EMERGENCE RATE OF THE MEXICAN BEAN WEEVIL IN VARIETIES OF BEANS FROM THE SOUTHWESTERN AMAZON

Authors

  • Lucas Martins Lopes Center for Biological and Nature Sciences, Universidade Federal do Acre, Rio Branco, AC http://orcid.org/0000-0001-7686-4997
  • Josiane Moura do Nascimento Center for Biological and Nature Sciences, Universidade Federal do Acre, Rio Branco, AC http://orcid.org/0000-0001-7979-0137
  • Vanderley Bordes dos Santos Center for Biological and Nature Sciences, Universidade Federal do Acre, Rio Branco, AC http://orcid.org/0000-0002-1090-9280
  • Lêda Rita Dantonino Faroni Department of Agricultural Engineering, Universidade Federal de Viçosa, Viçosa, MG http://orcid.org/0000-0001-8648-5034
  • Adalberto Hipólito de Sousa Center for Biological and Nature Sciences, Universidade Federal do Acre, Rio Branco, AC http://orcid.org/0000-0002-3089-2762

DOI:

https://doi.org/10.1590/1983-21252018v31n428rc

Keywords:

Zabrotes subfasciatus. Phaseolus vulgaris. Storage. Plant resistance.

Abstract

Common beans (Phaseolus vulgaris L.) are one of the most important protein sources worldwide. However, infestation by bruchids compromises the storage of these beans after harvest. The objective of this study was to determine the emergence rate of Zabrotes subfasciatus (Coleoptera: Chrysomelidae) in four P. vulgaris varieties (Carioca Pitoco, Enxofre, Gorgutuba Vermelho, and Rosinha) cultivated in the southwestern Amazon (State of Acre, Brazil). The grains from each variety were infested with 50 non-sexed adult Z. subfasciatus, and the insects were collected 13 days after initiating the bioassays. The adult progeny was collected from each plant variety on alternate days from the beginning to the end of the emergence period, and they were counted (number of insects/jar). The sum of emerged insects per day (SEd) was determined from the beginning of the emergence period, from which the accumulated emergence was calculated (SEa= ΣSEd, % day). There were differences in the emergence rates of Z. subfasciatus among the bean varieties, with the rates being lower in the Gorgutuba Vermelho variety. Although this bean variety had the lowest peak of adult insect emergence, the period of insect development was not of increased length in this variety compared to the other varieties. In general, the Gorgutuba Vermelho variety appears to be resistant to Z. subfasciatus.

Downloads

Download data is not yet available.

Downloads

Published

17-10-2018

Issue

Section

Technical Note