Morfologia do testículo e espermatogênese em Telchin licus (Drury, 1773) (Lepidoptera: Castiniidae)

• Autor(a) principal: Pereira, Monique Campos [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/139341
• topic: Lepidoptero; Espermatogenese; Testiculos; Morfologia (Biologia); Broca (Inseto); Spermatogenesis

Telchin licus (Drury, 1773) (Lepidoptera: Castniidae) is a sugarcane crop pest known as giant sugarcane borer. In Brazil the production of sugar and alcohol is considered one of the main activities of the national economy. Despite the economy importance of sugarcane to the country, large amount of sugarcane production is lost because of damage caused by insect pests. The giant sugarcane borer is widespread in an area about 320 thousands of hectares and can affect from 20% to 60% of the production where it occurs, causing losses up to R$ 34,5 million each harvest. In the larval stage this insect can causes huge losses for crop and because of your body size it is known as giant borer. It can mention podridão vermelha among the main damages caused by fungi that enter in the hollow open by the larvae in sugarcane, thus decreasing the sugar and alcohol production. The expansion of knowledge about the reproduction biology of this insect has become a requirement to support research on the development and improvement of control methods to this pest and faced with we set out to characterize morphologically the testis and investigate the formation process of male gametes (spermatogenesis) in this specie. The Lepidopteran order has the dichotomous spermatogenesis with the production of eupyrene and apyrene sperm (nucleate and enucleated). In this study it was made the morphological and ultrastructural description of T. licus testis and the characterization of different spermatogenesis steps and the characterization of the two sperm types. It was used larvae and adults to the research. The spermatogenesis process can be organized and characterized in six steps (spermatogonia, spermatocyte, early spermatid, young spermatid, late spermatid and sperm), resulting in two sperm types, the eupyrene and apyrene ones