| Factors reducing yield of organic white clover seed production were investigated in Denmark. In thirty-six fields from different regions, density of flower heads and their area, and weevils of the genera Apion and Hypera, hatching from flower heads, were assessed. In fifteen of these fields, additional measurements were made in order to calculate potential yield and yieldreducing factors. Flower heads had a mean of ninetytwo florets per head, of which proportionately 0,59 were intact, 0,08 were not pollinated and 0,34 damaged by weevils; 0,16 of the florets contained larvae of Apion species. In intact florets the mean number of seeds was 3,6. Density and size of flower heads were correlated with low density of flower heads leading to significantly more... |
