468 



INJURIOUS AND BENEFICIAL INSECTS OF CALIFORNIA. 



COMMERCIAL LIME-SULPHUR 



The commercial lime-sulphur is a perfectly clear liquid needing 

 only to be diluted for use. Because of its dependency it is fast 

 replacing the home-made preparations. There are three common 

 brands upon the market in California under the trade names "Rex," 

 "Ortho" and "Orchard," though there are many other brands which 

 may be obtained elsewhere. 



In using the lime-sulphur it is very important to have just the right 

 amount of dilution. This is ascertained by the use of a Baume or 

 specific gravity hydrometer as shown in Fig. 474. The following 

 table has been worked out for the use of these instruments : 



TABLE SHOWING THE DILUTIONS FOR DORMANT AND 

 SUMMER SPRAYING WITH LIME-SULPHUR MIXTURES™ 



LIME-SULPHUR AND FLOUR PASTE 



For spraying trees in foliage and tender plants a lime-sulphur 

 flour paste spray has given remarkably good results. The following 

 formula? are recommended: 



No. l. 



Water 200 gallons 



Flour paste, 8 pounds flour in 8 gallons water 



Sublimed sulphur 10 pounds 



Lime-sulphur solution 2i gallons 



The flour is first made into a thin paste by adding one pound to 

 each gallon of water, according to the above formula. The sulphur 

 is made into a paste also and added with the flour paste and lime- 



S30 Parrott, P. J., Bui. No. 320, N. Y. Agrcl. Exp. Sta., 1909. 

 Parrott, P. J., and Schoene, W. J., Bui. No. 330, N. Y. Agrcl. Exp. Sta., 1910. 

 Stewart, John P., Bui. No. 115, Pa. Agrcl. Exp. Sta., p. 17, 1912. 



