Search results for " Entomologia"

How to escape from insect egg parasitoids: A review of potential factors explaining parasitoid absence across the Insecta: Escape from insect egg par…

2020

The egg is the first life stage directly exposed to the environment in oviparous animals, including many vertebrates and most arthropods. Eggs are vulnerable and prone to mortality risks. In arthropods, one of the most common egg mortality factors is attack from parasitoids. Yet, parasitoids that attack the egg stage are absent in more than half of all insect (sub)orders. In this review, we explore possible causes explaining why eggs of some insect taxa are not parasitized. Many insect (sub)orders that are not attacked by egg parasitoids lack herbivorous species, with some notable exceptions. Factors we consider to have led to escape from egg parasitism are parental egg care, rapid egg deve…

Egg parasitoids of stink bugs: Research status and potential for biological control

2012

Egg parasitoids are among the most important natural enemies associated with herbivorous stink bugs, and they show remarkable potential as biological control agents. On the other side, some egg parasitoid species also attack predaceous bugs, thus affecting the efficacy of these important entomophagous insects. Most studied stink bug egg parasitoids belong to Platygastridae (=Scelionidae) and Encyrtidae, the main research topics concerning behavior, chemical ecology, behavioural ecology and field efficacy. Some species have been used for biological control programs. However, some constraints may prevent egg parasitoids from becoming effective agents in inundative biocontrol projects, the mos…

First record in Algeria of two eulophid wasps: Closterocerus chamaeleon (Girault) and its host, the eucalyptus gall wasp Ophelimus maskelli (Asmead) …

2010

The endophagous parasitoid Closterocerus chamaeleon, released in Israel, Italy and Corsica, for classical biological control programs, and its host, the gall-maker Ophelimus maskelli, were recorded for the first time in Algeria, in a straight line 450 km far from the Sardinian release site and 700 km far from the closest Sicilian release site. Their presence is confirmed in Andalucia (Spain), about 2000 km far from release sites of Sicily and Campania. In about two years the parasitoid spread and was established in many Mediterranean countries.

New or interesting records of Palearctic Orthoptera (Insecta).

2010

The author reports some interesting Orthoptera from Palearctic region, namely: Pezodrymadusa subinermis Karabag, 1961, Phytodrymadusa viridipennis (Shchekanovtsev, 1915), Paranocarodes sulcatus (I. Bolivar, 1912) from Armenia, Scintharista notabilis notabilis (Walker, 1870) from Azores, Brachycrotaphus tryxalicerus (Fischer, 1853) from Egypt, and Euchorthippus declivus (Brisout, 1848) from Sardinia (Italy). Additionally, he establishes the synonymies Eupholidoptera peneri Kaltenbach, 1969 = Uvarovistia rammei Katbeh Bader et Massa, 2001 from Jordan; Stenobothrus ursulae Nadig, 1986 = S. nadigi La Greca, 1986 from Piedmont and Aosta Valley (Italy); Pterolepis pedata A. Costa, 1882 = Rhacocle…

FIRST RECORD IN TUNISIA OF CLOSTEROCERUS CHAMAELEON (GIRAULT) PARASITOID OF THE EUCALYPTUS GALLWASP OPHELIMUS MASKELLI (ASHMEAD) (Hymenoptera Eulophi…

2010

Closterocerus chamaeleon (Girault) (Hymenoptera Eulophidae), parasitoid of the Eucalyptus gall wasp Ophelimus maskelli (Ashmead) (Hymenoptera Eulophidae) has been recorded for the first time in Tunisia in July 2007. This record suggests that 14 months after its release in Sicily, in May 2006, it has spread over Sicily Channel.

First Record of Leptocybe invasa and Ophelimus maskelli Eucalyptus Gall Wasps in Tunisia

2010

Two Australian gall wasps were detected for the first time in Tunisia on the foliage of Eucalyptus camaldulensis trees. Leptocybe invasa was detected in 2004, while Ophelimus maskelli in 2006. L. invasa makes galls on petioles, leaf midribs and young branches whereas O. maskelli induces galls on limbs. Vigilance is recommended when seedlings are carried to plantation.

EFFICACIA DI ARGILLE E PRODOTTI SISTEMICI NEL CONTROLLO DI OPHELIMUS MASKELLI (ASHMEAD) SU SEMENZALI DI EUCALYPTUS CAMALSULOENSINS DEHN.

2009

INTERRELAZIONI TRA L’ARTROPODOFAUNA DELL’AGRUMETO E QUELLA DELLA SUA FLORA SINANTROPICA: OSPITI DELLE SPECIE DI RATZEBURGIOLA ERDÖS 1958 (HYMENOPTERA…

1997

Olive Seed Wasp in Cultivated Olives. Possible threat.

2020

The possible threat to cultivated olives due to some Chalcidoidea seed wasps are here highlighted, showing symptoms, identification and seasonal occurrence

Olive seed wasps (Hymenoptera: Chalcidoidea), potentially important pests of olive crops in the Western Cape of South Africa

2019

Most phytophagous insects on cultivated olives, Olea europaea L. subsp. europaea var. europaea, in South Africa are native and come from the local wild olive tree, Olea europaea subsp. cuspidata. This paper presents the first qualitative and comparative data regarding the phytophagous seed wasps on cultivated and wild olives. From 2009 to 2012, 62 random fruit samples were collected from untreated cultivated olive trees and 53 random fruit samples from wild olives at 13 different localities in the Western Cape. During spring 2013 and summer 2014, olives collected from the trees were dissected with a scalpel (when the pit was still soft) in search of seed wasp eggs and young larvae or cut wi…