i'>0(it Moth LarViC (ittnikiii!^ U'ilhrivs. 113 



The limes to l'uiiii;,Mte tor Mealy l>u<; are («) Wel'oie the vinen 

 bliKtm ; (/>) after llie cinp has heeii j,'alhereil. 



The house shouM he well ventilated lor at least <iiie hour after 

 fuini<,'atiou before anyone should «,'o into it, the win(U)Ws heinj^ 

 arrani^eil so as to oj»en from the o\itside, and also the tloor. 



The cost comes to alutut 4</. per 1,(JIHI cul»i(' feet. This treatment 

 has l)een fouml not to damage even maiden-hair ferns if carric<l out 

 properly, and there is no dan^^er if projMjr precautions are taken. It 

 is not advi.sable to leave the treatment to ignorant i>eople, as the 

 fumes and the cyanide are of course deadly ixtisons. 



suB-dKorr /;. animals which cause ixjcky 01: 



DISEASE TO MAN'S VEGETABLE PLANTATIONS. 



Section III. 

 A-Ni.MALs Injurious to Foke.stry. 



Goat Moth Larvae attacking Willows. 



Ml. W. S. ^Mockell, of liiim.sgale, wrote in September regarding 

 the (himage to willows by the larvie of the (Joat Moth. Several other 

 coiTCspondcnts have also a}»plied 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 lavji" larva", and thov 

 frequently kill the trees outright. 



If there are not many (Joat Moth larva^ in a tree it is (juitc 

 possible to destroy them. This may be iloue in seveml 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 

 ui)wards a gas. 



The l>est fluid is pai-aflin emulsion, with a little Paris-gitjen 

 injected by means of a syringe, the nozzle being force<l into the hole 

 and suiTounded i»y clay until the injection is over. If a gas or fume 

 is used, sulphur acts well ; u.se l>ee-l)ellows and blow the fumes in, 

 fixing the nozzle as bef«ire with clay. 



About June, smear the trunk of the tree with cow-<lung and day, 

 mixed with ]iaraflin, as far up as holes are found ; this pix'vents egg- 

 laying. r»y far the best plan has recently been found in the u.se of 

 cyanide of pota.ssium. Place a small i)iece of stick cyanide in each 

 hole and then close up with clay. The fumes •<oon kill the larva- 

 within their tunnels. 



I 



