Studies on the changing role of weeds of the genus Polygonum in the diet of the partridge Perdix perdix L.
Seeds of Polygonum spp., especially P. convolvulus, were the main weed seeds eaten by partridges in October 1968 and formed 44% of the total dry weight of dicotyledonous weed seeds in the diet. Polygonum spp. were preferred to other weed species in the stubble flora. Polygonum spp. populations have been reduced as a result of improved crop husbandry techniques and it is expected that this will reduce their contribution to the diet. See also Weed Abstr. 20: 2448.-P.K.