Goat Moth Larva attacking l Vi l lows. 113 
The times to fumigate for Mealy Bug are (a) betore the vines 
bloom ; (b) after the crop has been gathered. 
The house should be well ventilated lor at least one hour alter 
fumigation before anyone should go into it, the windows being 
arranged so as to open from the outside, and also the door. 
The cost comes to about 4 cl. per 1,000 cubic feet. This treatment 
has been found not to damage even maiden-hair ferns if carried out 
properly, and there is no danger if proper precautions are taken. It 
is not advisable to leave the treatment to ignorant people, as the 
fumes and the cyanide are of course deadly poisons. 
SUB-GROUP B. ANIMALS WHICH CAUSE INJURY OR 
DISEASE TO MAN’S VEGETABLE PLANTATIONS. 
Section III. 
Animals Injurious to Forestry. 
Goat Moth Larvae attacking Willows. 
Mr. W. S. Mockett, of Ramsgate, wrote in September regarding 
the damage to willows by the larvae of the Goat Moth. Several other 
correspondents have also applied for information both in regard to 
their life-history and ways of destroying the larvae. Ash, oak, elm, 
as well as fruit trees, are attacked by these large larvae, and they 
frequently kill the trees outright. 
If there are not many Goat Moth larvae in a tree it is quite 
possible to destroy them. This may be done in several ways ; the 
old plan was to insert a wire into the opening of the tunnel to find 
out which way the tunnel goes, and if downwards use a fluid, if 
upwards a gas. 
The best fluid is paraffin emulsion, with a little Paris-green 
injected by means of a syringe, the nozzle being forced into the hole 
and surrounded by clay until the injection is over. If a gas or fume 
is used, sulphur acts well ; use bee-bellows and blow the fumes in, 
fixing the nozzle as before with clay. 
About June, smear the trunk of the tree with cow-dung and clay, 
mixed with paraffin, as far up as holes are found ; this prevents egg- 
laying. By far the best plan lias recently been found in the use of 
cyanide of potassium. Place a small piece of stick cyanide in each 
hole and then close up with clay. The fumes soon kill the larvee 
within tlieh tunnels. 
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