Alvaro E. EIRAS*-1, Peter WITZGALL-2,
C. Rikard UNELIUS-3, Marie BENGTSSON-2,
Aadecio KOVALESKI-4. Evaldo F. VILELA-5, Anna-Karin
BORG-KARLSON-3, Jean P. CHAMBON-6.
1-Setor Semiquímcos, LPP-CCTA, Universidade Estadual do Norte
Fluminense, Campos, RJ, 28045-620, Brazil;
2-Swedish Unhersity of Agricultural Sciences, Alnarp, Sweden
3-Royal Institute of Technology, Stockholm, Sweden;
4-CNPUV/Embrapa, Vacaria, Brazil;
5-Universidade Federal de Vi,cosa, Brazil;
6-INRA, Versailles, France.
The leaf roller, Bonagota (Phtheochroa) cranacdes Meyr., is the most important lepidopteran pest of apple orchards in southern of Brazil. The larvae shelter between the fruit and leaves and are therefore difficult to control by insecticides. Monitoring of the seasonal flight period will increase the efficacy of such treatments. Traps baited with live virgin females have been used successfully, but the development of a synthetic lure is required for routine applications. The pheromonal compounds produced by B. cranaodes females were identified by chemical analysis (GC/MS) and electroantennography (GC/EAD). The main compound, (E,Z)-3,5-dodecadienyl acetate has been identified for the first time in family Tortricidae. Traps baited with 100 µg (E,Z)-3,5-dodecadienyl acetate were attractive over 15 weeks in the field and were as effective as baited traps.
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