Eficácia da mistura dióxido de carbono-fosfina no controle de Sitophilus zeamais em função do período de exposição Effectiveness of the mixture dioxide of carbon-phosphine in the control of Sitophilus zeamais as a function of the exposure period

Revista Brasileira de Engenharia Agrícola e Ambiental - Agriambi

关键词: armazenamento de grãos;    atmosfera modificada;    dióxido de carbono;    fosfina;    Sitophilus zeamais;    grains storage;    modified atmosphere;    carbon dioxide;    phosphine;    Sitophilus zeamais;   

DOI  :  10.1590/S1415-43662000000200016

来源: DOAJ

【 摘 要 】

Este trabalho teve por objetivo avaliar o efeito da atmosfera modificada (100% CO2) associada a doses de fosfina no controle de Sitophilus zeamais (Motschulsky). Concluiu-se que: o aumento do período de exposição resultou no aumento da eficácia dos tratamentos; as pupas de S. zeamais foram mais tolerantes aos tratamentos, enquanto os ovos e as larvas de primeiro ínstar foram mais sensíveis e que a concentração de 0,75 g m-3 de fosfina, associada à atmosfera contendo 100% de CO2, no período de 120 h de exposição, é a mínima necessária para o controle efetivo de todas as fases de desenvolvimento do S. zeamais.
The objective of this work was to evaluate the effect of a modified atmosphere (100% of CO2) associated with three phosphine concentrations (0.25, 0.50, and 0.75 g m-3), on the control of different stages of development of the insect Sitophilus zeamais (Motschulsky). It was concluded that, in general, (1) an increase in the exposure period caused an increase in the effectiveness of both the treatments with atmosphere containing 100% of CO2 and atmosphere with ambient air, associated to the phosphine, for all development stages of Sitophilus zeamais; (2) the pupae of Sitophilus zeamais were the ones with the highest tolerance to the treatments used for control, while the eggs and larvae from the first instar were the ones with lesser tolerance; (4) the concentration of 0.75 g m-3 of phosphine associated to the atmosphere containing 100% of CO2, for the exposure period of 120 h, was the minimum necessary to effectively control all development stages of Sitophilus zeamais.

【 授权许可】

Unknown