232 Spraying for Apple Sucker (Psylla mali) 



The following table gives the treatment, the number of eggs on each 

 twig and the numbers which hatched. 



Number Per- 



of eggs Number centage 

 plot Treatment Twig on twig hatched hatched Mean 



B 



D 



II 



K 



M 



S 



Untreated 



Sprayed on March 5, 1915, with : 

 lime ... 200 lbs i self- 

 water . . . 100 gals j boiled 



Sprayed on March 18, 1915 

 Mixture as B 



Sprayed on March 5, 1915, with : 

 lime ... 150 lbs \ , ]f 

 salt ... 30 lbs h bo ^g d 

 water . . . 100 gals ' 



Sprayed on March 18, 1915 

 Mixture as D 



Sprayed on March 4, 1915, with : 

 lime ... 40 lbs ^boiled 

 sulphur... 24 lbs ,- for 

 water ... 100 gals ) 1 hour 



Sprayed on March 18, 1915 

 Mixture as F 



Untreated 



Sprayed on March 4, 1915, with: 



commercial lime sulphur wash 



Sprayed on March 18, 1915 

 Mixture as I 



Sprayed on March 4, 1915, with : 

 lime ... 40 lbs \ , ., , 

 salt ... 12 lbs [ h f Gd 

 sulphur... 24 lbs j j } ^ ur 

 1 J 



water 



100 gals 



Sprayed on March 18, 1915 

 Mixture as K 



Sprayed on March 5, 1915, with : 

 lime ... 12 lbs ^boiled 

 sulphur... 24 lbs c for 

 water ... 100 gals .' 1 hour 



Sprayed on March 18, 191". 

 Mixture as M 



The above results although showing large variations for the same 

 treatment give som e idea as to theamounl of suckers which are prevented 



