| Abstrakt: |
A 4-year study was made of the distribution patterns of Bidrin®. (3-hydroxy-N-N-dimethyl-cis-crotonamide dimethyl phosphate) and/or its metabolites in the foliage of trees treated by different methods. Thirteen species of nursery-grown trees were used: sugar maple, Acer saccharinum L.; gray birch, Betula lutea Michx.; flowering dogwood, Cornus florida L..; Washington hawthorn, Crataegus Phaenobyrum Mel.; “Moraine Ash,” Fraxinus holotricha “Moraine”; green ash, F. pennsylvanica L..; “Moraine Locust,” Gleditsia triacanthos “Moraine”; American sycamore, Platanus occidentatis L..; eastern red oak, Quercus borealis Michx.; black locust, Robinia pseudoacacia L..; common lilac, Syringa vulgaris L..; American basswood, Tilia americana L.; and an ornamental variety of elm, Ulmus americana var. ascendens Slavin. Leaf samples were taken from various sectors of the tree crown and were used for bioassays with Daphnia pulex DeGeer. Distribution patterns were significantly better following root implants than following trunk implants. |
