2<H THE FRUIT GROWER'S GUIDE. 



cattle and sheep from orchards for some time after spraying. Yet there is 110 danger 

 in the careful and judicious employment of Paris-green. The evidence of Mr. D. Lee 

 Campbell is conclusive on the point. In the Journal of Horticulture, May 14th, 

 1891, he states: "No doubt it is imperative that warning should be given as to 

 the handling of the poison, but that having been done, 1 am in the position, from my 

 large use of Paris-green in the powder, to affirm that the danger is practically nil. Last 

 year we used many pounds, and not having any proper mechanical sprayer, the distri- 

 bution was eifected by the hand, and although some 10 a-jres of bush trees were gone 

 over ten times, no one suffered the slightest injury or inconvenience. Now, by means 

 of a Stott's sprayer, wet hands are avoided. Then, as to danger from eating fruit so 

 treated : of course, bush fruit should not be sprayed, but when I tell you that 1 8 ounces 

 of Paris-green suffice to spray 10 acres of trees, that, of course, the bulk of the spray falls 

 on the leaves and a great part on the ground, and that the fruit is exposed for months 

 to all the washing of rain it must be admitted that the risk is not worth mentioning." 



The liability of Paris-green mixture to be washed off trees by rain has prompted the 

 addition of Hour paste to render it more adherent. Professor C. "V. Riley, in "Bulletin 

 No. 3" of the United States Entomological Commission, p. 57, states: "It pays to add 

 2 or 3 pounds of flour or starch to the mixture, not only from the greater adhesive- 

 ness which they give to the poison (a very desirable object in wet weather), but because 

 by their colour they help to indicate the quantity that has been distributed. In using 

 flour it will be found advisable to mix it first in a bucket of water, and allow it to 

 remain until it sours, the object being to prevent it from forming lumps." The quantity 

 of flour should be double the weight of the Paris -green. The flour aids the suspension 

 of the Paris-green, preventing the particles from settling, and admits of the mixture 

 being distributed by an ordinary syringe or garden engine witli a spray nozzle. With- 

 out the flour paste it is necessary to keep the mixture well stirred all the time of 

 its application, and to well wash the barrel out after using it half a dozen times. It 

 is important that all vessels used for holding Paris-green mixtures should be well 

 washed out after using. 



London -purple has long been used in America for the destruction of caterpillars, and 

 is considered by some growers superior to Paris-green on the score of economy, lightness, 

 greater diffusibility in water, adhesiveness to the foliage, and lt?ss poisonous nature. 

 Professor Eiley treats of it in the " Proceedings of the United States Department of Agri- 

 culture " as follows : " London-purple, ^ pound ; flour, 3 quarts ; w r ater, 40 gallons. The 



