Ronald Ochoa

Mites (Acari) for pest control.

Introduction History and current work the Acari Illustrated keys to ABA families Treatment of individual families Introduction, culture and establishment Sex ratio of ABAs and its effect on mass--rearing, establishment and field performance Influence of host plants and host pests on the efficacy of ABAs Mutual interference between ABAs and natural enemies of ABAs The effect of pesticides on ABAs Acarine biocontrol agents as predators Attributes of efficient ABAs and demonstrating their efficacy Environmental constraints in the use of ABAs Economics and commercial aspects Recommendations for future work References Glossary.

The Family Tarsonemidae in Costa Rica (Acari: Heterostigmata)

ABSTRACT The following 16 new species, two new genera and a new subgenus of the Family Tarsonemidae are described and illustrated: Daidalotarsonemus limonensis spec. nov., Daidalotar-soenemus ternifoliae spec. nov., Dendroptus irregularis spec. nov., Floridotarsonemus edule spec. nov., Neodendroptus gen. nov., Neodendroptus perseae spec. nov., Spinatarsonemus gen. nov., Spinatarsonemus alajuelensis spec. nov., Spinatarsonemus costarricensis spec. nov., Spinatarsonemus parsoni spec. nov., Tarsonemella (Paratarsonemella) ramirezi subgen. nov., spec. nov., Tarsonemus solengrandis spec. nov., Tarsonemus pseudokennedyi spec. nov., Steneotarsonemus comosus spec. nov., Steneotarsonemus kruseae spec. nov., Xenotarsonemus gordoni spec. nov., Xenotarsonemus camarae spec. nov. and Xenotarsonemus vargasi spec. nov. In all, 32 species are treated. Notes on field characteristics, host symptomatology and relationships with other pathogens are mentioned. Keys to the genera and species of Tarsonemus found in Costa Rica ar...

The genus Tuckerella in Costa Rica (Acari: Tuckerellidae)

Abstract Four species of the family Tuckerellidae were collected from Costa Rica. These were: Tuckerella elegans Rossi de Simons, Tuckerella knorri Baker & Tuttle, Tuckerella ornata (Tucker) and Tuckerella pavoniformis (Ewing). Tuckerella knorri was found to be the most important agricultural pest. A key to the species of Tuckerella found in Costa Rica is presented.

The genus Brevipalpus in Costa Rica (Acari: Tenuipalpidae)

Abstract New species of false spider mite are described and illustrated: Brevipalpus ortizi sp. n. and Brevipalpus pseudostriatus sp. n. A key to species of Brevipalpus found in Costa Rica is presented.

A new species of Steneotarsonemus (Acari: Tarsonemidae) and an illustrated key to grass-infesting species in the Western Hemisphere

Abstract A new species, Steneotarsonemus brasiliensis, is described and illustrated. An illustrated key is presented to separate adult, males and females of Steneotarsonemus spp. (Acari: Tarsonemidae), known to occur on gramineous plants (Poaceae) in the Western Hemisphere. Information on their hosts and distribution is included.

A note on paedogenesis in Tetranychoidea

Abstract Paedogenesis is known to occur in the Acari. This note reports a new case of paedogenesis in Tuckerella knorri Baker & Tuttle (Tetranychoidea: Tuckerellidae).

Rediscovery and redescription of Tenuipalponychus tabebuiae (Acari: Tetranychidae)

ABSTRACT The rediscovery of Tenuipalponychus tabebuiae Aguilar, Flechtmann & Ochoa is reported and is redescribed from the Brazilian type material and additional specimens from Costa Rica.