Control of Flea Beetles on Canola with Insecticides Applied as Seed Treatments, 1992

This test was designed to evaluate fungicide and insecticide seed treatments against naturally occurring populations of plant pathogens and insects. The treated seed was planted at the MSU Post experiment farm near Bozeman on 4 May. Four row plots measuring 1.3 m x 6 m and seeded at 160 seeds/m2 were arranged in a randomized block design with 4 replicates. Flea beetle damage was assessed on young cotyledons 24 d after seeding. Stand density counts were made after the 4 true leaf stage. Three applications of Sevin insecticide were applied at approximately 2 wk intervals, starting at the time the plots were rated for flea beetle damage. Data collected were analyzed using analysis of variance. The statistical relationship between means was determined with Student-Newman-Keuls multiple comparison test at P = 0.05. In this test, the fungicides were chosen to control a wide spectrum of disease organisms.