86 
ORCHARD MOTH CATERPILLARS. 
waiting to give the mixtures recommended a trial,” decided that they 
could recommend the following :—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 ; * London-fluid, one part to twenty parts of water, f 
Both these they recommend as effective in destroying the caterpillar, 
while they did no material harm to the leafage. 
The proportion above mentioned should not be exceeded. Capt. 
Corbett, in finishing his report of the Toddington experiments at the 
above meeting, mentioned that, “ With regard to Apples, it seemed 
to them that the foliage was much more tender than that of Plum 
trees, and they thought that one ounce of Paris-green to twenty gallons 
of water was the proper preparation for them” (i. e., for Apples, Ed.). 
“He wished to be very guarded about the blossom. He was only 
speaking of the foliage. The Pears should be treated as the Apples 
were.” Mr. Masters added to the observations, on the part of the 
Committee, that they considered the syringing should be done when the 
leaf bud was first developed, before the blossoming period, and then 
again after the blossoms had disappeared and the fruit was forming. 
The following note, sent me by Mr. Wise from Toddington, in order 
that I might be able to report results of our work to the Seeds and 
Plants Diseases Committee of the Royal Agricultural Society of 
England, on the 3rd of June, confirms the previous observations :— 
“We have, as you know, tried all sorts of mixtures, and I do not think 
it is worth while troubling you with all particulars of them, as they 
were all useless, or nearly so. Paris-green is the only thing which we 
have found really efficacious. For Plums the proportion is 1 oz. to 
10 gallons, and for Apples 1 oz. to 20 gallons. We have also used the 
former strength for Currants, but as the foliage is within the last few 
days becoming so much stronger, we have been using it at 1 oz. to 
8 gallons. Neither of these solutions has damaged the foliage, but 
killed the caterpillar.”—(C. D. W.)J 
The following remarks, sent early in the year by Mr. Fletcher, 
Dominion Entomologist of Canada, who assisted us greatly by his 
* “ Paris-green paste.” Arrangements have been made by which the Paris-green 
powder may be furnished in a slightly damped condition, so as to do away with all 
danger of the dust being inhaled in mixing. 
f “ London-fluid.” This is a fluid form of the arsenical preparation known as 
London-purple,” prepared by Messrs. Hemingway, London, who liberally pre¬ 
sented a large supply for experiment. It is preferred by some orchardists to the 
Paris-green, and, as will be seen in the following notes, was used with success in 
some instances. But the experiments of the Committee pointed to the Paris-green 
as being more reliable. 
X Notes with regard to un -desirableness of spraying on the blossom, also as to 
serviceable kinds of engines, or apparatus for delivery of the spray, and other 
necessary details, will be found under their respective headings. 
