Two species of eriophyoid mites (Acari, Prostigmata) in wheat cultivation (Triticum aestivum L.) and associated grass community in Wielkopolska, Poland.
Quantitative characteristics of the occurrence of eriophyoid mites on wheat and associated grasses were studied. Three groups of hosts: cultivated wheat (T. aestivum), quackgrass (Agropyron repens [Elymus repens]) in cultivation, and quackgrass in balks were analysed. Two species of eriophyoid mites were recorded: Aceria tosichella and Abacarus hystrix. Abacarus hystrix appeared more frequent (present in 65.0% of all collected samples; (95% confidence interval: 50-80)) and abundant (mean number of individuals per sample: 207.3 (94.4-351.5)) than Aceria tosichella (17.5%; (7.5-3.0), 13.8 (0.9-32.8), respectively). Significant differences in numbers among studied mite species populations on different host plants have been found. It is concluded that wheat is the marginal host for these two eriophyoids when compared to quackgrass.