SPRAYING 2ig 



used. Where combination sprays are used 

 the soap is to be omitted. 



Spraying Greenhouse Sweet Peas, 

 Under greenhouse conditions, insect and 

 fungous pests are more easily controlled 

 than out of doors. In the greenhouse, con- 

 ditions are more nearly under the control 

 of the grower. By proper cultural care 

 many troubles may be kept in check, so that 

 spraying may be dispensed with. There 

 are, however, certain days when the 

 weather is such that proper ventilation is 

 difficult if not harmful. The greenhouse 

 air then becomes saturated with moisture, 

 which favors the development of mildew. 

 At other times the house is allowed to get 

 too dry and red spiders and aphids make 

 their appearance. Theoretically red spi- 

 ders and mites may be controlled by fre- 

 quent syringings with plain water. Prac- 



