Studies on the Plantain Head Blight II.Biological Characteristics of Fusicoccum sp.

Experiments on the conditions for mycelium growth and the induction of sporogenesis of Fusicoccum sp.were conducted.The results showed that the appropriate range of temperature for Fusicoccum sp.growing is 15～30 ℃,and 25 ℃ is the best.pH 4.01～7.02 is suitable for the growth of the mycelium,with an optimum of pH 4.98.The mycelium has different growth rates on different carbohydrate media with saccharose the best carbon source.Illumination has no effcet on mycelium growth of the fungus.Stroma,pycndium and conidium can not be produced on all kinds of the tested media,and even can not inducively produced by different measures,however,they can be produced under cultivation with sterilised healthy leaves and ear axes of plantain.The cultivated stromata are apparently bigger than the natural ones;but either pycnidia or conidia has no difference in size with its natural counterpart.