Ocorrência e danos de Hybolabus amazonicus Voss e Hybolabus columbinus (Erichson) (Coleoptera: Attelabidae) em castanheira, na Região Amazônica

Abstract

Occurrence and Damage of Hybolabus amazonicus Voss and Hybolabus columbinus (Erickson) (Coleoptera: Attelabidae) on Brazil nut, in the Amazon Region ABSTRACT-The occurrence of Hybolabus amazonicus Voss and Hybolabus columbinus (Erickson) damaging leaves of the Brazil nut (Bertholietia excelsa, Lecythidaceae) is reported. Adults fed on the surface of the leaves causing damage, and females cut and rolled the young leaves for nest construction. Injuries were more visible in young plants than in old ones.

Description of larva and pupa of the weevil Hybolabus amazonicus Voss (Attelabidae: Attelabinae), a leaf roller on Brazil nut (Bertholletia excelsa)

“…One to 14 adults were observed emerging from a single nidus. When the infestation is high, these weevils can cause serious damages, more pronounced in younger than older trees, due to the smaller foliage mass (Garcia et al, 1997). Garcia et al (1997) also reported the occurrence of another species of Hybolabus, H. columbinus (Erichson, 1848), also damaging leaves of the Brazil nut in the states of Acre and Amazonas.…”

“…When the infestation is high, these weevils can cause serious damages, more pronounced in younger than older trees, due to the smaller foliage mass (Garcia et al, 1997). Garcia et al (1997) also reported the occurrence of another species of Hybolabus, H. columbinus (Erichson, 1848), also damaging leaves of the Brazil nut in the states of Acre and Amazonas. It should be noted that H. columbinus was previously only known from Colombia and Guyana (Wibmer & O'Brien, 1986) and Garcia et al (1997) published the first record of that species for Brazil.…”

“…).03 4/8 species for sustainable extractive exploration of almonds (Fig. 1F), used raw or roasted as human food, or for obtaining oils used in aviation and in the manufacture of cosmetics (Garcia et al, 1997). The tree reaches 50 m in height (Fig.…”

“…Biological notes on natural history: Fazolin & da Silva (1995) and Garcia et al (1997) reported adults and larvae of H. amazonicus in the states of Acre and Amazonas, respectively, damaging old or new leaves of Bertholletia excels. Adults scrape the upper epidermis of the leaves and the continuous scraping activity by weevils can cause tears in the leaves.…”

“…The weevil (Coleoptera: Curculionoidea) was identified as Hybolabus amazonicus Voss, 1925 (Fig. 1G) and two papers on the occurrence and damage caused by that species in plantations of Brazilian nut were published (Fazolin & da Silva, 1995;Garcia et al, 1997).…”