Abstract
Earth mites are pests of crops and pastures in southeastern Australia.Recent studies show differences between earth mite species in their mode ofreproduction, preferred hosts and pesticide tolerance. This paper examines thedistribution and pest status of each species. The southeastern Australiandistribution for each species is mapped, incorporating new data from easternNewSouth Wales, South Australia and Tasmania. A new population of an undescribedspecies previously identified from northwestern Victoria was found in northernNew South Wales. CLIMEX was used to identify climatic factors limiting thedistribution of P. major and P.falcatus, the most broadly distributed species. This analysissuggests tolerance to heat and desiccation limits the inland distribution ofthese two species. A three-year survey of agricultural outbreaks indicates thatall Penthaleus species are major agricultural pestsalthough their pest status on crop types appears to differ. All speciescontributed to chemical control failures. However P.falcatus, previously identified in laboratory tests as havingincreased tolerance to pesticides, was the most common species associated withcontrol failures. A laboratory experiment indicated that mites are sometimespests on crops on which they cannot persist for a generation. Results arediscussed with respect to management of these agricultural pests.
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Robinson, M.T., Hoffmann, A.A. The pest status and distribution of three cryptic blue oat mite species (Penthaleus spp.) and redlegged earth mite (Halotydeus destructor) in southeastern Australia. Exp Appl Acarol 25, 699–716 (2001). https://doi.org/10.1023/A:1016375219330
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DOI: https://doi.org/10.1023/A:1016375219330