Stem Curl. 



This is merely a more pronounced case of the foregoing trouble 

 due to an aggravated cause, which manifests itself in the curling of 

 the apex of the stem and leaves, their growth being -thus restricted. 

 Plants affected in this manner are likely to remain in this condition 

 for some days or even weeks without any signs of recovery. When 

 the roots come in contact with soil not over manured or adapt them- 

 selves to these extreme conditions which lie at the bottom of this 

 trouble, if that be possible, they will frequently show signs of 

 improvement. Plants affected in this manner are capable of recov- 

 ering, as has been shown by experiments, and in most cases it might 

 be well to wait their recovery rather than to make an attempt to 

 replant the crop. 



Cl'Cumber Wilt. 



The wilting of cucumbers is a serious disorder with which some 

 growers have to contend ever)' year. Complaints in regard to this 

 disease have always come from certain localities where it has, as a 

 rule, been quite universal. The symptoms of the disease are a wilt- 

 ing of the plant, or, more strictly speaking, of the foliage, whenever 

 it is subjected to the intense rays of the sun. In houses running 

 north and south, the vines on the east side, which are subjected to the 

 morning rays of the sun, will be entirely wilted; while those on the 

 west side, and away from the sun's rays, will not be in the least 

 affected. In the afternoon, when the sun has reached the west side 

 of the house, the vines in that portion of the house will become 

 badly wilted, while those on the east side, no longer exposed to the 

 direct rays of the sun, will commence slowly to recover. Frequent 

 examinations of wilted plants have failed to reveal the presence of 

 any pathogenic organisms, and their unhealthy state is not diffi- 

 cult to understand when one takes into consideration the condi- 

 tions under which the plants have been grown. 



This wilt is due to the extremely abnormal conditions of the plant 

 brought about by irrational methods of cultivation, causing defective 

 transpiration (the giving off of water from the leaves). The activity 

 of transpiration is affected by various causes. It is well known that 

 the stomata or breathing pores of the leaf are open during sunshine 

 and closed during darkness, and that the greatest activity in transpi- 



