Browsing by Author "Herz, A."
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- Acção dos predadores em largadas inundativas de Trichogramma cacoecia Marchal (Hymenoptera: Trichogrammatidae), contra a traça da oliveira, Prays oleae Bernard (Lepidoptera: Yponomeutidae).Publication . Pereira, J.A.; Bento, Albino; Cabanas, J.E.; Torres, L.; Herz, A.; Hassan, Sherif Ali
- Ants as predators of the egg parasitoid Trichogramma cacoeciae (Hymenoptera: Trichogrammatidae) applied for biological control of the olive moth, Prays oleae (Lepidoptera: Plutellidae) in PortugalPublication . Pereira, J.A.; Bento, Albino; Cabanas, J.E.; Torres, L.; Herz, A.; Hassan, Sherif AliThe detrimental effect of predators on Trichogramma cacoeciae March. releases to control the olive moth, Prays oleae Bern., in the Trás-os-Montes region (Northeast of Portugal), was evaluated during three releases against the flower generation of the pest in 2002. At 1 and 3 h and at 1, 3, 7 and 14 days after each release, 30 Trichogramma releasing cards were examined in the field and predators were collected and identified. Furthermore, at 1, 3, 7 and 14 days after each release, the percentage of egg predation on the cards was also determined. Formicidae were the most abundant group of predators at 99.1% of the total individuals collected. Ten species were identified, Camponotus aethiops, C. lateralis, C. piceus, C. truncatus, Crematogaster auberti, C. scutellaris, Lasius niger, Leptotorax angustulus, Plagiolephis pygmaea and Tapinoma nigerrimum. T. nigerrimum was the most abundant species, both in total numbers as well as in the number of occupied cards. One day after release, the percentage of predation was 24.0% in the first release, 59.4% in the second and 38.0% in the third. Three days after release, the percentage of predation varied from 60.2 to 83.4% during the three release events. Seven days after release, the percentage of predation increased to 97.8% of the total eggs on cards.
- Effects of different attractive sources on the abundance of Hymenoptera and possible enhancement of their activity on Prays oleae Bern.Publication . Bento, Albino; Cabanas, J.E.; Pereira, J.A.; Torres, L.; Herz, A.; Hassan, Sherif Ali
- Effects of different attractive sources on the abundance of olive predatory arthropods and possible enhancement of their activity as predators on eggs of Prays oleae Bern.Publication . Bento, Albino; Cabanas, J.E.; Pereira, J.A.; Torres, L.; Herz, A.; Hassan, Sherif Ali
- 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.
- Influence of natural vegetation on soil arthropods on olive tree in the north of Portugal.Publication . Pereira, J.A.; Pereira, I.; Santos, Sónia A.P.; Bento, Albino; Herz, A.; Torres, L.
- Inquérito sobre a protecção fitossanitária do olival biológicoPublication . Torres, L.; Pereira, J.A.; Bento, Albino; Herz, A.
- 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