Some Important Pear Diseases. 



275 



The original rows nm as indicated by the lettered rows, and the 

 spraying was made across both varieties, hence according to the num- 

 bered rows. 



sc 



C 

 < 



a 



5 



0) 



■ LI7 



X — * 



-* — * — * — *- 



^ >k >i< ^ — X 



>fc >ic 'If X * 



* :k >k >k ^ 



>k >k >i :*: >c 



5k *: :k ><. ><. 



16 15 14 13 



12 





10 



> ? > C > C > C 3 C 5 C 5 i 



i^ :+: if/: ^c sfc; :>fc >(c 



;^< >Jc 5i< >f: >Jc 5fc ^ 5fc E 



* D 



-*- 



6 



4 3 



* C 



* — * B 



* — * A 



Row I, Ammoniacal copper carbonate, four times, May 6 and 27, 

 June 1 1, July 17. 



Row 2, Ammoniacal copper carbonate, three times, May 6, June 1 1, 

 July 1 7. 



Row 3, Bordeaux mixture, four times. May 6 and 27, June 11, 

 July 17. 



Row 4, Bordeaux mixture, three times. May 6, June 11, July 17. 



Rows 5 and 6, Potassium sulphide, three times. May 27, June 11, 



Julyi7» 



Row 7 and 9, check, unsprayed. 



Row 10, Ammoniacal copper carbonate, three times, May 27, 

 June II, July 17. 



Row II, Ammoniacal copper carbonate, two times, June 11, 

 July 17. 



Row 12, Bordeaux mixture, two times, June 11, July 17. 



Rows 13-17 unsprayed. 



Row 8 not included (Kieffer). 



It is seen that the first spraying (omitted from some) was made 

 before the blossoms were fully open, the next soon after the petals 

 fell, and two sprayings were made during the summer months. Notes 

 were taken on August 3, September 2, and October 5. Defoliation 



