134 DISEASES OF THE SWEET PEA 



favorite host. Outdoors the red spider 

 may attack sweet peas, tomatoes, wild and 

 cultivated violets, beans, cowpeas, dahlia, 

 Jamestown weed, wild blackberry, and 

 the wild geranium. Although red spiders 

 have few natural enemies, yet the insect 

 Thriphleps insidiosus (fig. 22) frequently 

 helps to keep it in check. 



