Capacidad de transmisión de los organismos asociados a la enfermedad “Muerte Regresiva” en Tectona grandis L.f. (teca) por insectos de la subfamilia Scolytinae en dos zonas de la región Litoral del Ecuador.

Tectona grandis L.f., is a forest species found in countries such as India, Myanmar, Lao People's Democratic Republic and Thailand, Costa Rica, Trinidad and Tobago, Panama, El Salvador, Cuba, Guatemala, Colombia, Venezuela, Brazil, Peru, Bolivia and Ecuador; in recent years in Ecuador a pathology has been observed whose symptoms are attributed to the disease known as Regressive Death”. In the plantations, perforations in the stem have also been observed, which are caused by boring insects of the order Coleoptera. There is a group of insects of the Scolytidae subfamily known as Ambrosia beetles, they are called vectors that carry the spores of the fungus in their exoskeleton. Its food is the bark of the wood, sapwood, heartwood and ragweed fungi, the present study aims to: To determine the transmission capacity of organisms associated with the disease "dieback" by insects Scolytinae in the Litoral region of Ecuador. The research was developed in two phases: phase one was carried out in two commercial teak plantations located in the cantons of Balzar and Buena fe, where three sentinel-type traps were placed in each plantation, suspended 1.50 m high from the base of the shaft where they remained for thirty days. This activity was carried out either at the National Agricultural Research Institute of the Pichilingue Tropical Experimental Station within the facilities of the Department of Plant Protection. The microorganisms present were isolated from both the exoskeleton and the hemolymph of the Scolytinae insects captured in the sentinel traps. Fusarium spp, Lasiodiplodia sp and Ceratocystis sp.; from the exoskeleton and hemolymph of the (Scolytinae) it was possible to isolate: Fusarium spp and Lasiodiplodia sp. Based on the statistical analyzes carried out, the plantation located in the Buena Fe canton obtained the highest number of organisms, both in sentinel traps and insects, the predominant organism in the Exoskeleton and Hemolymph was the genus Fusarium spp and the lowest was Lasiodiplodia sp. The results of this work will serve as a baseline study to determine the dispersal capacity of this phytosanitary problem. Keyword: scolithin, exoskeleton, hemolymph.

• Autor principal: Castro Castro, Jonathan Gabriel (author)
• Format: bachelorThesis
• Idioma: spa
• Publicat: 2021
• Matèries: Escolitinos; Exoesqueleto; Hemolinfa
• Accés en línia: https://repositorio.uteq.edu.ec/handle/43000/6321