Search results for "Bactrocera oleae"
showing 10 items of 11 documents
A Metabarcoding Survey on the Fungal Microbiota Associated to the Olive Fruit Fly.
2017
The occurrence of interaction between insects and fungi is interesting from an ecological point of view, particularly when these interactions involve insect pests and plant pathogens within an agroecosystem. In this study, we aimed to perform an accurate analysis on the fungal microbiota associated to Bactrocera oleae (Rossi) through a metabarcoding approach based on 454 pyrosequencing. From this analysis, we retrieved 43,549 reads that clustered into 128 operational taxonomic units (OTUs), of which 29 resulted in the “core” associate fungi of B. oleae. This fungal community was mainly represented by sooty mould fungi, such as Cladosporium spp., Alternaria spp. and Aureobasidium spp., by pl…
IL CONTROLLO DI BACTROCERA OLEAE ( ROSSI )E DI ALTRI CARPOFAGI NEGLI OLIVETI BIOLOGICI IN SICILIA E SUD AFRICA
2011
OLIVE FRUIT FLY: A threat to the South African olive industry?
2015
Olive fruit fly (Bactrocera oleae) is the most serious pest of cultivated olives in the Mediterranean basin. to date we have not seen the same level of damage in south africa, but the question remained whether it poses a similar threat as the local olive industry expands. From this study it is clear that the climatic con- ditions during the period preceding harvest are un- favourable for rapid population growth of OFF in the Western Cape, in contrast to conditions in the coastal area of Trapani province in Sicily. Climate, and not parasitism, appears to be the main factor limiting OFF population levels in the Western Cape. While sporadic outbreaks of economically damaging OFF infestations c…
Insects and fungi: ecological interactions and functional biodiversity
The effect of distance between parasitoid and host on the parasitism of Psyttalia concolor (Szépligeti) in organic olive orchards
2013
Bactrocera oleae (Rossi) is a major pest of olive fruits. Biological control of olive fruit fly mainly relies on the activity of the Braconid species Psyttalia concolor (Szépligeti), which parasitizes Bactrocera oleae at the larval stage. Parasitism tests have been carried out at the insect growing facility (insectariums) of the Mediterranean Agronomic Institute of Bari (C.I.H.E.A.M.). The critical point of the use of P. concolor as a biological control agent in organic olive crop is the assessment of its effectiveness against B. oleae. Its lower presence in fruits of cultivated olives rather than in small fruits of wild olives suggests an influence of the size of the fruit, and of the thic…
È possibile il biologico per le olive da mensa?
2017
La frontiera dell’olivicoltura biologica da mensa passa attraverso il controllo della mosca delle olive in aree pandacie a forte pressione del dittero. In queste aree è di grande ausilio l’irrigazione, che facendo raggiungere prima la pezzatura desiderata, consente di sfuggire in parte alle più dannose infestazioni d’inizio autunno; in assenza d’irrigazione, spesso le drupe, all’arrivo delle piogge, aumentano in volume insieme alle infestazioni. I mezzi di controllo suggeriti sono quasi totalmente volti a evitare l’attacco, mediante l’uccisione degli adulti (catture massali o “attract and kill”) o la repellenza (argille e composti del rame); se si esclude l’uccisione delle larve di prima …
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…
Quanta infestazione di mosca possiamo tollerare?
2022
In questo articolo sono riportati i sorprendenti risultati dei pochi recenti articoli scientifici che indicano la soglia di tolleranza della mosca delle olive per l'ottenimento di olio. In caso di raccolte precoci e medie, con estrazione entro le 24 ore, si possono ottenere oli extravergini d'altà qualità anche con 43-44% di fori d'uscita di Bactrocera oleae This article reports the surprising results of the few recent scientific papers that indicate the tolerance threshold of olive fly for obtaining oil. In case of early and medium harvests, with extraction within 24 hours, high quality extra virgin olive oils can be obtained even with 43-44% exit holes of Bactrocera oleae
Il controllo degli insetti fitofagi nell'olivicoltura biologica.
2016
Puntuali strategie di controllo, campionamenti personalizzati e maggiore consapevolezza entomologica, insita nell’approccio del coltivatore biologico, consentono ottimi risultati quali-quantitativi ed economici nella difesa fitosanitaria in olivicoltura “organica” e in qualsiasi area olivicola italiana. Le minori spese fitosanitarie rispetto all’olivicoltura convenzionale inducono un sempre maggior numero di produttori alla conversione verso il bio. Gli autori illustrano le metodologie ammesse e consigliabili in regime di agricoltura biologica, per il controllo dei principali insetti fitofagi del olivo nel Mediterraneo, con particolare riferimento alla mosca delle oilve, Bactrocera oleae, e…
Control of Bactrocera oleae by low environmental impact methods: NPC methodology to evaluate the efficacy of lure-and-kill method and copper hydroxid…
2011
The NonParametric Combination (NPC) methodology is proposed to verify the influence of the lure-and-kill method, using Ecotraps (Vioryl SA), on the distribution of Bactrocera oleae (Rossi) (Diptera Tephritidae) infestation in olive groves, and the integration of this method with copper hydroxide sprayings. This approach does not require the verification of any rigid assumption as many parametric methods do. Results of field trials indicate a strict relationship among the efficiency of the lure-and-kill method on time, dimension of the field, and population density of the olive fly. Moreover, the lure-and-kill method alone seems insufficient to provide an efficient control of the olive fly p…