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Kairomones Used by Trichogramma chilonis to Find Helicoverpa assulta Eggs (2000)

Boo, K. S. ; Yang, J. P.

Springer

Journal of chemical ecology 26 (2000), S. 359-375

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ISSN: 1573-1561

Keywords: Trichogramma chilonis ; kairomones ; Helicoverpa assulta sex pheromone ; egg odor ; scale odor ; Ostrinia furnacalis sex pheromone

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Chemistry and Pharmacology

Notes: Abstract Chemically mediated interactions between an egg parasitoid, Trichogramma chilonis, and its host insect, Helicoverpa assulta, were studied in laboratory experiments. T. chilonis was attracted to the sex pheromone of H. assulta, and, among four components of its sex pheromone, (Z)-11-hexadecenyl acetate seemed to be most attractive. T. chilonis was also highly attracted to (E)-12-tetradecenyl acetate, a component of the sex pheromone of Ostrinia furnacalis, another host. H. assulta eggs were more parasitized by T. chilonis when the eggs were treated with male moth scale extract (MSE) of H. assulta. Parasitism was also affected by the age of the parasitoid, time of day, and MSE concentration. Silica gel chromatography and subsequent argentation chromatography for MSE fractionation indicated the activity was associated with the fraction of saturated hydrocarbons. A linear olfactometer experiment revealed that H. assulta eggs also contain a short-range attractant(s).

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1005453220792

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The influence of antimony trihalides on flammability and ignitability of polyethylene (1991)

Yang, J. P. ; Brewer, D. G. ; Venart, J. E. S.

New York, NY [u.a.] : Wiley-Blackwell

Fire and Materials 15 (1991), S. 127-130

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ISSN: 0308-0501

Keywords: Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: The flammability and ignitability of polyethylene using antimony trihalide compounds as fire retardants was evaluated by standard methods to determine retardant effectiveness. Compared with other retardants, the antimony trihalide compounds, antimony tribromide and antimony trichloride, substantially reduced both the flammability and the ignitability of the polyethylene. The influence of retardant concentration, heat flux and type of polyethylene was also studied.

Additional Material: 7 Ill.