| Autor: |
Tóth, Miklós, Ujváry, István, Sivcev, Ivan, Imrei, Zoltán, Szarukán, István, Farkas, Orsolya, Gömöry, Ágnes, Gács-Baitz, Eszter, Francke, Wittko |
| Předmět: |
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| Zdroj: |
Entomologia Experimentalis et Applicata; Feb2007, Vol. 122 Issue 2, p125-132, 8p |
| Abstrakt: |
During our screening studies, attractiveness of a ternary mixture of synthetic Grandlure I [racemic cis-1-methyl-2-(1-methylenethenyl)-cyclobutane ethanol], Grandlure II [( Z)-2-(3,3-dimethyl)cyclohexylidene ethanol], and Grandlure III–IV [( Z)- and ( E)-2-ochtodenal; ( Z)- and ( E)-(3,3-dimethyl)cyclohexylidene acetaldehyde] for the sugar-beet weevil, Bothynoderes punctiventris Germar (Coleoptera: Curculionidae), was observed in field-trapping tests at several sites in Hungary and Serbia. The mixture attracted both males and females. Later tests revealed that of the components in the ternary mixture, only Grandlure III–IV were responsible for attraction, and the addition of Grandlures I or II in varying percentages had no influence on trap captures. Traps baited with 50–50 000 µg of Grandlure III–IV on rubber or polyethylene dispensers yielded high catches of weevils. When testing synthetic samples enriched in the respective geometrical isomer, Grandlure IV had a tendency of catching more weevils, but differences were not significant from lower catches by a 1:1 Z: E blend or Grandlure III. In gas chromatography–flame ionization detection/electroantennographic detection studies, antennae of both female and male weevils were more responsive to the ( E)- than to the ( Z)-isomer suggesting a more important role for Grandlure IV. Efforts to verify the presence of Grandlure III or IV in volatiles collected from either sex of live sugar-beet weevils or body washings with pentane remained inconclusive. Traps baited with Grandlure III–IV can now be used as sensitive and powerful trapping tools in the control of the sugar-beet weevil. [ABSTRACT FROM AUTHOR] |
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