Spinach Diseases 177 



tance to greenhouse rhubarb. The causal fungus 

 causes irregular spots, which fall out and give the 

 affected foliage a ra^ed appearance. 



Spinach {Spinacia oleracea) 



Cultural Considerations. There has developed 

 lately a tendency to grow indoor spinach on a large 

 scale. Growers who have tried it out find that it is 

 as profitable a crop as lettuce. The cultural re- 

 quirements of spinach are the same as those of let- 

 tuce, see p. 145. If the soil is deficient in nitrogen an 

 application of nitrate of soda will be very beneficial. 

 The aim should be to encourage rapid growth, which, 

 moreover, insures high quality. Vigorous broad- 

 leaved varieties such as Victoria, New Zealand, and 

 others are recranmended. 



Diseases of the Spinach 



Indoor spinach is generally subject to less diseases 

 than that grown out of doors. 



Malnutrition 



Cause : An excess of acidity or a lack of soil humus. 



Symptoms. Malnutrition may be met with where 

 CMiunercial fertilizers are used to the exclusion of 

 organic manures. The margins of the veins of the 

 leaves become yellow while the central part takes 

 on a mottled appearance. The outer leaves are usu- 



