Abstract

RODRIGUEZ SANTANA, Ioan A et al. Nocividad de los insectos de la familia Scarabaeidae asociados a las plantaciones de guayabo (Psidium guajava Lin.). cultrop [online]. 2016, vol.37, suppl.1, pp. 57-63. ISSN 1819-4087.

This research was conducted in the Basic Unit of Cooperative Production (UBPC) “Wilber Segura” belonging to the Empresa Agroindustrial Ceballos, in the period from 12 to 20 March 2012. The evaluated items were the basis for determining the harmfulness of insects associated Scarabaeidae plantations guava (Psidium guajava Lin.) with the implementation of a management that ensures appropriate plant increased life and crop yield; for this the number of larvae that affect the root system of the plant and a diagnostic methodology was designed to assess the involvement caused by beetles was examined. The results show that there is a relationship between the number of larvae m^-2 in the root system of each plant, with symptoms manifested in leaf area compared to a loss of pigment chlorophyll and carotenoids increased. As you increase the degree of damage, increases the number of larvae m-2, plants grade 0 reached three larvae/m^-2, the grade 1 from 4 to 16 larvae m^-2, grade 2 from 17 to 30 larvae m^-2, grade 3 from 31 to 34 larvae m^-2 and grade 4 from 35 to 37 larvae m^-2. A increasing the degree of damage decreases the number of total and green leaves, and increases the number of leaves affected. The mass of roots branches and decreases as the number of larvae m-2 increases

Keywords : beetles; root eating insects.

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