half of each of the water or oil preparations finely powdered cellulose 10 g added to 50 g formulation was incorporated as an adhesive controls consisted of sterile vermiculite moistened with water or oil the six preparations were applied with a spatula to freshly cut stumps of red alder saplings 4 6 cm diameter 10 stumps per treatment in a randomized block in a douglas fir plantation near victoria british columbia results are presented in table 2 table 2______________________________________ sprouts stumps with sprouts fruiting per gt 20 cm bodiestreatment stump high total cm sup 2 ______________________________________water suspensionno adhesive 0 8 1 2 211cellulose added 0 9 0 3 213oil suspensionno adhesive 1 4 0 0 168cellulose added 2 0 0 0 296controlswater suspension 5 1 2 8 55oil suspension 4 0 2 4 70______________________________________ based on a total of 10 stumps data collected 9 months after treatment for the first column sprouts stump the combined treatments are significantly different from the combined controls at p 0 01 mean area of stump surface occupied by fruiting bodies of c purpureum data collected 14 months after treatment it was therefore very clear that maintenance of a continuous and closed pure culture system throughout the production and storage phases was a valuable concept in the development of bioherbicides based on fragile mycelia such as c purpureum also having an.