A total of 20 petioles and ®ve stolons on each of four separate
strawberry plants each received injections of 500 ml Lform
inoculum at a single site less than 5 cm from its
attachment to the mother plant. BS1 L-forms were prepared
by centrifugation (2000 g, 10 min; Chilspin; MSE) of
exponential cultures in LPB, resuspended in 5% (w/v)
mannitol. Four control plants were exposed to identical
treatments using mannitol only. All plants were maintained