Kcporfs to the I^ocwi/ of A i^r'uitltiirc. 33 



must l»o i)iU in the earth U-tween the iihmt-s. Cure must be tuken, 

 as it is of an innanimaltle nature and the fuine.s an' also jxtisonuus. 



(ii) Tnippiiif,' hii-«,'ely eniphiye*! for wii-e-wonn consists of iihicinj;; 

 pieee.s of carrt)t, nianjjel, l>eetriM»l or turnips in the ;;n>untl, ami takinj^ 

 thenj up even' few ihiys and coUeetinj,' the wire-worni that are 

 feeding' uimhi the " huit." Milleiwdes may adso Ikj cauj^ht in thus 

 way, luit fttr them hir-^'e holhtw, more or h"^s rotti'n, nxtts form the 

 l)est trap. It has also lu'en fountl that the small mille|M'des {Julns 

 jyulchillus) may l»e cauj^ht in numhei-s by placing cabha;,'e leaves 

 soaked in a solution (1 oz. to the gallon of water) of Paris green 

 on the ground. The milleiM.Mles come to the surface at night and 

 feed ujxtn the leaf and are so iM)isoned. 



Bisulpliide of carlton treatment is ln'st ; failing that, some go<Kl 

 may be done by tnipping by means of ground bait. 



Directions for the Employment of the Gas 

 Treatment under Glass. 



Several enquiries have lH.'en received concerning the destruction 

 of greenhou.se pests. 



Various metluKls of fumigating plants under gla.ss are employed, 

 such as sulphur fumes and tobacco smoke. Neither of these are as 

 goml as the employment of hydn»cvanic acid gas. For Aj»hi«les, 

 Red Spider, and "Wood Lice the following quantities are nece.ssiiry : 

 2 ozs. of cyanide, 4 ozs. sulphuric acid, 7 ozs. of water i)er lOOU 

 cubic feet of space, rnneed as follows: Potir the water into a jar, 

 then add the acid to the water. AVnip up the cyanide in a j)iece of 

 blotting-pa|)er and droj) it into the jar »»f acid and water fn>m «iutside 

 the house. This can l>e done by tying the cyanitle bag on to a stick 

 with a longish piece of string, then close the d<M»r or window. Ix-ave 

 the house shut up for at least thive-ijuartei-s of an hour, then »»j)en all 

 diMjrs and windows to ventilate freely; Ihj caivful not \u enter the 

 house for at least an hour after the dooi-s and windows have l»een 

 thrown o|>en. Fumigate at dusk an<l when the foliage is iliy. The 

 lem|)ei-ature must not U- al»ove GO F. The In'st temjH'nUuiv is 

 50' F. ; above fit) F. the folijige gets scorched, as it also (U»es if y«Mi 

 fumigate in bright light. If the house is moiv than 10,000 cubic 

 feet two jars wouhl l>e neces.sary, but up to that size «)ne is am]>le. 



The result of one exjK-riment may 1h> quoted here. (.Jrwnhousf, 

 2,000 cubic feet, containing ('hr>sanlhennims in full bUMim. .severvly 

 infested willi (In-en Fly. Cyaniile 3^ ozs., acitl o ozs., water '.» ozs. 

 Tenn»eraturu 50^ F. Time 2"» minutes. 1 hour after sun-^el. 



It 



