VEGETABLE AND FIELD CROPS 233 



not angular, spots which, instead of yellowing, turn brown, 

 die, and often tear. Upon the stems it forms elongated 

 light brown spots, and on the fruit sunken spots much like 

 those upon the watermelon. Twenty-five to sixty per 

 cent injury has been estimated in New Jersey, and $10,000 

 to $15,000 damage has been reported from a single county 

 in Nebraska. This disease is more fully described under 

 watermelon. 



It is especially bad under glass. The treatment is as 

 for the downy mildew, see above. In the field, spraying 

 has proved effective. 



Wilt, bacillose. See cantaloupe. 



Wilt, fusariose. See watermelon. 



Phyllostictose. See cantaloupe. 



Cercosporose. See cantaloupe. 



Sclerotiniose, timber rot (Sderotonia Libertiana Fckl.). — 

 Upon cucumbers under glass this disease occasions serious 

 loss. It is rare out of doors. The first indication of the 

 disease is the appearance of a dense mass of white myce- 

 lium near the nodes of the stem which is still green. As 

 the disease progresses the stem shrinks and yellows, the 

 softer parts decay, and the stem finally dries up. In the 

 interior of sick stems the white mycelium may also be 

 found, and later near the nodes smooth, slender, black 

 sclerotia. Sclerotia are also sometimes found on the ex- 

 terior of the stem in the mycelial masses. The germina- 

 tion of the sclerotia, described under lettuce sclerotiniose, 

 results in immense numbers of spores. These falling upon 

 dead cucumber tissues grow upon it and form a mycelium 

 which attains such vigor as to enable it to attack healthy 

 tissue and rapidly destroy it. 



