840 CONNECTICUT EXPERIMENT STATION REPORT, I907-I908. 



Robertson Company of Manchester, Conn., and sold as "Jarvis 

 Spray Mixture" at thirty cents per gallon by the barrel. 



Other Oils Tried. 



A five-gallon can of the soluble oil made by the Thomsen 

 Chemical" Company of Baltimore, Md., was used in the Plant 

 orchard at Branford. It worked satisfactorily and the trees were 

 clean in the fall. 



"San-U-Zay" scale oil, made by J. T. Southwick of Rochester, 

 N. Y., was also given a trial. This oil requires a solution of 

 sal soda to make it emulsify, but it seemed to work nicely, and, 

 like the preceding, kept the trees clean. Both of these oils were 

 used in the same proportions as the home-made oils mentioned 

 above. 



Another kind of oil was sent us by Professor H. W. Hillyer 

 of Farmington. This came in two parts; one, marked "B," 

 was the oil preparation, and the other, marked "A," contained 

 the emulsifier, together with a copper solution which was supposed 

 to make it a fungicide. This was also used one part to fifteen 

 parts of water, and four small scale-infested apple trees were 

 thoroughly sprayed with it. When examined the first week in 

 July, about twenty-five per cent, of the scales were alive. It is 

 evident that this mixture should have been used in more con- 

 centrated form. 



New Prepared Lime and Sulphur Washes. 



Since our work with the lime and sulphur mixtures a few years 

 ago (see Reports for 1903, p. 233; 1904, p. 221; 1905, p. 196; 

 and 1906, p. 279) several prepared lime and sulphur washes have 

 been placed upon the market. Some of these we have tested and 

 a few gave good results, but most of them contained so much 

 sediment that they did not spray readily, failed to destroy the 

 scale, or else were so costly as to be prohibitive. 



Recently there have been put upon the market a number of 

 prepared lime and sulphur washes which are clear liquids, that 

 is, entirely soluble, and contain no sediment to clog strainers and 

 nozzles. Some of these are being sold at a price low enough so 

 that orchardists are buying them to spray orchards of several 

 thousand trees. 



