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1.
Neotrop. entomol ; 39(3): 360-364, May-June 2010. tab
Article in Portuguese | LILACS | ID: lil-556520

ABSTRACT

Several annual and perennial crops are severely attacked by mites from the family Eriophyidae, Tenuipalpidae and Tetranychidae. A suitable alternative commonly used in several countries for the control of these pest mites involve the use of predatory mites in the family Phytoseiidae. The phytoseiid fauna in the Brazilian natural vegetation is very rich, but nothing is known about the biology of most of these species, as it is the case with Proprioseiopsis cannaensis (Muma). The objective of this study was to determine biological parameters of P. cannaensis fed on pest mite species such as Phyllocoptruta oleivora (Ashmead) (Eriophyidae), Brevipalpus phoenicis (Geijskes) (Tenuipalpidae) and Tetranychus urticae Koch (Tetranychidae). To enable a comparison for different food sources, one of the treatments consisted of pollen from Typha angustifolia L. The study was conducted in the laboratory at 25 ± 1ºC, 80 ± 10 percent RH and Photophase of 12h. Proprioseiopsis cannaensis did not complete the development when it was fed on P. oleivora. Its fecundity was very low with all other food sources (maximum of 3.3 eggs/female with pollen of T. angustifolia). The values of r m for P. cannaensis were -0.05, -0.09 and 0.002 when fed on B. phoenicis, T. urticae and pollen respectively. The unsatisfactory results from the four types of food sources do not permit us to conclude that P. cannaensis utilizes mites from the family Eriophyidae, Tenuipalpidae, Tetranychidae or pollen from different plant species as principal sources of food in nature.


Subject(s)
Animals , Acari/growth & development , Food , Life Cycle Stages
2.
Neotrop. entomol ; 35(4): 563-565, July-Aug. 2006. ilus
Article in Portuguese | LILACS | ID: lil-451260

ABSTRACT

Acaros Pyemotidae são relatados como ectoparasitos de grande número de artrópodes, principalmente de insetos. Estes ácaros são freqüentemente encontrados atacando insetos em diferentes habitats, inclusive em criações de laboratório. Relata-se neste trabalho a ocorrência de Pyemotes sp., grupo ventricosus, em criações da traça-do-tomateiro, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), da traça-das-farinhas, Anagasta kuehniella (Zeller) (Lepidoptera: Pyralidae), e do gorgulho-do-milho, Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae), no laboratório de criação de insetos da ESALQ-USP, em Piracicaba, SP, inclusive causando dermatites nas pessoas envolvidas com as criações. Este é o primeiro registro do parasitismo de Pyemotes sp. em lagartas de T. absoluta e larvas de S. zeamais. Pelo fato de estes ácaros causarem dermatites em seres humanos, demonstrada por outros autores, o uso direto da espécie de Pyemotes encontrada neste trabalho para o controle dos insetos citados possa não ser promissor.


Pyemotidae mites have been reported as ectoparasites of a large number of arthropods, especially of insects. These mites are frequently found attacking insects in different habitats, including insect rearing. This paper reports the occurrence of Pyemotes sp., ventricosus group, in colonies of Tuta absoluta (Meyerick) (Lepidoptera: Gelechiidae), Anagasta kuehniella (Zeller) (Lepidoptera: Pyralidae) and Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae), in the insect rearing laboratory of ESALQ-USP, in Piracicaba, State of São Paulo, provoking dematitis in those involved with the rearing. This is the first report of a Pyemotes species parasitizing T. absoluta and S. zeamais. Considering the capacity of Pyemotes to cause dermatitis in human beings, demonstrated by other authors, the direct use of the Pyemotes species found in this work for the control of the reported insect species may not be promising.


