RECOGNITION OF CERTAIN KAIROMONES BY THE PARASITOID TRICHOGRAMMA SPP. IN EGGS OF IT’S HOST CYDIA POMONELLA | ||||
| Arab Universities Journal of Agricultural Sciences | ||||
| Article 19, Volume 14, Issue 2, September 2006, Page 835-844 PDF (441.1 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ajs.2006.15522 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Sakr, H.E.A.* | ||||
| Department of Plant Protection, Faculty of Agriculture, Ain Shams University, Shoubra El-Kheima, Cairo, Egypt | ||||
| Abstract | ||||
| A kairomone from adult Cydia pomonella L. scales is an important factor in the host recognition and searching behaviour process of Trichogramma cacoeciae Mar-chal and Trichogramma dendrolimi Matsumura. The Trichogramma spp. used the chemicals from the host eggs for orientation to host and increased their parasitism. The females of T. cacoeciae*, T. dendrolimi** and T. dendrolimi*** contacted the unwashed host eggs significantly longer than the washed eggs. Washing the codling moth eggs with hexan significantly reduced the parasitism of all the tested Tricho-gramma strains compared to unwashed eggs. The treated apple trees with wing scales of C. pomonella had significant influence on the parasitism compared to un-treated trees. The percentage parasitism of codling moth eggs on the treated trees (31.6%) was significantly higher than on the untreated trees (19.3%). | ||||
| Keywords | ||||
| Trichogramma cacoeciae; T. dendrolimi; Cydia pomonella; Kairomone; Wing scales; Recognition; Searching behaviour; Parasitism | ||||
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