The Radish 



171 



Usiiallj' the sowings are discontinued from the last of June 

 until late August. One ounce of seed sows 100 feet or more 

 of drill ; 8 to 10 lbs. are required for an acre. 



There are no prominent diseases of the radish. 



Cabbage koot-maggot {PhorMa 'brassicw). — See detail under 

 Cabbage. Radishes may be raised free from maggots by screen- 

 ing the beds with cheesecloth. 



Flea-beetles. — Screening the beds with cheesecloth will pre- 

 vent injury. 



Spinach aphis (Myzus persicw) . — See under Spinach. The 

 first pair of leaves sometimes becomes badly infested on the 

 underside. Spray with " Black Leaf 40 " tobacco extract, 1 pint 

 in 100 gals, water in which 4 or 5 lbs. soap have been dis- 

 solved. Do not use with bordeaux mixture on young' radish 

 plants as it will stunt them. 



In North America the radish is known mostly as a 

 spring crop, although it is sometimes grown in autumn. 

 In the Old World, however, it is known also as a summer 

 crop, but the varieties grown in the hot weather are usually 

 unlike those raised in the spring and autumn. In the 

 Orient (particularly Japan) it is a winter and spring veg- 

 etable, extensively eaten. 



There are three general types of radish roots : the or- 

 dinary small spring or autumn radish, usually light red 

 or clear white (Fig. 79) ; the large turnip radishes, useful 

 for summer cultivation, white, gray or black; the winter 

 radishes, that make a long hard red, white or black root. 

 The winter radishes are relatively little grown here, 

 although deserving to be better known. They are usually 

 sown late in the season, as are late turnips (July and 

 August) and the roots may be kept over winter as other 

 roots are stored. Some of them make roots 12 to 30 

 inches long and several inches in diameter. The flesh is 



