols, α- and β-4,8,13-duvatriene-1,3-diols, (12Z)-labda-12,14-diene-8α-ol (c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef8af9a90f0c2017acaf60fa6d3a3f78
https://doi.org/10.18474/0749-8004-37.2.154
https://doi.org/10.18474/0749-8004-37.2.154
Publikováno v:
Journal of Entomological Science. 33:292-299
Four synthetic sucrose esters were evaluated in the laboratory and field to determine their insecticidal activity on the tobacco aphid, Myzus nicotianae Blackman. Synthetic sucrose esters provided moderate to good insecticidal activity against tobacc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0fca02c667c3e8debdcf32a2ea4f2020
https://doi.org/10.18474/0749-8004-33.3.292
https://doi.org/10.18474/0749-8004-33.3.292
Autor:
Albert W. Johnson, Yulu Xia
Publikováno v:
Journal of Economic Entomology. 90:1010-1014
The effects of leaf surface moisture and relative humidity on the toxicity of sugar esters extracted from Nicotiana gossei Domin to the tobacco aphid, Myzus nicotianae Blackman, were examined in the laboratory and the field. The efficacy of sugar est
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c1df09a7d99a6cd05c4f1323469b0a8
https://doi.org/10.1093/jee/90.4.1010
https://doi.org/10.1093/jee/90.4.1010
Publikováno v:
Journal of Economic Entomology. 90:1015-1021
Eighteen humectants were evaluated in the laboratory and in the field to determine if they enhanced the insecticidal activity of natural and synthetic sugar esters against the tobacco aphid, Myzus nicotianae Blackman. Sugar esters included 3 types of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5de7ec9f33c9ce7ef9f9f76dd949788f
https://doi.org/10.1093/jee/90.4.1015
https://doi.org/10.1093/jee/90.4.1015
Autor:
Q. Teng, Albert W. Johnson, Maurice E. Snook, Ray F. Severson, V. A. Sisson, R.A. White, D. M. Jackson
Publikováno v:
Journal of Agricultural and Food Chemistry. 45:2299-2308
Leaves of Tobacco Introduction TI-165 were found to be resistant to tobacco budworm [Heliothis virescens (F.)] attack. HPLC profiles of leaf extracts showed that TI-165 had relatively high levels o...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cbd226ed6e4963d941186a6d77ddc72e
https://doi.org/10.1021/jf960748u
https://doi.org/10.1021/jf960748u
Publikováno v:
Journal of Agricultural and Food Chemistry. 44:1551-1557
New types of sucrose esters have been synthesized and shown to be potent insecticides against sweet potato whiteflies. On the basis of the structures of natural sucrose esters isolated from various Nicotiana species and which were shown to be potent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa95d15a2e8b0ee79d70452ee0932aad
https://doi.org/10.1021/jf950615t
https://doi.org/10.1021/jf950615t
Publikováno v:
Journal of agricultural and food chemistry. 55(5)
Flavonoid profiles of 12 zoysiagrass (Zoysia spp.) cultivars sampled six times in 1998 were correlated to fall armyworm (Spodoptera frugiperda J. E. Smith) larval weights and survival on replicated field-grown plant material and analyzed to determine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1326d84964c51668ffcf208610b16112
https://pubmed.ncbi.nlm.nih.gov/17288435
https://pubmed.ncbi.nlm.nih.gov/17288435
Autor:
Albert W. Johnson
Publikováno v:
Crop Science. 36:1406-1406
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78d7c77fbf2c1578cd17f7fa16ada2ef
https://doi.org/10.2135/cropsci1996.0011183x003600050054x
https://doi.org/10.2135/cropsci1996.0011183x003600050054x