EFFECT OF DIFFERENT INSECTICIDES UPON GERMINATION AND VIGOR OF RICE SEEDS

Abstract

A laboratory test was conducted, aiming to verify the effect of different insecticides upon germinating power and vigor of rice seeds, cultivars IAC - 25 and Rio-Paranaíba, stored at 0, 7,15, 30, 60 and 90 days, after treatments. Germination tests were settled according routine analysis and evaluated after seven days by counting number of normal and abnormal plantules and dead seeds. For vigor test, the seeds were evaluated in each period at third day, using plantules growing method. All tested products with both cultivars revealed a good germination rate at storage different periods, excepting fenitrothion that affected significantly germination, determining an average drop of 22.46% and 32.84%, relative to testimony, for cultivars IAC-25 and Rio-Paranaíba, respectively. Fenitrothion followed by benfurocarbe were the products which presented major inhibition to plantules vigor.