Efeitos de extratos vegetais Cinnamomum zeylanicum e Cymbopogom winterianus na qualidade de sementes de milho durante o armazenamento.

Abstract

The indiscriminate use of pesticides has caused several environmental problems. as contamination of soil, water and ecosystems. In search of alternatives pest control in stored seeds, many researchers have dedicated to the study of plant extracts and oils, which contain substances bioactive substances known as secondary metabolites. The gift was made with the objective of showing the importance of pest control using extracts from botany. Plant extracts are liquid or powdery preparations obtained by removing active principles of vegetables by some methodologies, which have as their purpose to concentrate insecticidal substances on insect control in stored seeds. The leaves of the species of Cinnamomum were used. zeylanicum and Cymbopogon winterianus on Sitophilus zeamais adult in corn Aztec variety and the effect of these products on the physiological quality of seeds in storage. Extracts at doses of 3, 6, 9 and 12 mL were used on the adult insects through a potter tower, getting the best doses to inhibit the development of insects during the 120 days of storage, satisfactory results in insect control at doses 6, 9 and 12 mL, without affecting germination during seed storage in two inoculated processes (with 30 adult insects in each container) and not inoculated. Repellency was evaluated using an arena with source powders. tense vegetable was evaluated the effect associated with repellency / attractiveness and mortality of adults of Sitophilus zeamais. In this test we used seed samples ground corn 10 and 0.3 g of plant powders. In each box, 30 adult insects, with four repetitions for each treatment. These results showed that citronella and cinnamon can be used as a plant insecticide in the control of Sitophilus zeamais in the storage of corn seeds, A more efficient study with phytochemical analysis of better proof of its chemical constituents with insecticidal action.