Black-Knot of Plums and Cherries. 655 



done as soon as the knot is observed, and if well carried out it is 

 an excellent method of exterminating the disease. Page 647. 



14. Since fungicides have come into use, spraying for the black- 

 knot has been recommended. Page 648. 



15. The conclusions drawn b}' Maynard from the experiments 

 of one season recorded by him were that ' ' the number of warts 

 was rerv decidedly less where treated with the copper mixture, 

 than where untreated. * '-^ * and we believe that the plum 

 wart may be held in check by this remedy." Page 649. 



16. A thicket of Morello cherries which had been treated dur- 

 ing two seasons by this station produced only 165 new knots. 

 Page 652. 



\~. From another portion of the same thicket which had not 

 been treated there were cut 2002 knots on April 25, 1894. On 

 November 26 of the same year this portion yielded 3466 new knots, 

 an increase of nearly 58 per cent. Page 652. 



18. Had the sprayed portion remained untreated it may be 

 supposed that a similar increase would have taken place in this 

 part, making the assumed number cut within a fraction of 2000. 

 Page 652. 



19. The reduction of the number of knots from 2000 to 165, 

 considering the present state of our knowledge, and the conditions 

 under which the experiment was carried on, are encouraging, and 

 point to a final control of the disease. Page 652. 



20. Some of the applications which now appear necessary for 

 the control of the black knot are to be made when other diseases 

 require treatment. This necessitates but little extra labor in 

 spraying for the prevention of the knots. Page 653. 



2 1 . The spraying of plums and cherries to protect them from 

 the black-knot fungus, as stated on page 653, can be carried on with 

 profit in all sections where this disease threatens to interfere ser- 

 iously with the profitable cultivation of these fruits. 



E. G. LODEMAN. 



