96 
WILLOW. 
On the 25th of June Mr. Cameron noted further, relatively to 
estimate of value of Willow crop :— 
“ I mentioned that there may be about fifty acres of Willows grown 
in Lymn district, and I feel x>retty certain that unless means had been 
taken early to suppress the beetle, the whole crop, on an average, I am 
told, worth about £1000, would have been lost. The sum, however, 
means only the loss of the crop for one year; and, if this should 
happen, the old stocks would not live; consequently the land would 
require trenching, paring, and burning and replanting the following 
year, the replanting alone costing something like £15 an acre, and 
still the risk of being eaten up afterwards. 
“ I am glad to say that little damage is being done at 'present, and 
the Willows are growing well; but, from the quantity of eggs and grubs 
showing on the leaves, I fear the outbreak will recur again in the course 
of a few weeks, when the Willows are tall and difficult to deal with. 
“ Picking has been the chief remedy resorted to, but I have got a 
ten-gallon can, made pretty much on the lines of the one recom¬ 
mended in a report you sent to Mr. Melvill for distributing Paris-green 
solution.* 
* The method of operation alluded to is mentioned in Prof. Riley’s ‘ Seventh 
Missouri Report ’ (1875, p. 15), and is as follows:—“ It consists of a can capable of 
holding about eight gallons of liquid, and so formed as to rest easily on the back, 
to which it is fastened knapsack-fashion by adjustable straps, which reach over the 
shoulder and fasten across the breast. To the lower part of the can are attached 
two rubber tubes, which are connected with two nozzles or sprinklers. The inside 
of the can has three shelves, which help to keep the mixture stirred. There is a 
convenient lever at the bottom, which presses on the tubes and shuts off the out¬ 
flow at will, and two hooks on the sides near the top on which to hang the tubes 
when not in use. On the top is a small air-tube and a capped orifice. Two 
bucketsful of water are first poured into the can, then three tablespoonfuls of good 
green, well-mixed with another half-bucketful of water, and strained through a 
funnel-shaped strainer, which accompanies the machine, and the use of which 
prevents the larger particles of the green from getting into the can and clogging up 
the sprinkler. Five to eight acres a day can readily be sprinkled by one man using 
the can, and from one to one and a half pounds of good green, according to the size 
of the plants, will suffice to the acre.” 
With regard to amount of Paris-green which may safely be used, it is stated that 
“ when in liquid suspension (for Paris-green is insoluble in water) a half-pound may 
be mixed with forty gallons of water. Double this amount of green, or, in house¬ 
hold measurement, a tablespoonful (a little over an ounce and a half) in a pailful of 
water (four gallons) is often used on many plants without injury when more active 
results are desired.”—‘ First Annual Report of Consulting Entomologist of the State 
of New York,’ p. 27. 
The above proportion appears to be about a third weaker than that noted as 
mixed, consequentiy it would be as well to experiment as to desirable strength. The 
Paris-green being arsenite of copper, and consequently a deadly poison , requires to 
be kept and also mixed under careful supervision, especially if there are children 
about, as the beauty of the colour is very attractive. The price has been reported 
to me as 6 d. per pound retail.— Ed. 
