Abstract

Abstract Onions ‘Golden Cascade’ were seeded at the Brink Farm near Grant Michigan on 4 May in single rows using a vee-belt seeder with a 1-inch wide shoe. Plots were 15 ft long, replicated five times in a randomized complete block arrangement, 12 inches between rows, with untreated buffer rows between each plot. Plots were seeded at 12 seeds per foot, for a total of 180 seeds per plot. There were four seed treatments with Trigard plus three in-furrow insecticide treatments and associated control treatments. Trigard treatments were: a previously tested pellet formulation containing sand, a new pellet containing diatomaceous earth, and a seed coat held on the seed with a thin film coat. Pelleted seed included the fungicide Progrow. Seed film coat treatment and untreated seed included thiram. Lorsban, Dyfonate, and Admire treatments were applied in furrow at planting with thiram-treated seed. Three weeks post-planting, 100 plant sections in each replicate (or the entire replicate if 100 plants were not present) were marked. The number of damaged plants in each 100 plant section were counted weekly from 8 Jun-8 Jul. Final stand counts were made at the end of the season.

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