Mites as Selective Fungal Carriers in Stored Grain Habitats

Hubert, Jan; Stejskal, V.; Kubátová, Alena; Münzbergová, Zuzana; Váňová, M.; Žd'árková, E.

doi:10.1023/a:1024271107703

Cited by 76 publications

(35 citation statements)

References 4 publications

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“…Contudo, Matsumoto et al (1998) Hubert et al (2003) verificaram que além de o aumento da umidade relativa propiciar o desenvolvimento de ácaros, como para A. siro e T. putrescentiae, também favorece a proliferação de fungos que lhes servem de alimento.…”

Section: Resultsunclassified

Ácaros em produtos armazenados comercializados em supermercados e feiras livres da cidade do Recife

Sousa¹,

Gondim²,

Barros³

et al. 2005

Neotrop. Entomol.

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-The mite fauna was assessed in bean, maize and pet food in supermarkets and markets in Recife, PE, Brazil. A 500 g sample of each grain and food was collected in each establishment at two weekly intervals, from August 2002 to June 2003. The sample was divided into two 250 g subsamples. One of them was submitted to spider mite evaluation shortly after collection and the other was incubated at 26 o C and 78% humidity for 30 days. At the end of this period the second subsample was processed in the same way as the first. The spider mites were mounted on slides for microscopy in Hoyer medium and identified at least at genus level. Eleven thousand nine hundred and fifty-six spider mites were collected belonging to the Acaridae, Ebertiidae, Glycyphagidae, Cheyletidae, Stigmaeidae, Pyemotidae, Tarsonemidae, Tydeidae, Cunaxidae, Ameroseiidae, Ascidae e Phytoseiidae families. Among the primary spider mites the Suidasia medanensis Oudemans species was predominant in the survey (3,035 individuals) followed by Caloglyphus hughesi (Samsinak) (436 individuals). Metapronematus sp. was predominant (3,417 individuals) among the secondary spider mites followed by Tarsonemus granarius Lindquist (3,003). The number of mites collected in the incubated samples was always greater compared to the non-incubated samples in both the market and supermarket samples.KEY WORDS: Acari, stored product, diversity RESUMO -Este trabalho teve como objetivo avaliar a acarofauna em grãos de feijão, milho e ração em supermercados e feiras livres da cidade do Recife, PE. Em cada estabelecimento foi coletada uma amostra de 500 g de cada grão e ração, em intervalos bimensais, no período de agosto/2002 a junho/ 2003. Cada amostra foi dividida em duas sub-amostras de 250 g. Uma delas foi submetida à extração de ácaros logo após a coleta e a outra foi incubada a 26 o C e umidade relativa de 78% por 30 dias. Ao final desse período a segunda sub-amostra foi processada da mesma forma que a primeira. Os ácaros foram montados em lâminas para microscopia em meio de Hoyer e identificados pelo menos até o nível de gênero. Foram coletados 11.956 ácaros pertencentes às famílias Acaridae, Ebertiidae, Glycyphagidae, Cheyletidae, Stigmaeidae, Pyemotidae, Tarsonemidae, Tydeidae, Cunaxidae, Ameroseiidae, Ascidae e Phytoseiidae. Dentre os ácaros primários, a espécie Suidasia medanensis Oudemans foi a predominante no levantamento (3.035 indivíduos), seguida de Caloglyphus hughesi (Samsinak) (436 indivíduos). Metapronematus sp. foi predominante (3.417 indivíduos), dentre os ácaros secundários, seguido de Tarsonemus granarius Lindquist (3.003). O número de ácaros coletados nas amostras incubadas foi sempre superior em relação às amostras não incubadas, assim como nas amostras de feira livre em relação às de supermercado. PALAVRAS-CHAVE: Acari, grãos armazenados, diversidade O ambiente artificial criado pelos depósitos e armazéns de grãos armazenados favorece o desenvolvimento de diversas espécies de ácaros, visto que a proteção contra extremos de temperatura permite ...

