1334 The Vegetable Industry in New York State 



White PicMe, Fig. 391. Fruits are light colored and stunted. 

 They are often mottled with yellow and green. The green blotches 

 may stand out as warts. The leaves turn yellow and affected 

 plants eventually die. The disease has been known only a few 

 years but occurs in many localities. Nothing is known in regard 

 to its nature, cause or remedies. The same or a very similar 

 disease is destructive to greenhouse cucumbers in some localities. 



Fig. 390. — Cucumbers Downy Mildew — Eably Stage 



LETTUCE 



Tip Burn. The edges of the leaves die and turn brown, making 

 the product less salable and in severe cases decreasing yields. 

 Various combinations of climatic conditions, resulting in a too 

 rapid loss of moisture from the lettuce leaves, are responsible for 

 the disease. It is usually brought about by two or three warm, 

 moist days, resulting in a soft, watery growth, followed by a warm, 

 bright day, when there is a rapid loss of moisture. Under glass 



