The species of Scolytinae subfamily have a worldwide distribution, and are found mainly in the Neo-tropic regions. They usually dominate the communities of wood borer insects. The aim of the present study was to determine the diversity among Scolytinae species associated with balsa, teak, rubber and gamhar plantations located in the humid tropical zone of the Ecuadorian littoral. In each plantation seven flight interception traps containing an ethanol / gel mixture were installed, with a collection frequency of 15 days for three months in the dry period. A total of 1437 specimens were collected, represented by Xyleborini, Cryphalini, Corthylini and Ipini tribes. In the four plantations, 18 species of Scolitids were collected, of which 16 were recorded in the balsa plantation, while in the other plantations 10 to 12 species were found. The most abundant Scolitids were Hypothenemus spp., Corthylus spp., Xyleborus affinis, Xyleborinus bicornatulus and Premnobium cavipennis. The Shannon-Wiener diversity index was higher in the balsa culture (H’= 2.37) and lower in Teak (H’= 1.57). The Jaccard similarity index was higher among the teak and rubber plantations (Cj = 0.9090) while the balsa plantation obtained less similarity with respect to the other three plantations. The greatest diversity of Scolitids was recorded in the balsa plantation, which is a native species, unlike the other forest species, which are exotic, indicating that the diversity would be influenced by the host tree and the location where they are found.

T he species of Scolytinae subfamily have a worldwide distribution, and are found mainly in the Neo-tropic regions. They usually dominate the communities of wood borer insects. The aim of the present study was to determine the diversity among Scolytinae species associated with balsa, teak, rubber and gamhar plantations located in the humid tropical zone of the Ecuadorian littoral. In each plantation seven flight interception traps containing an ethanol / gel mixture were installed, with a collection frequency of 15 days for three months in the dry period. A total of 1437 specimens were collected, represented by Xyleborini, Cryphalini, Corthylini and Ipini tribes. In the four plantations, 18 species of Scolitids were collected, of which 16 were recorded in the balsa plantation, while in the other plantations 10 to 12 species were found. The most abundant Scolitids were Hypothenemus spp., Corthylus spp., Xyleborus affinis, Xyleborinus bicornatulus and Premnobium cavipennis. The Shannon-Wiener diversity index was higher in the balsa culture (H'= 2.37) and lower in Teak (H'= 1.57). The Jaccard similarity index was higher among the teak and rubber plantations (Cj = 0.9090) while the balsa plantation obtained less similarity with respect to the other three plantations. The greatest diversity of Scolitids was recorded in the balsa plantation, which is a native species, unlike the other forest species, which are exotic, indicating that the diversity would be influenced by the host tree and the location where they are found.Key words: Scolitids, diversity, balsa, teak, Ecuador, gamhar, rubber. ResumenL as especies de la subfamilia Scolytinae tienen una distribución global, abundan principalmente en el Neo trópico y dominan usualmente las comunidades de insectos barrenadores de la madera. El objetivo del presente estudio fue determinar la diversidad de las especies Scolytinae asociadas a plantaciones de balsa, teca, caucho y melina, en la zona tropical húmeda del litoral ecuatoriano. En cada plantación se instalaron siete trampas de interceptación de vuelo conteniendo una mezcla de etanol/gel, con una frecuencia de recolección de 15 días durante tres meses en el periodo seco. En total se recolectaron 1437 especímenes, representados por las tribus Xyleborini, Cryphalini, Corthylini e Ipini. En las cuatro plantaciones se colectaron 18 especies de escolítinos, de las cuales, 16 se registraron en la plantación de balsa, mientras que en las otras plantaciones se encontraron entre 10 y 12 especies. Los escolítinos con mayor abundancia fueron Hypothenemus spp., Corthylus spp., Xyleborus affinis, Xyleborinus bicornatulus y Premnobium cavipennis. El índice de diversidad de Shannon-Wiener fue mayor en el cultivo de balsa (H´=2.37) y menor en teca (H´= 1.57). El índice de similitud de Jaccard fue mayor entre las plantaciones de teca y caucho (Cj= 0,9090) mientras que la balsa obtuvo menor similitud con respecto a las tres plantaciones. La mayor diversidad de escolítinos se registró en la plantación de balsa, que es una espec...

Orange is among the first staple foods for humans. It is the most representative and recognized fruit within Citrus genus as one of the most essential Citrus locally, regionally and globally. A part of its production is consumed as fresh fruit, and another part is processed by agroindustry, whose product depends on the variety. As a global view, more than 50 % of the production of the orange crop is planted in tropical and subtropical regions. Citrus sinensis AGRIVITA

Rodríguez-Monroy, 2019). However, it is vulnerable to be attacked by Hypothenemus hampei (coffee bit), which infects the green developed fruits, red (mature) and dry ones (Abate,