No. 6. DEPARTMENT OF AGRICULTURE. 1019 



This is too strong' for the peach, wliere 2^ oz. each of Paris green 

 and quick lime should be used instead of ^ tb. Keep the mixture 

 well stirred while using. To make it, mix the Paris green and the 

 lime and add enough of the water to slake the lime, stirring while 

 hot, then add the rest of the w^ater. 



Good Paris green gives far better results than the cheaper grades. 



ARSENATE OF LEAD. 



This is a comparatively new insecticide, its value having only be- 

 come knowm within a few years. It has several advantages over 

 either Paris green or London purple, the chief ones being that it re- 

 mains more easily suspended in water, thus requiring much less 

 stirring up during the spraying; that it shows plainly on the leaves, 

 indicating where the sj)ray has reached, and where it has not; and 

 that large proportions may be used without danger of burning the 

 kaves. It is, therefore, especially useful where the leaves are j^ar- 

 ticularly sensitive. 



Parts. Per bbl. 



Arsenate of soda, 4 oz. 2 oz. 



Acteate of lead, 11 oz. 5^ oz. 



Water, 100 gals. 50 gals. 



These two substances, when placed in the water dissolve rapidly, 

 and combine, forming a fine white sediment which is the Arsenate of 

 Lead. It can also be purchased ready for addition to the water, but 

 it is usually better w^hen prepared as above. It is as cheap, or in 

 the end cheaper than Paris green, as it stays much longer on the 

 trees before being washed ott' by the rains. Some persons advise 

 the addition of two quarts of molasses to each hundred gallons of 

 the water, but the benefit to be derived from this is questionable. 



WHALE OIL SOAP. 



Parts. Per bbl. 



Whale oil soap, 2 Tbs. 80 lbs. 



Water, 1 gal. 40 gals. 



This is much stronger than Kerosene Emulsion and should only 

 be used during winter, when the trees are not growing. It can bo 

 used for insects which cannot be killed by Kerosene Emulsion. In 

 spraying for the San Jose Scale in the fall (see under Peach), it 

 should be used at the rate of one pound to a gallon of water; in the 

 sj)ring before the buds open, or for winter work, it can be used as 

 above given. 



