Oviposição e desenvolvimento de Sitophilus zeamays nas variedades de milho, Matuba e Sussuma

Abstract

The present work aimed to determine oviposition levels, stages, developmental periods and prevalence of Sitophilus zeamays in Matuba and Sussuma maize varieties. The study started in October 2006 and ended in December of the same year. The experiment was carried out in the laboratory of the Department of Biological Sciences of the Eduardo Mondlane University in Maputo, at a temperature of 28±2°C and 55±5% rh. 120 experimental units were used, each containing 12 insects. 15 days after implantation of the experiment, the levels of oviposition, amounts of larvae, pupae and adults in each experimental unit for each variety were evaluated. The results indicate that S. zeamays obtained higher levels of oviposition, development of larvae, pupae and adults in the Sussuma maize variety, with average percentages of about 43.71%, 22.07%, 14.21% and 7.47% respectively, which presupposes that this is the variety more susceptible to the weevil in relation to the Matuba maize variety, in which the average percentages of oviposition levels in the development of larvae, pupae and adults were about 33.75%, 17.32%, 6.47% and 3.61% respectively, which indicate that this the most resistant to the corn weevil The period of development of the stages of S. zeamays did not present significant differences between the two varieties, except for the pupa stage, which was faster in the Sussuma variety than in the Matuba variety, occurring at 25 and 30 days of age. exposure, respectively (TRADUÇÃO NOSSA)