Fig. 5-3. The lower 7 to 10 cm (3-4 in) of tall fescue plant tillers (stems) are used to determine the presence of the fungal endophyte. About 12 plants/ha (5 plants/acre) must be selected at random from throughout a field, and a tiller (right) from each plant selected (left) should be refrigerated and sent to the laboratory for analysis. (Photo: C.P. West)