Resumo

DE LA PENA, ADRIANA et al. Effect of Different Times of Cold Storage on Some Parameters of Phytoseiulus persimilis (Athias Henriot) and Neoseiulus californicus. (Parasitiformes: Phytoseiidae). Acta biol.Colomb. [online]. 2011, vol.16, n.2, pp.63-74. ISSN 0120-548X.

The predatory mites Phytoseiulus persimilis Athias-Henriot and Neoseiulus californicus are used in programs of mass rearing for the control of phytofagous mites. The effect on survival, longevity, predator capacity and fecundity of this predators was studied after storage them to a temperature of 8 °C and relative humidity of 85+/-5 % during different periods of time (0, 7, 14, 21, 28 y 35 days). During the time of evaluation the predators were individualized and kept at 25 °C of temperature and relative humidity of 85+/-5 %. The survival, longevity predator capacity and fecundity presented during all the time of evaluation of P. persimilis displayed a decrease after being stored during 21 o more days, the same happened to the survival and consumption of N. californicus sp. However, the longevity and oviposition during all time of evaluation for N. californicus was reduced after storing them for 28 o more days. Daily consumption and daily fecundity of both predators had no effect, except on daily consumption of eggs for P. persimilis and daily consumption of nymphs for N. californicus after storing them for 35 days.

Palavras-chave : predator mites; cold storage; mass rearing; consumption; oviposited eggs; survival.

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