Abstract

BALTAZAR CASTANEDA, Hernán et al. Morphological description and damage characterization of Eurysthea sordida (Erichson) (Coleoptera: Cerambycidae) on Alnus acuminata Kunth (Betulaceae) from Mantaro Valley, Junin Region, Peru. Cienc. Tecnol. Agropecuaria [online]. 2023, vol.24, n.2, e2986.  Epub Aug 31, 2023. ISSN 0122-8706.  https://doi.org/10.21930/rcta.vol24_num2_art:2986.

Eurysthea sordida (Erichson) (Coleoptera: Cerambycidae) is a coleopteran of tropical distribution in South America that causes damage of economic importance on Alnus acuminata Kunth in the Mantaro Valley, Junín region, Peru. In the region, there is no complete study of its life cycle and the damage it causes to Alnus acuminata. Therefore, the aim of this research was to study the morphology of the biological stages of E. sordida on A. acuminata, as well as to characterize the damage caused by E sordida. For this, the total length (L) and width (W) of eggs, larvae, pupae and adults of E. sordida were measured, as well as the diameter of the perforations in the bark and sapwood of A. acuminata. Additionally, a complete morphological description of the biological stages of E. sordida to confirm its taxonomic identification was performed. A complete morphological description of the egg, larval and adult pupal stages of E. sordida was carried out and its taxonomic identity was confirmed. Six larval stages were observed with the following parameters, I (2.518 ± 0.421 mm), II (6.228 ± 1.858 mm), III (15.961 ± 2.752 mm), IV (23.048 ± 1.581 mm), V (28.301 ± 1.170 mm), and VI (33.055 ± 1.412 mm). All the specimens of A. acuminata evaluated were attacked by E. sordida individuals, showing slight to very severe damage from the base to the mid-shaft, in the bark, cambium and sapwood. This research is the first report on the biological stages of E. sordida and on the damage to the bark and sapwood of A. acuminata for the Mantaro Valley.

Keywords : Betulaceae; damage; life cycle; plants pests; taxonomy; high valleys.

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