52 Second Report on Economic Zoology. 



if properly mixed, and it will not harm the foliage even if put on 

 concentrated ; anyhow a normal wash has not the least injurious effect 

 on the leaves. 



Another feature noticed in Paris green spraying is that ir 

 damages the leaves most readily when applied with force. 



BoiiUEAUX MiXTUKE AND PaEIS GrEEN. 



Mr. K. Town tSniith, of Yalding, wrote in April stating that he 

 had been washing with Bordeaux mixture, and would be very much 

 obliged to know if there is any danger to sheep eating the grass 

 under apple trees sprayed with Bordeaux mixture. The mixture 

 being made of 4 to 6 lbs. of copper sulphate, the same quantity of 

 lime to 40 gallons of water, and " have not put in," writes Mr. Town 

 Smith, " any Paris green at present this season. Do you consider 

 Bordeaux mixture and Paris green any good against AjjJiis 1 " 



The following information was sent : — 



" With regard to keeping stock under trees sprayed with Bordeaux 

 mixture, I do not think there can be any danger. You can do so 

 with impunity when you have sprayed with Paris green. 



" As no direct experiment has been conducted ofiicially with 

 Bordeaux mixture, I can only give my private opinion, and that is 

 that the quantity used, just as in Paris green, is so small that it 

 cannot hurt animals feeding below. 



" Bordeaux mixture and Paris green are quite useless for all 

 A'plhidcs. 



" For Aphides you must use soft soap — soft soap and quassia, 

 or paraffin emulsion, or you may use soft soap alone — which I have 

 always found sufficient for Aphis, but quassia undoubtedly clears the 

 leaves of Aphis excrement." 



Geneeal Wash for Fruit Trees. 



Later (9/5/03), Mr. K. Town Smith wrote requesting informa- 

 tion regarding a general wash for insect pests. The following reply 

 was sent : — 



" The best general insect wash for fruit trees is made as follows : — 



" A. (1) Dissolve 1 oz. of arsenate of soda in soft water, and add 

 16 gallons of soft water and stir. 



'• (2) Then dissolve 3 ozs. of acetate of lead in soft water and add 

 it to the above ; (1) still keep stirring until both are well mixed. 



" B. Dissolve one quart of soft soap in two quarts of boiling soft 

 water. Eemove from lire, and when still hot add 1 pint of paraffin ; 



