[Perspectives for mass rearing of Iphiseiodes zuluagai Denmark & Muma (Acari: Phytoseiidae)]. / Perspectivas para a criação massal de Iphiseiodes zuluagai Denmark & Muma (Acari: Phytoseiidae).

Iphiseiodes zuluagai Denmark & Muma is an important predator of Brevipalpus phoenicis (Geijskes) on citrus in Brazil. The suitability of Tyrophagus putrescentiae (Schrank) as a food source of I. zuluagai in laboratory rearing was investigated at 25.5 +/- 0.5 masculineC, 88 +/- 7% RU and photophase of 12h. Initially, levels of oviposition of the predator fed on eggs were evaluated, as well as the dead or live post-embryonic stages of T. putrescentiae, in a period of 10 days. The daily oviposition rate was 1.3 egg per female when they were fed on eggs on T. putrescentiae, 0.7 egg per female when they were fed on dead post embryonic stages and about 0.3 egg per female when they were fed on live post-embryonic stages. Later, the life table of I. zuluagai was constructed, when eggs of T. putrescentiae were offered to the predators as prey. The immature stages were observed every 8h, to determine the corresponding durations. In the adult phase, the mites were observed every 24h, to determine the reproductive parameters. The intrinsic rate of natural increase (r m) was 0.11 female/ female/day; resulting in a finite rate of increase of 1.11 (l). The net reproductive rate (R0) was 7.1 females/generation, with a mean generation time (T) 18.6 days. The results show that T. putrescentiae is a favorable food source for the development of I. zuluagai.

Ácaros em produtos armazenados comercializados em supermercados e feiras livres da cidade do Recife / Mites in stored foods commercialized in supermarkets and markets in Recife

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°C e umidade relativa de 78 por cento 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.

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 sub-samples. One of them was submitted to spider mite evaluation shortly after collection and the other was incubated at 26°C and 78 percent humidity for 30 days. At the end of this period the second sub-sample 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.