1,721,048 research outputs found
Acari Eriophyoidea: alcune caratteristiche rilevanti per il controllo biologico delle piante infestanti.
No full textThe main morphological, biological and ecological aspects making the Eriophyoid mites highly effective against the weedy plants are briefly reviewed. Obstacles and interferences for correct species identification and survey are summarized. Challenging research topics requiring further deep investigations are pointed out
Preventative approach to microbial control of capnodis tenebrionis by soil application of metarhizium brunneum and beauveria bassiana
Full text linkManagement of the Mediterranean flat-headed root-borer, Capnodis tenebrionis, is critical due to the larvae’s root localization. Neonate larvae can be exposed to natural enemies before penetrating the roots. Application of Metarhizium brunneum strain Mb7 and Beauveria bassiana strain GHA formulations on rice granules was investigated for their efficacy against C. tenebrionis larvae. Mb7 application, evaluated on apricot twigs, significantly and dose-dependently reduced colonization rates of neonates, with highest mortality at 108 conidia/g soil. Neonate susceptibility to Mb7 and GHA was evaluated on potted rootstocks (GF677 almond × peach, 2729 plum) planted in entomopathogenic fungi (EPF)-premixed soil (1.3–1.6 × 105 conidia/cm3 soil) or in EPF-free soil surface-treated with 5 g Mb7 fungal granules (1.25 × 109 conidia). Larval colonization rates were reduced 7.4-fold in 2729 by both fungi; only Mb7 completely prevented colonization of GF677 by larvae. Larvae inside plant galleries exhibited mycosis with EPF-treated soils and both fungi proliferated on larval frass. Mb7 conidia germinated in the rhizosphere of GF677, and conidia of both fungi remained viable throughout the trial. Galleria baiting technique was used on EPF-treated soil to evaluate EPF infectivity over time; Mb7 and GHA persisted 180 and 90 days post inoculation, respectively. The formulation (fungus-covered rice grains), delivery method (mixing with soil) and persistence (3–6 months) of Mb7 and GHA are feasible for potential field application to control C. tenebrionis
Phytoseiid mites (Acari: Mesostigmata) from Apulia (Southern Italy), with a key to the species reported from Italy
No full textThe objective of this paper is to provide a taxonomic appraisal of the phytoseiids mainly from Apulia, Italy, through the examination of 1055 specimens collected in the areas of that district. Reports of occasional collection in Basilicata and Molise areas are also listed (16 specimens). The mite specimens were collected on the main cultivated and ornamental plants, and on spontaneous plants as well. Complementing the morphological characterization of the species collected is provided. This is the first wide report survey on the phytoseiid fauna in Apulian territories. This study reports on nine new records of Phytoseiidae for Apulia region (Southern Italy). Typhlodromus (Typhlodromus) exhilaratus Ragusa was the most frequent or abundants species sampled. Also, some other species, i.e. Phytoseiulus persimilis Athias-Henriot and Amblyseius swirskii Athias-Henriot, were collected and are potential taxa for biocontrol. In addition, a dichotomous key to separate phytoseiid mite species listed from Italy was provided
Attuali conoscenze degli Eriofioidei vettori di Virus.
No full textOnly a small number of diseases have been confirmed to be caused by virus species transmitted by eriophyid mites; many others have uncertain aetiology and the involvement of a virus is suspected. Many eriophyid species produce symptoms which may be confused with viral diseases or hide virus infections not identified yet. The development of biotechnologies and their continuous updating and improvements could allow a larger detection of virus entities. The purpose of the present review is to describe the current state of knowledge on the eriophyid and plant virus interactions pointing out the weak points of these investigations
Controllo biologico del Capnodis tenebrionis (buprestide delle rosacee). Note preliminari
No full text
Colomerus vitis (Acari: Trombidiformes: Eriophyoidea): some morphometric, biomolecular and biological aspects comparing deutogyne versus protogyne forms.
Full text linkEriophyoid mites overwinter by a winter form (deutogyne) morphologically distinct from the spring-summer form (protogyne). Deutogyne is well distinct and known for a part of eriophyoids. Grapevine erineum mite, Colomerus vitis (Pagenstecher), is widespread in the main world viticultural areas, was recently demonstrated vector Grapevine pinot gris virus. Its females overwinter mainly under outer scales of buds and a deutogyne was described but not perfectly distinct from the protogyne.
A morphometric, biomolecular and biological approach was applied in order to better characterize deutogynes versus protogynes. Buds or leaves of Luisa infested by C. vitis were sampled 6 times from the same vineyard between December 2015 and January 2017. Females were studied for about 70 traits commonly used for taxonomic identification. Kruskal-Wallis test was applied for the measured populations. ITS1 was investigated in individuals collected from buds (winter) and erinea (spring). Groups of protogynes and deutogynes were separately submerged in water or vaseline, at 5/25±1°C, and mite survival was assessed every week/day, respectively. Data were analyzed by regression analysis.
Length of foreleg seta l’ and hindleg seta ft’, and numbers of smooth dorsal semiannuli were significantly different between protogynes and deutogynes. ITS1 analysis confirmed the homogeneity of these populations. The study demonstrated the presence of population composed by protogynes and deutogynes in July and September 2016. In April and May 2016 were collected only protogynes, whereas in December 2015 and January 2017 were collected only deutogynes, as expected. Deutogynes showed a higher survival than the protogynes in all experimental conditions
Eriophyoid (Trombidiformes: Eriophyoidea) mite fauna of Miandoab region in Iran with redescription of Aceria kiefferi (Nalepa)
Full text linkDuring the study of the eriophyoid mite fauna of Miandoab region (West Azerbaijan province, Iran), specimens of two eriophyoid families, four subfamilies, four tribes, 11 genera and 19 species were collected and identified. Among them, three species including Aceria kiefferi (Nalepa), Phyllocoptes bilobospinosus Chetverikov and Diptacus gigantorhynchus (Nalepa) were recorded for the first time in Iran. The most abundant species was Acalitus phloeocoptes (Nalepa) and six other species including Aceria cf. tosichella Keifer, A. anthocoptes (Nalepa), Calepitrimerus baileyi Keifer, Aculus fockeui (Nalepa &Trouessart), Abacarus cf. hystrix (Nalepa) and Rhynophytoptus nemalobos Lotfollahi &de Lillo were abundant species in the surveyed region. The old species, A. kiefferi is redescribed and illustrated herein, according to the current standard, due to the poor details of the previous old descriptions
- …
