The generalist phytoseiid mite Cydnodromus californicus (McGregor) (Mesostigmata Phytoseiidae) is considered a very importantbiocontrol agent of the spider mite Tetranychus urticae Koch both in greenhouses and field. Its capacity to feed alternativefoods allows the increase of the population in field, even when the primary prey is not available. To investigate the effect of variousalternative food substances present in the Mediterranean agroecosystems on the biological parameters of C. californicus, laboratorytrials were carried out using 17 pollens and 3 preys. As it was expected, T. urticae was the best food for both the postembryonicdevelopment and the oviposition rate (100% of attained adulthoods and 2.65 eggs/female/day were laid). Good resultswere obtained also with pollens of Carpobrotus edulis (L.) and Scrophularia peregrina L.: on both pollens, 84% of eggs reachedthe adulthood and the oviposition rate was 2.00 and 1.81 eggs/female/day for the two pollens respectively. Interesting results wereobtained with the alternative prey Petrobia hartii (Ewing), very common on Oxalis spp., a weed widespread in Mediterranean orchards(72% of attained adulthoods and 0.57 eggs/female/day). On the other hand, the effect of Mentha piperita L. was not positiveon the juvenile development (only 28% of eggs reached the adulthood), while it was positive on the oviposition rate (1.12eggs/female/day).
|Numero di pagine||6|
|Rivista||Bulletin of Insectology|
|Stato di pubblicazione||Published - 2009|
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