HP 



THE FUNGI WHICH CAUSE PLANT DISEASE 



'Bacteria, Schizomycetes. 

 TANOPHYCE;E, Blue-green Algse. 



Myxomycetes, Slime Fungi. 



Peridine^e, Dinoflagellates. 



ONJUGAT^, Conjugates. 



lATOME.*;. 



iHeterocont.e. 



CHLOROPHYCE.ffi, Green Algae. 



iHARACE^, Stoneworts. 

 'Rhodophycb^, Red Algae. 

 EuMYCETES, Fungi. 

 'Phycomycetes, Alga-like Fungi. 

 pHiEOPHYCE^, Brown Algae. 



Key to the three Divisions important as plant parasites: 



Vegetative body a multinucleate naked Plasmodium 



Division I. Myzomycetes, p. 5. 



Vegetative body a single-walled cell, nucleus absent or not of the 

 form typical in the other fungi, reproduction by fission (by conidia 

 in a few non-parasitic forms).. .Division II. Schizomycetes, p. 13. 



Not as above: Vegetative body usually filamentous, reproduction by 

 various means Division III. Eumycetes, p. 59. 



