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      Observaciones sobre la biologia y comportamiento del acaro Macrodinychus sellnicki (Mesostigmata: Uropodidae) ectoparasitoide de la hormiga loca Paratrechina fulva (Hymeaoptera: Formicidae)1 Translated title: Observations on the biology and behavior of the mite Macrodinychus sellnicki (Mesostigmata: Uropodidae), ectoparasite of the crazy ant Paratrechina fulva (Hymenoptera: Formicidae)

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          Abstract

          La "hormiga loca" Paratrechina fulva (Mayr) ha encontrado en el cultivo de cana de azucar las condiciones adecuadas para establecerse y proliferar, lo que ha ocasionado serios problemas al sector. En 1996, se detecto en el Ingenio Risaralda la presencia de un acaro atacando las pupas de la hormiga; diversas investigaciones condujeron a elucidar su biologia, comportamiento y otras relaciones existentes entre el acaro y la hormiga, en orden a determinar la posibilidad de usar el acaro como agente de control de poblaciones de la hormiga loca. El acaro identificado como Macrodinychus sellnicki (Hirschmann) es mirmecofilo y se desarrolla como ectoparasitoide de la pupa succionando los liquidos internos de ella, la cual muere al emerger el adulto. En condiciones de campo, se determino que el acaro puede presentar rangos de parasitismo entre 0 y 93%. Antes de llegar al estado adulto M sellnicki pasa por tres estados de desarrollo: larva, protoninfa y deutoninfa. La duracion de su ciclo de vida fue de 30 dias en promedio contabilizado desde larvas activas hasta la emergencia del adulto. Despues de copuladas las hembras formaron huevos a los siete dias y larvas a los 37, sugiriendo oviviparidad. No se logro observar el proceso de salida de las larvas, las cuales son moviles lo que les permite ubicar a su hospedero. Los dos estados ninfales sufren cambios regresivos en los organos locomotores. M sellnicki tiene una alta capacidad para afectar las poblaciones de P. fulva, pero su reproduccion masiva en laboratorio no fue posible. Su uso, por lo tanto, consistiria en liberaciones inoculativas de material de campo altamente parasitado, en sectores donde se presenten explosiones de hormiga loca y el acaro este ausente.

          Translated abstract

          The crazy ant Paratrechina fulva (Mayr) has conditions found in sugarcane adequate for establishing and proliferating, causing serious problems to growers. In 1996, the presence of a mite attacking crazy ant pupae was detected in Risaralda sugar mill; several investigations were conducted to elucidate its biology, behaviour other relationships between the mite and the ant, in order to determine the possibility of using the mite as a control agent of ant populations. The mite, identify as Macrodinychus sellnicki (Hirschmann), is a myrmecophile and develops as an ectoparasitoid sucking internal fluids of the pupa, which in turn dies when the adult mite emerges. Percent parasitism by mites in the field may vary from 0 to 93%. Before becoming an adult M sellnicki passes through three development stages: larva, protonymph and deutonymph. Mean duration of the life cycle was 30 days from active larva to emerged adult. After copulation, females formed eggs 7 days later and larvae 37 days later, suggesting ovoviviparity. Birth of larvae was not observed; these are active and seek their host. Nymphal stages have regressive development of their locomotion appendages. M sellnicki has a high capacity to affect P. fulva populations but its mass reproduction in laboratory was not possible. Its potential use therefore would be inoculative, consisting of liberations of highly parasitized individuals obtained from the field into areas where there are crazy ant outbreaks but the mite is absent.

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          Most cited references 10

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                rcen
                Revista Colombiana de Entomología
                Rev. Colomb. Entomol.
                Sociedad Colombiana de Entomología (Bogotá )
                0120-0488
                December 2004
                : 30
                : 2
                : 143-149
                Affiliations
                [1 ] Universidad Nacional de Colombia Colombia
                [2 ] Cenicana Colombia
                [3 ] Universidad Nacional de Colombia Colombia
                Article
                S0120-04882004000200004
                Product
                Product Information: website
                Categories
                ENTOMOLOGY

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