New York Agricultural Experiment Station. 29 



(c) The injuries caused by the cucumber flea-beetle were much 

 diminished by the spraying. 



In 1896 neither of the two common potato blights appeared, 

 but nevertheless the spraying was accompanied with excellent 

 results. 



Cucumber blight. — The pickle industry of Long Island is an im- 

 portant one and it has lately been threatened with destruction 

 by downy mildew. Many cucumber growers are reported to 

 have about decided to give up the business on this account. 



An exp^iment made by Mr. Stewart has pointed out a success- 

 ful and practical remedy for this disease, an account of which 

 will appear in a future bulletin. 



Spraying for carnation rust. — At the present time a large 

 amount of money is received by forcing house men from the 

 growth of carnations. One obstacle to this industry is the rav- 

 ages of the rust, and much attention is being given by the Sta- 

 tion to this matter. 



The results so far reached indicate that spraying with a solu- 

 tion either of copper sulphate or potassium sulphide, preferably 

 the former, may at least partially control the disease. In one 

 experiment fifty-eight per cent of the plants of a very suscep- 

 tible variety were kept free from rust, the unsprayed plants be- 

 ing all affected. 



Entomological Investigations. Cause of pimply potatoes. — 

 A condition of the potato tubers which is termed " pimply " has 

 been noticed in southeastern New York and other places, the 

 cause of which has heretofore been unknown. 



An investigation instituted by the Station has brought to light 

 the fact that this injury is caused by larvae of the cucumber flea- 

 beetle feeding upon the tuber. 



As the flea-beetle is discouraged from feeding upon the vines 

 by the use of Bordeaux mixture, spraying with the liquid is rec- 

 ommended as a preventive of " pimply " potatoes. 



Prevention of insect ravages. — The reports of the entomologist 

 advise, on the basis of careful experiments, that the injuries due 

 to certain insects can be wholly or in part prevented by the sev- 

 eral methods mentioned below. 



