2019 Volume 64 Issue 4 Pages 147-154
In order to select ground cover plants with effective weed management abilities, field experiments with seven perennial plants including Thymus serpyllum, Phlox subulata, Phyla nodiflora, Lampranthus spectabilis, Ophiopogon japonicus, Mentha pulegium and Liriope muscari were conducted to evaluate their weed suppression for five-years. Cover degree, multiple dominance ratio (MDR), dry weight of weeds, and the number of weeds at each plots were evaluated. L. muscari showed most practical weed suppression from second year to fifth year. L. muscari had strong allelopathic activity by bioassays. This Japanese domestic ground cover plant contained azetidine-2-carboxylic acid, a non-proteinogenic amino acid analogues to proline, at high concentration in root and leaves, and supposed to have a role as allelochemical to suppress weed on the field.
