76 



Insect Pests. 



A. — In America. 



(Paris Green, \ lb. to 

 Paris Green, I lb. to . 

 J.. \ Arsenate of Lead (w€ 



Paris Green, I lb. to 50 galls, water 

 50 galls, water 

 (weaker solution) 

 Arsenate of Lead (stronger solution) 

 Unsprayed ..... 



Percentage of Fniit 

 Harvested. 



61-65 

 43-46 



74-98 

 82-50 

 43-67 



t 

 63-04 



51-33 



81-68 



81-45 

 49-09 



/ Paris Green, \ lb. to 50 galls, water 



Paris Green, ^ lb. to 50 galls, water 



11. ( Arsenate of Lead (single strength) 



Arsenate of Lead (double strength) 



\ Unsprayed ..... 



Percentage of Picked 

 Fruit Injured. 



32 



202 

 310 



5-88 

 3-43 



37-82 



B.— At AVye. 



intage of Fruit Injured 

 by Maggots. 



f Paris Green, J lb. to 50 galls, water 

 III. Arsenate of Lead (normal) . 



Unsprayed ..... 



t 

 37-5 



20-5 

 62-5 



29-7 

 15.5 



71-5 



Grimes' Golden Apple. 



Worcester Peari 



The strength of the arsenical wash, used at Wye, was as follows 



Acetate of Lead 

 Arsenate of Soda 

 Water 



12 oz. 



4 oz. (40-50 p.c.) 

 100 gallons. 



Eecent experiments have shown that this wash was not then 

 recommended at sufficient strength for all purposes. The new 

 formula is given in the appendix. 



A great deal of good may be done in grass orchards by keeping 

 pigs in them when the apples are falling, and some benefit has been 

 found from the presence of poultry. Trees should also be kept clean 

 by either using once every two or three years the lime and salt 



