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Enzyme activity of an eriophyoid “salivary” secretion: preliminary report on polygalacturonase
No full textSaggi preliminari per lo studio della sopravvivenza degli acari eriofioidei a condizioni di stress potenzialmente correlate alla dispersione aerea
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Direct collection of eriophyoid (Acari: Eriophyoidea) salivary secretions and their preliminary bio-chemical assays
No full textLa saliva degli acari Eriophyoidea: messa a punto di un metodo di indagine e risultati preliminari
No full text«Salivary secretions» of eriophyoids (Acari: Eriophyoidea): first results of an experimental model
No full textThis paper concerns an approach to direct collection of eriophyoid ‘salivary secretions’,
and reports preliminary results on biological assays providing evidence for the presence of plant
growth promoting substances in these secretions. Eleven species belonging to the Phytoptidae,
Eriophyidae and Diptilomiopidae, characterized by different host–plant interactions, were studied
by immersing mites into the following oils: condensate of cedar oil, oil for immersion lenses, two
kinds of olive oil, a-terpineol, hystolemon, vaseline oil, and soybean oil. Some species secreted small
droplets of lipophobic substances at the tip of their mouthparts when they were immersed in
objective lens oil. Mite mortality and percentage of secreting specimens depended on the species and
the medium used. Aceria caulobia (Nalepa) was selected as the candidate for subsequent study,
because this species displayed a higher percentage of secreting mites than the other species and
numerous specimens were easily collected by means of an airflow and filtering device. The induced
secretions were studied from January to June of 2000, 2001 and 2002. Rapid salivary bioassays were
performed during the period of maximum induced secretion in 2001. They were evaluated using a
wheat-coleoptile and an excised-radish-cotyledon growth test, respectively, for indole-3-acetic acidlike
and cytokinin-like activity. The bioassays suggested the presence of chemicals with plant growth
regulatory effects. A brief account of eriophyoid mortality in the oils was also given
Eriophyidae on Brassicaceae: a new species of Metaculus from Turkey and remarks on the brassicaceous associated species
No full textPopulations of eriophyoid mites infesting Brassicaceae were surveyed and two species belonging to the genus Metaculus
Keifer were found in an attempt to find enemies of some brassicaceous weeds in Turkey. A new species, Metaculus lepidifolii
n. sp., was collected on Lepidium latifolium L., commonly known as broadleaved or perennial pepperweed, manifesting
leaf curling and deformation. In addition, Metaculus rapistri Carmona, was collected and redescribed from Isatis
tinctoria L., dyer’s woad, as a new host record and report for the Turkish fauna. This species also causes leaf deformation.
A key to all known species of Metaculus found worldwide is provided. Because only a few eriophyoid species have been
recorded on brassicaceous vegetables and weeds so far and the mite taxonomy appears to be confusing, remarks are given
about the current state of knowledge. The new genus combination for Aculops lepidii is also given
Eriophyoid mites (Acari: Prostigmata: Eriophyoidea) from the Maltese Islands (Central Mediterranean): new reports and a preliminary check-list
No full textIn the 20th Century, about 20 species of eriophyoids were listed for the Maltese Islands but these reports
were entirely based on plant gall surveys. In these last four years, plant collections were made in order to
investigate the species of eriophyoids present in Malta and Gozo. Most of the earlier reports have been
confirmed and eight species were found to be new for the Maltese islands: Aceria caulobia (Nalepa) gall-making
on Suaeda vera Gmelin; Aceria onychia (Nalepa) on Phlomis fruticosa L.; Aceria sheldoni (Ewing) on lemon; Aculus
tetanothrix (Nalepa) gall-making on Salix sp.; Cecidophyopsis hendersoni (Keifer) on yucca; and three species
associated with olive, Ditrymacus athiasella Keifer, Oxycenus maxwelli (Keifer) and Tegolophus hassani ( Keifer).
Additional remarks were included for Acalitus phloeocoptes (Nalepa), collected on cherry plum, whose earlier
Maltese record was doubtful. A complete morphometric description of Aceria carlinae (Nalepa) is here
provided
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