Browsing by Author "Youssef, A."
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- Egg parasitoids of the genus Trichogramma (Hymenoptera, Trichogrammatidae) in olive groves of the Mediterranean regionPublication . Herz, A.; Hassan, Sherif Ali; Hegazi, Esmat Mohamed; Khafagi, Wedad Emam; Nasr, Feeby N.; Youssef, A.; Agamy, Essam A.; Blibech, Imen; Ksentini, I.; Ksantini, M.; Jardak, Taieb; Bento, Albino; Pereira, J.A.; Torres, L.; Souliotis, C.; Moschos, T.; Milonas, P.A survey of egg parasitoids of the genus Trichogramma (Hymenoptera, Trichogrammatidae) was carried out in olive groves in Portugal, Greece, Egypt, and Tunisia during the years 2002–2004. Parasitoids were obtained either by exposing sentinel eggs (Sitotroga cerealella Olivier or Ephestia kuehniella Zeller) on olive trees or by collecting eggs of lepidopterous olive pests. Parasitized egg samples were reared separately in the laboratory for emergence of parasitoids. These were further reared in separate lines and processed by morphological and molecular biology techniques for species characterization. The recorded fauna of Trichogramma parasitoids in olive groves was species poor and consisted of species mainly known from the Mediterranean region. Trichogramma bourarachae Pintureau and Babault was found in Tunisia and Egypt, T. cordubensis Vargas and Cabello, and T. euproctidis Girault in Egypt, Trichogramma cacoeciae Marchal in Portugal, Greece, Egypt, Tunisia and Trichogramma nerudai Pintureau and Gerding in Portugal. Apart from that, Trichogramma oleae Voegele´ and Pointel was collected in Tunisia. This species is probably not indigenous, but has established after several releases of a French strain were made in recent years. For selected strains, the sequence of the internal transcribed spacer 2 (ITS-2) region of rDNA was determined and deposited in the GenBank database. Differences in important biological attributes were found among collected strains of T. bourarachae, suggesting the existence of biotypes. The results contribute to the limited knowledge on distribution and biodiversity of the genus Trichogramma in the Mediterranean region. They can be helpful for the preservation and use of indigenous Trichogramma species in biological control of lepidopterous pests in olive and other local crops.
- Prospects for sustainable control of Lepidopterous olive pests by pheromones and egg parasitoids.Publication . Herz, A.; Hassan, Sherif Ali; Hafez, B.; Hegazi, Esmat Mohamed; Nasr, Feeby N.; Youssef, A.; Agamy, Essam A.; Jardak, Taieb; Ksantini, M.; Konstantopoulou, Maria A.; Mazomenos, Bassilios E.; Torres, L.; Bento, Albino; Pereira, J.A.
- Prospects to use releases of the egg parasitoid Trichogramma (Hymenoptera, Trichogrammatidae) for biological control in olive cultivation – lessons from the EU-project “Triphelio“.Publication . Herz, A.; Hassan, Sherif Ali; Hegazi, Esmat Mohamed; Hafez, B.; Nasr, Feeby N.; Youssef, A.; Agamy, Essam A.; Jardak, Taieb; Ksantini, M.; Konstantopoulou, Maria A.; Mazomenos, Bassilios E.; Broumas, T.; Milonas, P.; Moschos, T.; Souliotis, C.; Torres, L.; Pereira, J.A.; Bento, Albino
- Survey of native Trichogramma-species in the olive grove ecosystem.Publication . Herz, A.; Hassan, Sherif Ali; Hegazi, Esmat Mohamed; Hafez, B.; Nasr, Feeby N.; Youssef, A.; Agamy, Essam A.; Jardak, Taieb; Ksantini, M.; Broumas, T.; Milonas, P.; Moschos, T.; Souliotis, C.; Torres, L.; Pereira, J.A.; Bento, Albino
- Triphelio – an international research project for sustainable control of lepidopterous pests in olive groves.Publication . Agamy, Essam A.; Bento, Albino; Hafez, B.; Hassan, Sherif Ali; Hegazi, Esmat Mohamed; Herz, A.; Jardak, Taieb; Ksantini, M.; Konstantopoulou, Maria A.; Mazomenos, Bassilios E.; Nasr, Feeby N.; Pereira, J.A.; Torres, L.; Youssef, A.The olive moth (Prays oleae, Lepidoptera: Plutellidae) is known as one of the key pests in olive cultivation. In particular areas, also the jasmine moth (Pal pita zmionalis, Lepidoptera: Pyralidae) can cause serious damage to both leaves and fiuits of the olive tree. Both pests are mainly controlled by insecticide applications. In November 200 I, an international research project was started to promote biological and biotechnical methods for the control of these pests.