Danni da infestanti inusuali a insetti essiccati e raccolte entomologiche

Translated title of the contribution: [Autom. eng. transl.] Damage from unusual weeds to dried insects and entomological collections

Rinaldo Nicoli Aldini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

[Autom. eng. transl.] Biotic adversities of primary importance for the preservation of naturalistic heritage such as zoological and entomological collections, the most common infestations of dry-preserved insects are, as is known, Coleoptera Dermestidi and Psogiotteri Trogiidi and Liposcelididi. In the absence of effective means of prevention and defense, they can also compromise materials of considerable scientific value. The incidence of weeds different from those just mentioned is clearly smaller, generally negligible and little known. The present contribution wants to make known some cases of damage to insects, preserved for different reasons, caused by more or less unusual weeds for this type of organic substrate. Blattodei Blattidi: Blatta orientalis Linné. Damage from B. orientalis has been observed several times on lepidoptera in preparation on drying racks and already dried, not adequately protected. The attack resulted in the removal, more or less extensive, of parts of the insect, above all but not only the abdomen. The coarseness of the damage, denoting the action of strong jaws, left no doubt on the causal agent, whose episodic incursions into a preparation laboratory were ascertained with the occasional observation of excrement, nymphs and adults. Lepidoptera Pyralids: Plodia interpunctella (Hübner). The occasional larval zoonecrophagy on various small dried and preserved insects, on which the species has been able to complete the entire development, has been ascertained in massed samples coming from trays for the collection of electro-insecticidal light traps and preserved for research reasons. Plodia larvae have shown a tendency to consume, more or less extensively, above all the Musca abdomen (Diptera Muscidi), probably due to the characteristics of the food content. Coleoptera Anobiidi: Lasioderma serricorne (Fabricius). Sometimes attacks of L. serricorne have been observed, with some damage and completion of the entire development, to insects in preparation or dried (eg. Ascalafidi Neuroptera) and placed in entomological boxes probably already infested. Sometimes instead the presence of living larvae of the anbiid has been observed, with abundant traces of trophic activity, in sealed envelopes containing dry insects from electro-insecticidal traps, preserved for research reasons. Tenebrionid Coleoptera: Tribolium sp. The development of Tribolium on dry insects (eg Fasmodei Fasmidi) preserved in entomological cassettes has been found, though rarely. The infestation also in this case must have begun earlier, in the preparation-drying phase. The development involved only a few specimens, with limited damage. The presence of heterogeneous infested biological materials, passing through an entomological laboratory for research reasons and stored at room temperature, favored the occurrence of part of the episodes described, all observed by the extender of this note. The food spectrum of the entities in question is more or less broad but, apart from the case of B. orientalis, which tends to be omnivorous, the larvae of Plodia, Lasioderma and Tribolium infest materials of plant origin much more commonly. From the present findings indirectly derive indications not so much for the preservation of preserved insects (for example the use of freezers), but rather for the correct management of electro-insecticide traps in food industries, in order to avoid the establishment of outbreaks of infestation (circumstance well note with reference to the Dermestides) also by the unusual entities reported. The attitude of certain phytophagous insects of the foodstuffs to occasional zoonecrophagia would deserve experimental investigations into possible correlations between the diet of attacked and damaged insects, the content of their digestive tract and the attractiveness exerted on pests.
Translated title of the contribution[Autom. eng. transl.] Damage from unusual weeds to dried insects and entomological collections
Original languageItalian
Title of host publicationAtti del XXV Congresso Nazionale Italiano di Entomologia
Pages345
Number of pages1
Publication statusPublished - 2016
EventCongresso Nazionale Italiano di Entomologia - Padova
Duration: 20 Jun 201624 Jun 2016

Conference

ConferenceCongresso Nazionale Italiano di Entomologia
CityPadova
Period20/6/1624/6/16

Keywords

  • Blatta
  • Lasioderma
  • Plodia
  • Tribolium
  • damage
  • dannosità
  • dried insects
  • insetti conservati

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