Experimental & Applied Acarology

, Volume 17, Issue 11, pp 847–858 | Cite as

Characteristics of development and reproduction in Typhlodromus pyri on Tetranychus urticae and Cecidophyopsis ribis. II. Progeny of overwintered females

  • Rostislav Zemek


The results of this study on the bionomic parameters in progeny of overwintered females of Typhlodromus pyri Scheuten under constant laboratory conditions (18°C, R.H. 75%. 18L:6D) are described. The predatory mites were fed overwintering forms of two prey species, the two-spotted spider mite. Tetranychus urticae Koch and the black currant gall mite. Cecidophyopsis ribis (Westwood). The results corroborate that T. pyri is able to complete its life-cycle and reproduce when it feeds exclusively on the black currant gall mite. Juvenile development of females feeding on T. urticae and on C. ribis was 19.4 and 20.9 days respectively, while in males it was 18.4 and 17.5 days. Mortality of juveniles feeding on T. urticae was higher (33.0%) compared with that of juveniles fed on C. ribis (10.7%). The highest mortality was noted in protonymphs fed on T. urticae (21.9%). The difference between the mean total fecundity of females fed on T. urticae (16.4 eggs) and on C. ribis (17.8 eggs) was not statistically significant. Mean duration of preoviposition, oviposition and postoviposition periods were 19.1, 25.0 and 14.5 days in females fed on T. urticae and 19.7. 50.2 and 5.0 in those fed on C. ribis.


Gall High Mortality Laboratory Condition Prey Species Predatory Mite 
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Copyright information

© Science and Technology Letters 1993

Authors and Affiliations

  • Rostislav Zemek
    • 1
  1. 1.Institute of EntomologyAcademy of SciencesCeské BudějoviceCzech Republic

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