BULLETIN No. 138 JU NE, 1911 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION 



TOMATO DISEASES 



BY 



GEORGE E. STONE 



Diseases Induced by Parasitic Organisms 



BLOSSOM END ROT 



Theories in Regard to the Cause. Spraying for Tomato Rot. Investiga- 

 tions on the Blossom End Rot of Tomatoes. Relation of External 

 Conditions to the Blossom End Rot. Conclusions 

 Regarding the Blossom End Rot. 



Timber Rot (Sclerotinia). Tomato Scab (Cladosporium) . 

 Sleeping Disease or Wilt (Fusarium). Downy Mildew 

 (Phytophthora) . Anthracnose (Colletotrichum). Leaf Blight 

 (Cylindrosporium). Leaf Blight (Septoria). Leaf Mold 

 (Alternaria). Blight (Bacillus). Eel Worms (Heterodera). 

 Surface Mold. 



Diseases Induced by Abnormal Functions 



Burn or Scald. Hollow Stem. Oedema. Mosaic Disease. 



Soil Conditions. General Considerations in Regard 

 to Greenhouse Diseases. Conclusion. 



Requests for bulletins should be addressed to the 



Agricultural Experiment Station, 



Amherst, Mass. 



