COPPER ACETO-ARSENITE. 275 



gigantic spraying machines and powerful pumps mounted on trucks 

 are required, capable of throwing a jet to the top of the tallest trees. 



Epdachiia or Coccinella globosa, 111., is destroyed by spraying 

 emerald green in powder on the plants (Sajo). Likewise— 



Agriotes llneatus, L. (wire-worm) ; Entomoscelis adonidis, Pall. 



Weevils. — Stift advises spraying the ravaged plants. 



Scolytes. — Fletcher advises coatmg the tree with oil paint contain- 

 ing emerald green. 



Chaetocnema tibialis, 111. — This altise, injurious to beets in 

 Hungary, may be destroyed by 0'185 per cent emerald green (Gemesi). 



Cleonus stUcirostris, L. — This beetle, injurious to beets, may be 

 overcome by 0*5-2 per cent emerald green bouillie. The first spraying 

 ought to be done as soon as the leaves appear, the second at the time 

 the insects copulate, say near end of May. 



Solenoijsii gcminatiis. — This ant, which does much damage to the 

 young shoots of peach and plum trees, may be combated by spraying 

 with bouillie bordelaisj containing 0-05 per cent of emerald green and 

 4'5 per cent of molasses. 



The larvae of the Tenthredos (saw-fiies) are successfully overcome 

 by cupro-arsenical bouillies. 



Nematus Bibts, Scop, (gooseberry saw-fly). — This insect is success- 

 fully overcome in Canada, likewise N. Pallidiveiitris. 



Eriocampa adumbrata (cherry-tree saw-fly). — Coquillet successfully 

 used a cupro-arsenical bouillie rendered adherent by the addition of 

 pine resin dissolved in potash. 



It is easy to destroy caterpillars by spraying with cupro-arsenical 

 bouillie, for these insects are then the victims of their voracity. The 

 butterflies most injurious to arboriculture which have been treated 

 most successfully belong to the Tortricides, to the Pyi-alides, and to 

 the Tmeides. 



Carpoca2)sa pomonella (coldlin moth). — The damage caused by 

 this pyralis is considerable. Action must be taken to destroy it very 

 soon after the hatching of the caterpillar, for it lives on the leaves 

 until the apples are big enough to be penetrated. The first spraying 

 should be made after the fall of the flow^er, and the second a week 

 later, before the calyx is re-closed and the fruit reversed on the stem, 

 "■praying during flowering must be avoided, for it would destroy the 

 insects which fertilize the flowers, and render the litter barren.^ 



Carpocapsa funebrana (pyralis of the plum-tree). -Spraying with 

 cupro-ai'senical bouillie made at the moment of the fall of the corolla 

 of the flowers and on the young tied fruit poisons the grubs before 

 they can pierce inside the frui . 



Hyjyononieuia malmella. Jell (small ermine moth of the apple-tree). 

 — Emerald green sprayings are in general use in certain countries. 



Agrotis segetmu (common dart moth). — To prevent the damage 

 caused by this voracious grub, which is called the grey-worm, it 

 suffices to make a cupro-arsenical spraying on the young spring shoots 

 threatened. It is not a case of beet crops alone which have been pro- 



1 Translator's iVo^t?.— Spraying during flowering courts risk of enclosing poison 

 in core of apple. 



