Ação de óleos essenciais na persistência da mortalidade do gorgulho e sobre atributos de qualidade fisiológica de sementes de milho

Abstract

Corn stands out as one of the most important crops in the world. As a crop with a high degree of adaptation to different ecosystems, maize is grown on both large, medium and small farms. One of the main pests that cause damage to stored corn is Sitophilus zeamais, also known as corn weevil. Currently there are chemical insecticides available on the market to control this pest, but little is known about the environmental and food problems that the use of these products can cause. Considering the economic importance of S. zeamais, the objective of the present study was to evaluate the potential of essential oils of Cymbopogon winterianus (citronella), Cinnamomum verum (cinnamon), Eucalyptus globulus (eucalyptus) and Azadirachta indica (neem) in the persistence of control. of pest in corn grains as well as to verify the effect of these treatments on the germination of corn seeds. For this purpose were used the oils of C. winterianus, C. verum, E. globulus and A. indica with their respective DL90 where weevil mortality variables were analyzed as well as physiological aspects of corn seeds were treated with essential oils. The experiment was carried out at the phytosanitary laboratory of the Federal University of Fronteira Sul, campus Cerro Largo. The data obtained in the experiment were analyzed by Sisvar Software 5,6 and Excel Software. The essential oil of A. indica showed a long period of persistence of S. zeamais mortality, while C. verum showed an allelopathic effect on variables such as shoot and root length.