ISHS Acta Horticulturae 631: XXVI International Horticultural Congress: Issues and Advances in Transplant Production and Stand Establishment Research
COATING TECHNOLOGIES FOR SEED TREATMENT APPLICATIONS |
| Authors: | A.G. Taylor, D.H. Paine, N. Suzuki, B.A. Nault, A. McFaul |
| Keywords: | seed enhancements, Rhizobium, fluorescent tracer, imidacloprid, thiamethoxam, plant protectants, film coating |
| Abstract:
Seed coating technologies serve as delivery systems for biological and chemical seed and/or seedling performance enhancing treatments. Seed treatments must be applied uniformly over the seed surface for maximum efficacy. Here, application uniformity was studied using a fluorescent tracer mixed with Rhizobium inoculant and applied to pea seeds. A digital camera with UV illumination was used to examine application uniformity. Imaging software discriminated between non-treated, properly treated and over-treated portions of seeds. Seeds treated with an ‘on-farm’ auger had better uniformity of coverage compared to hand mixing. Doubling the amount of liquid improved the coverage for both methods. New chemistry seed treatments with systemic activity have the ability to control foliar pests. Bean seeds were treated with imidacloprid or thiamethoxam at 63 and 30 mg ai / 100 grams of seeds, respectively. These systemic insecticidal seed treatments were analyzed from both true leaf and trifoliate leaf tissue 28 days after sowing. Both systemic seed treatments were detected in leaves, with imidacloprid having a higher concentration than thiamethoxam. Thiamethoxam concentration was similar between first leaves and trifoliates, whereas imidacloprid was detected at over 4x higher concentration in the true leaves than the trifoliates. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
