Reports to the Foreign Ojffice. 167 



Imck ; tliev nre laid on 1x4 Inianls, jtreviouHlv nuilwl t<> niiiners ; the 

 bi'iirlit of the i>jiiis tilM)ve the '^'rouiul varies with the hcij^ht of the crop 

 over which the " hopiter do/.er " will Ik." Uikeii. 



TIjc \\\\\ should Ik- jKirtly lilled with j«irafliii and water and taken across 

 the infected crops until full, when fresh oil and water must Ixi adde<l. 



These machines can l)e made of any size. 



r>. ;!. MixKKAL Poisons. 



Arsenicjil poisons oin Ix; employed to advantJi;re where animals are not 

 likely to t^^tuch them. In America ]>oisoned hnin is succt«sfiilly employed. 

 Mr. CiKpiillett (U.S. Dept. Ajrriculture) has found the followinjr fonnula 

 the best : 1 11>. arsenic, 1 lb. suL'ar, <". llw. bnin. Add water U) make an 

 ordinary mash. 



This is prepjiretl as follows : Mix the dry bran and arsenic in a tub, 

 dis.solve the suu'ar in warm water, and mix with the arsenic and bnin. 

 Place this mixture aUiuL in little heaps ; its uctiou is not rapid, but always 

 fatid iu alx)ut twenty-four hours. 



P>. t. TiiK African Locust Fungus {Empusa gryVi). 

 (Destruction by Fun.L'oid l)isea.se.) 



•V funirus known as Empiisa gn/Ui found on <rra8shop|>er8 and locusts 

 has l»een useil as a remetly with more or less success. \{» intriwluction into 

 Egypt mi>:ht probably Ik' very Iteneticial, and cerUiinly should l>e tried. 



It has ln-en imjiurted into Amerini from Natal, and has destroyed 

 injurious swanns of hx'usts in Colonido and Mississippi. 



Dr. liounsbiiry (Cajx: of C^Jood Hope Kept., is'.iC) refers to this disea.se 

 and it-s enijiloyment, and sjiys it causes destruction to the swarms when 

 projKT conditions of moisture are present. 



It hiis iK'en introduced into Australia and hius met with some success 

 there also. 



The method of employment adopted by Mr. Frogiratt. fiovernnient 

 Knt<Mnol(»gist to New S<tuth Wales, is here appeiuled. 



The fuuL'iis nuist be cultivated in a laboratory on u'elatine aud sent out 

 to ojHjmtors in test tid)es. 



The oiH.rat(tr j)rocee<ls as follows : — The fungus should l>e sent out in 

 detiuile qiumtities, enough of the culture to make a tumbler full of liquid 

 iK'ing a useful pnijxirtion. The oix-ratiir shouM boil sunicient wat<r and 

 let it cool down to luke-warm. The contends of the tuU' are then extnicteil 

 and mashe<l up with two teasj>oonfuls of sugar and well stirred tip in the 

 water with sevenil bits of c<irk, whiili have K-en previously i)liwi-<l in the 

 glass as indica^l^s. Cdver the tumbler with a sheet of pap«"r an<l then 

 place it in a wanu room and leave for twenty-four hours. When examined, 

 if fit ftir use, the cork indiaitors slioidd show mycelium growing on them. 

 This odture is taken to the infested land. Then jtnKtrd t<i (r:it<'h some 

 loCiists by means of a net. The ctUture jdaad in a tin is sjm-ad over the 

 loaLsts and they are rele;ise<l, when they csirrv" infe«ti<>n to others and «o 

 destroy myriads of the iKjsts. 



Mr. FrogL'att, (Jovernment Ki ' ' : of New S>uih Wales, >tate> 

 that one tumbler full i.f li(|nid is - r looo I.x'usts. 



