Diseases of mites and ticks: farewell to Leo van der Geest.- Diseases of mites and ticks: from basic pathology to microbial control—an introduction.- Using RNA interference to determine the role of varisin in the innate immune system of the hard tick Dermacentor variabilis (Acari: Ixodidae).- Silencing expression of the defensin, varisin, in male Dermacentor variabilis by RNA interference results in reduced Anaplasma marginale infections.- Potential effects of mixed infections in ticks on transmission dynamics of pathogens: comparative analysis of published records.- An association between the Antarctic mite Alaskozetes antarcticus and an entomophthoralean fungus of the genus Neozygites.- Diversity of acaropathogenic fungi in Poland and other European countries.- Entomopathogenic fungi against South American tick species.- Pathogenicity and thermotolerance of entomopathogenic fungi for the control of the scab mite, Psoroptes ovis.- Impact of two treatments of a formulation of Beauveria bassiana (Deuteromycota: Hyphomycetes) conidia on Varroa mites (Acari: Varroidae) and on honeybee (Hymenoptera: Apidae) colony health.- Topically applied myco-acaricides for the control of cattle ticks: overcoming the challenges.- Protection of Metarhizium anisopliae conidia from ultra-violet radiation and their pathogenicity to Rhipicephalus evertsi evertsi ticks.- Evaluation of Metarhizium anisopliae (Deuteromycota: Hyphomycetes) for control of broad mite Polyphagotarsonemus latus (Acari: Tarsonemidae) in mulberry.- Enabling mycelial application of Hirsutella thompsonii for managing the coconut mite.- A tale of three acaropathogenic fungi in Israel: Hirsutella, Meira and Acaromyces.- Lessons from interactions within the cassava green mite fungal pathogen Neozygites tanajoae system and prospects for microbial control using Entomophthorales.- Failure of the mite-pathogenic fungus Neozygites tanajoae and the predatory mite Neoseiulus idaeus to control a population of the cassava green mite, Mononychellus tanajoa.- The effects of Pseudomonas putida biotype B on Tetranychus urticae (Acari: Tetranychidae).- Overwintering and prevalence of Neozygites floridana (Zygomycetes: Neozygitaceae) in hibernating females of Tetranychus urticae (Acari: Tetranychidae) under cold climatic conditions in strawberries.- Sprays of emulsifiable Beauveria bassiana formulation are ovicidal towards Tetranychus urticae (Acari: Tetranychidae) at various regimes of temperature and humidity.- Role of entomopathogenic fungi in the control of Tetranychus evansi and Tetranychus urticae (Acari: Tetranychidae), pests of horticultural crops.- Effect of temperature on virulence of Beauveria bassiana and Metarhizium anisopliae isolates to Tetranychus evansi.- Side-effects of pesticides on the life cycle of the mite pathogenic fungus Neozygites floridana.- Natural enemies of mass-reared predatory mites (family Phytoseiidae) used for biological pest control.- Verified and potential pathogens of predatory mites (Acari: Phytoseiidae).- Symbionts, including pathogens, of the predatory mite Metaseiulus occidentalis: current and future analysis methods.