BR0W5 ROT OF APPLES 



The name "Brown Rot" as applied to the rot caused hy 



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Sclerotina fruotlgena, or Monilia, as it appears on its var- 

 ious hosts, is not particularly descriptive, for there are other 

 fungi which cause a spot or rot which is Just as characteristi- 

 cally hrown. It is often called Ripe Rot, Fruit Rot, or Plum 

 Fruit Rot, Plum Rot, Peach Rot, or Peach Blight, when referring 

 to its particular hosts. "Brown Rot", however, is the name most 

 conmonly employed in literature,*^ 



The scientific names have been as numerous as the com- 

 mon name. The earliest is Torula fruct igena, given by Persoon 

 in 179 6.^' Later he changed it to AcrosT^oriu m fructigena. Since 

 then it has been Oidium fructigena Lk. , Oidiiuii laxuga Ehr. , Did - 

 iu m wallrothii Thftm. , and Gospora fr uctigena Waltr. Persoon him- i 

 self finally referred the fungus to the genus Monili a where Sac- 

 cardo places it - in the Fungi Imperfecti. In 1893 SchrOter 

 surmised the ascomycetous nature of the fungus and placed it 

 in the genus Sclerotinia. Norton^ in 1902 found the apothecia 

 arising from the sclerotia and was able to produce typical 

 Mon ilia from the ascospores. Thus its identity as Sclerotinia 

 was definitely established. 



There has also been great dificulty in differentiating 

 between S« fructigcena and S. cinerea . They will both, whsn 

 artificially inoculated, grow on either pomaceous or drupace- 



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