CHAPTER 15 



RADISH {Raphnus sativus) 



Cultural Considerations. There are few green- 

 houses near a large city which do not force radishes. 

 The radish more than any other plant thrives best 

 in full light. Shade favors the development of 

 foliage over root. The varieties best liked by the 

 market are those of the Scarlet Rose type. A light 

 sandy soil which contains sufficient humus is ideal 

 for forced radishes. Radishes need plenty of water. 

 However, overwatering may favor damping off. The 

 most favorable temperatures are 43 to 45 degrees 

 F. at night and about $$ to 62 degrees during the 

 day. In warm days the ventilators should be fully 

 open. On cold days they may be opened a little at 

 a time. Radishes are often intercropped with let- 

 tuce or cauliflower. 



Diseases of the Radish 



Radish is subject to many diseases in common 

 with the cauliflower and numerous other crucifers. 

 Club Root, see Cauliflower, p. 122. 



Black Rot 



Caused by Fseudomonas campestris (Pam.) 

 Ew. Sm. 



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