424 Agricultural Journal of Victoria. 



8. The oat grows well in take-all patches, and is not attacked by 

 the funguSj lience it is recommended for starving it oiit. 



9. The earlier varieties of wheat are considered in Europe to be 

 the worst affected, but none grown here can as yet be said to be 

 resistant. 



1 0. The kind of soil seems to exercise some influence upon it, for 

 though the disease occurs on poor and rich land, yet crops on the 

 looser friable soils generally suffer more or die at an earlier stage. 

 Any measures which tend to improve the mechanical condition 

 are beneficial, such as early fallow, working the land only when wet, 

 feeding off with sheep if growth is strong, and rolling after sowing. 



11. A proper rotation is strongly recommended, since the fungus 

 may be starved out by depriving it for a time of its normal food, the 

 wheat-plant. 



In conclusion I have to thank all those who kindly aided me in 

 this investigation by means of information or specimens, and among 

 them may be specially mentioned Messrs. Molineux and Summers of 

 South Australia, and in Victoria, Messrs. Smith of Horsham, Peters 

 of Goornong, Schlitz of Quambatook South, Adams of Laen, Towns 

 of Nhill, Payne of Netherby, and Pescott, Orchard Inspector. 



Explanation of Plates- 



OpJnohol'US graminis, Sacc. 



Fig. 



1. Young wheat plant killed by the take-all fungus (nat. size). 



2. Wheat plant killed by the take-all fungus just before the 



formation of the ear. The black dots near the base of 

 the stem are the fruiting portions of the fungas, and 

 the roots have broken off short when the plant was 

 pulled (nat. size). 



3. Mycelial filaments from inner surface of sheath of diseased 



plant ... ... ... ... ... ... X 200 



4. Mycelial filaments joined to form broad bands, from inside 



of sheath ... ... ... ... x 200 



5. Plate mycelium coating the stem (between innermost sheath 



and stem) ... ... ... ... . . . x 200 



6. Portion of stem of diseased plant, showing the dark 



mycelium within the cells ... ... . . . x 200 



7. Mycelial filaments from inside of sheath ... ... x 200 



8. Part of Fig. 7 more highly magnified ... . . . x 400 



9. Portion of sheath of diseased plant showing as numerous 



black dots the fruiting portion or perithecia of the 

 fungus ... ... ... ... ... X 3 



10. Portion of sheath from a long dead plant showing the 



densely crowded perithecia of the fungus ... ... x3 



