PARIS-GREEN. 73 



There are difficulties in the way of any new application, but we 

 have plenty of evidence, given in long detail, with the well-known 

 names of the experimenters attached, of the success with which the 

 application can be used ; and we have any amount of evidence that 

 there is nothing else which has been found to answer in this country, 

 save this mixture, to make a thorough clearance, at one or two sweeps 

 of spraying, of the hordes of all the various kinds of caterpillars which so 

 long have devastated our orchards early in the year at their pleasure. 

 London-purple may very likely be found in time to answer as well, or 

 even better, but as yet we have not such full record of experiment ; 

 and this, like Paris-green, is a poison. 



Attention to directions necessary for success. — The use of Paris-green 

 has been spreading more widely, and, so far as I can judge from the 

 reports sent me, the spraying is successful where the directions issued 

 are followed. But the difficulty is immense in getting this matter 

 attended to, and consequently trouble arises. 



Two years ago the use of Paris-green spraying was almost or quite 

 unknown in England, but since then our own experience has confirmed 

 that of many years of American application in showing the success, 

 WHERE USED ACCORDING TO DIRECTIONS ; and the following list of disasters 

 and their causes, arising simply from non-attention to directions, which 

 has been placed in my hands by a well-known fruit-grower, is emi- 

 nently instructive. I give it throughout almost in his own words, and 

 append to each paragraph of it extracts from my own pamphlet on the use 

 of Paris-green, to show how in every case attention to the " Directions " 

 quoted from it would have saved the disasters. 



Difficulties noticed. 1st. '^ I find that growers, ivhen confronted with a 

 strong attack of the caterjntlar, get impatient to destroy them, and use the 

 Paris-green in a stronger j^rojwrtion than ivhat is recommended.^' 



DIRECTIONS. — " The amount of Paris-green found serviceable 

 by the Evesham Fruit Pests Committee, and which they decided 

 they could recommend, was : — Paris-green paste in the proportion 

 of 1 oz. to 8 or 10 gallons of water for Plums;* and 1 oz. to 

 20 gallons of water for Apples. Apple leafage was found to be more 

 tender than that of Plums. Pear leafage should be treated like that 

 of Apple. 



" For Currants the strength found safe was the same as for Plums 

 — 1 oz. of ' green ' to 10 gallons of water ; but as the foliage grew 

 stronger, 1 oz. to 8 gallons of water was found not too strong. Neither 

 of these strengths of mixture damaged the leafage, but they killed the 

 caterpillar. 



•' Capt. Corbett, the Superintendent of the Toddington Fruit 



* See note regarding safe strength for Plums at p. 71. 