Subject(s)
Animals , Acari , Animals, Laboratory/parasitology , Lepidoptera/parasitology , Weevils/parasitology
3.
Neotrop. entomol ; 33(5): 547-555, Sept.-Oct. 2004. graf, tab, ilus
Article in English | LILACS | ID: lil-512826

ABSTRACT

Avaliou-se neste estudo a diversidade de ácaros Rhodacaroidea em amostras de folhedo e solo coletadas em ecossistemas conhecidos como “Mata Atlântica” e “Cerrado” do estado de SãoPaulo. O total de 969 Rhodacaroidea adultos foi coletado, 913 na Mata Atlântica e 56 no Cerrado. Foram encontrados representantes de três famílias de Rhodacaroidea: Ologamasidae, Rhodacaridae eDigamasellidae. Ologamasidae foi a mais numerosa na Mata Atlântica, enquanto Rhodacaridae foi a mais numerosa no Cerrado. Os Rhodacaroidea de ambos ecossistemas representaram 12 gêneros deOlogamasidae, dois de Rhodacaridae e um de Digamasellidae. O total de 13 gêneros foi encontrado em amostras de folhedo e sete em amostras de solo da Mata Atlântica. Os gêneros mais comuns neste ecossistema foram Neogamasellevans Loots & Ryke e Ologamasus Berlese, em folhedo, e Rhodacarus Oudemans, em solo. Foram coletadas 31 morfoespécies, sendo Rhodacarus sp.1, Neogamasellevanssp.1 e Neogamasellevans sp.6 as mais abundantes. Foram encontrados três gêneros de Rhodacaroidea em cada substrato do Cerrado, Rhodacarus e Rhodacarellus Willman sendo os mais abundantes. Das cinco morfoespécies encontradas neste ecossistema, a mais abundante foi Rhodacarus sp.1. Asmorfoespécies coletadas na Mata Atlântica apresentaram mais alta eqüitabilidade na freqüência de ocorrência quando comparadas àquelas do Cerrado, especialmente em amostras de folhedo. As espécies de planta amostradas na Mata Atlântica foram divididas em dois grupos distintos, de acordo com as morfoespécies de Rhodacaroidea a elas associadas: 1) Astrocaryum aculeatissimum (Schott), Bactris setosa Mert. e Attalea dubia (Mert.); e 2) Syagrus romanzoffiana (Cham.) e Euterpe edulis Mert.


This study was conducted to evaluate the diversity of rhodacaroid mites in litter and soil samples from “Mata Atlântica” and “Cerrado”, e ecosystems of the state of São Paulo, Brazil. A total of 969 adult rhodacaroids were collected, 913 in the Mata Atlântica and 56 in the Cerrado. Representativesof three rhodacaroid families were from: Ologamasidae, Rhodacaridae and Digamasellidae. Most numerous groups were ologamasids in the Mata Atlântica and rhodacarids in the Cerrado. Mites from both ecosystems represented 12 genera of Ologamasidae, two of Rhodacaridae and one of Digamasellidae.A total of 13 genera were found in litter samples and seven in soil samples of Mata Atlântica. The most common genera in this ecosystem were Neogamasellevans Loots & Ryke and Ologamasus Berlese in litter, and Rhodacarus Oudemans in soil samples. Thirty-one morphospecies were recovered, the most abundant being Rhodacarus sp.1, Neogamasellevans sp.1 and Neogamasellevans sp.6. Threerhodacaroid genera were found in each substrate of Cerrado, the most abundant being Rhodacarus and Rhodacarellus Willman. Of the five morphospecies found in this ecosystem, the most abundant was Rhodacarus sp.1. Morphospecies collected in Mata Atlântica displayed a higher equitability in frequency of occurrence than those of Cerrado, especially in litter samples. The plant species sampled in Mata Atlântica comprised two distinct groups in terms of the rhodacaroid morphospecies associated with them: 1) Astrocaryum aculeatissimum (Schott), Bactris setosa Mart. and Attalea dubia (Mart.); and 2)Syagrus romanzoffiana (Cham.) and Euterpe edulis Mart.

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