CONTHXTS 



The fungus (Acanthorhi/nchiis rarriiiii Slipar) eausius the rot- 



Page. 



Introduction ^ 



Previous investiKatidUS 1^^ 



The most serious diseases '- 



Blast 1- 



Seald ^^ 



The funirus [diiifinitrtliii r(/rr///// Sliear) causiuf? bhist and scald 14 



r.venidial form 14 



Ascogenous form l** 



Cultures of (juUiiuirdln rarcinii 1<> 



I'ycnidial form ^^ 



Ascogenous form 1" 



Conditions or factors deternuning the pnMhiction of the ascogenous 



form 1-^ 



Dormant condition of the fungus 21 



Time and manner of infection 22 



Treatment 24 



Applications to the soil 24 



Improving tlie condition of the plants 24 



Selection of resistant varieties 25 



Application of fungicides 25 



Rot 2G 



27 



Ascogenous form 27 



Appressoria 27 



Relationship of the fungus 28 



Cultures of the fungus- 29 



Treatment-^ -'^ 



Anthracnose ^^ 



The fungus {GloniercUa rufomacuJanft racciiiii Shear) causing an- 

 thracnose •>! 



Conidial foi'm 31 



Ascogenous form 31 



Appressoria, or chlamydospores •>2 



Cultures of GlovtereUa nifrnuacKlavs raccuiil 32 



Factors determining the production of the ascogenous fructifica- 

 tion 33 



Relationship of the fungus 33 



Dormant condition of the fungus 34 



Treatment , 35 



Hypertrophy 35 



The fungus (E-robiD^ifliiiiii o.riicocci Rostr.) causing hypertrophy 3(5 



Relationship to otlier Exobasidii 36 



Treatment 37 



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