Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Ray F. Severson"'
Volatile Chemicals from Sweet Potato and Other Ipomoea: Effects on the Behavior of Cylas formicarius
Publikováno v:
Sweet Potato Pest Management ISBN: 9780429308109
Sweet Potato Pest Management
Sweet Potato Pest Management
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9ff8e3ee522e192f138a505aa6baf5b
https://doi.org/10.1201/9780429308109-12
https://doi.org/10.1201/9780429308109-12
Publikováno v:
Sweet Potato Pest Management ISBN: 9780429308109
This chapter explores the development of a rapid bioassay technique for screening sweet potato clones for the presence of an oviposition stimulant, its isolation and identification, and its use in the development of an analytical screening technique.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf6f17225f2558e7a6c6816bc4a0bff1
https://doi.org/10.1201/9780429308109-11
https://doi.org/10.1201/9780429308109-11
Publikováno v:
CHEMOECOLOGY. 12:1-10
Field observations indicated that hornworms select feeding sites non-randomly on tobacco. We tested the hypotheses that differences in feeding site locations of larvae of Manducasexta L. and Manducaquinquemaculata (Haworth) (Lepidoptera: Sphingidae)
Publikováno v:
Journal of Chemical Ecology. 26:1-19
Tobacco plants, Nicotiana tabacum were grown under different levels of ozone (O3) in open-top chambers. Ozone concentrations were established by charcoal filtration, which reduced O3 to approximately one-half ambient, or by the addition of O3 to unfi
Autor:
Ray F. Severson, Joyce G. Latimer
Publikováno v:
Journal of the American Society for Horticultural Science. 122:788-791
Epicuticular waxes were analyzed to explain the visible differences in the waxy bloom of conditioned broccoli (Brassica oleracea L. Group Italica `Green Duke') transplants. Seedlings (22 days old) were subjected to brushing (40 cycles per minute, 1 m
Publikováno v:
Journal of Agricultural and Food Chemistry. 45:3914-3920
An earlier paper on the nonpolar lipids of Amaranthus palmeri described the compositions of the saturated fatty alcohol and wax ester components of the leaves and flowering parts. In this paper, the compositions of esters containing unsaturated acyl
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...
Publikováno v:
The Canadian Entomologist. 129:61-69
Cylas formicarius (F.) shows a strong overall sexual monomorophism, with external differences noted in only three organs: (a) relative size of the hind wings; (b) form of the antennal club and numbers of its different types of sensillum; and (c) size
Publikováno v:
Environmental Entomology. 26:101-105
Compared with the laboratory colony females, 1st-generation feral (wild F1) females of the tobacco budworm, Heliothis virescens (F.), produced little sex pheromone unless exposed to a host plant. Pheromone production in wild F1 females was induced by
Autor:
Gary J. Puterka, Ray F. Severson
Publikováno v:
Journal of Economic Entomology. 88:615-619
Insecticidal activity of a sugar ester fraction isolated from leaf trichomes of wild tobacco, Nicotiana gossei Domin, to egg, nymph, and adult stages of pear psylla, Cacopsylla pyricola Foerster, was determined in replicated laboratory bioassays. Aqu