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Section: Resultsunclassified

Ácaros em produtos armazenados comercializados em supermercados e feiras livres da cidade do Recife

Sousa¹,

Gondim²,

Barros³

et al. 2005

Neotrop. Entomol.

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“…The mite infestation decreases food safety because mites are allergen producers (van Hage-Hamsten and Johansson 1992) and transmit mycotoxin-producing fungi (Franzolin et al 1999;Hubert et al 2003). Traditional management of stored-product mites relies on chemical acaricides on good husbandry.…”

Section: Introductionmentioning

confidence: 99%

In vitro and in vivo inhibition of α-amylases of stored-product mite Acarus siro

et al. 2005

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The stored-product mites are the most abundant and frequent group of pests living on the stored food products in Europe. They endanger public health since they produce allergens and transmit mycotoxin-producing fungi. Novel acaricidal compounds with inhibitory effects on the digestive enzymes of arthropods are a safe alternative to the traditional neurotoxic pesticides used for control of the stored-product pests. In this work, we explored the properties of acarbose, the low molecular weight inhibitor of alpha-amylases (AI), as a novel acaricide candidate for protection of the stored products from infestation by Acarus siro (Acari: Acaridae). In vitro analysis revealed that AI blocked efficiently the enzymatic activity of digestive amylases of A. siro, and decreased the physiological capacity of mite's gut in utilizing a starch component of grain flour. In vivo experiments showed that AI suppressed the population growth of A. siro. The mites were kept for three weeks on experimental diet enriched by AI in concentration range of 0.005 to 0.25%. Population growth of A. siro was negatively correlated with the content of AI in the treated diet with a half-population dose of 0.125%. The suppressive effect of AIs on stored-product mites is discussed in the context of their potential application in GMO crops.

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“…In the Czech Republic, for example, mites are the most dominant and frequent arthropod group in stored grain, infesting 65% of grain samples . Mites produce allergens and transmit mycotoxin-producing fungi (van Hage-Hamsten and Johansson, 1998;Hubert et al, 2003). Acarus siro (Acari: Acaridida: Acaridae) is the most serious mite pest in grain stores (Thind and Clarke, 2001;Stejskal et al, 2003).…”

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Ultrastructure of the digestive tract in Acarus siro (Acari: Acaridida)

Šobotník

Alberti

Weyda

et al. 2007

Journal of Morphology

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The gut of the mite Acarus siro is characterized on the ultrastructural level. It consists of the foregut (pharynx, esophagus), midgut (ventriculus, caeca, colon, intercolon, postcolonic diverticula, postcolon), and hindgut (anal atrium). The gut wall is formed by a singlelayered epithelium; only regenerative cells are located basally and these have no contact with the lumen. Eight cell types form the whole gut: (i) simple epithelial cells forming fore-and hindgut; (ii) cells that probably produce the peritrophic membrane; (iii) regenerative cells occurring in the ventriculus, caeca, colon, and intercolon; (iv) spherite cells and (v) digestive cells forming the ventriculus and caeca; (vi) colonic cells and (vii) intercolonic cells; and (viii) cells forming the walls of postcolonic diverticula and postcolon. Spherite and digestive cells change in structure during secretory cycles, which are described and discussed. The cycle of spherite, colonic, and intercolonic cells is terminated by apoptosis. Ingested food is packed into a food bolus surrounded by a single homogeneous peritrophic membrane formed by addition of lamellae that subsequently fuse together. The postcolonic diverticula serve as a shelter for filamentous bacteria, which also are abundant in the intercolon.

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Mites as Selective Fungal Carriers in Stored Grain Habitats

Cited by 76 publications

References 4 publications

Ácaros em produtos armazenados comercializados em supermercados e feiras livres da cidade do Recife

Ácaros em produtos armazenados comercializados em supermercados e feiras livres da cidade do Recife

In vitro and in vivo inhibition of α-amylases of stored-product mite Acarus siro

Ultrastructure of the digestive tract in Acarus siro (Acari: Acaridida)

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