260 INSECTICIDES, FUNGICIDES, AND WEED KILLERS. 



and let themselves fall on the ground after spraying with bouillie 

 bordelaise (Sonnino). The Eriocampa adumbrata (slu^'-worm or slimy 

 caterpillar), the caterpillar of the Liparis cJirijsorrhea, L., that of the 

 Gastropacha neustria (the lackey or barred tree lackey moth), are 

 killed, according to Goethe, by the absorption of the blued leaves. The 

 Leptinotarsa decemlineata (Colorado beetle) may be overcome by bouillie 

 bordelaise. The trees sought after by the anthonome of the apple- 

 tree may be pi'otected by spraying with bouillie bordelaise (Montillot). 

 The vines treated regularly by bouillie bordelaise are abandoned by 

 the Altise and the Pyralis (d'Andoque de Seri^ge, Martini). In general 

 injurious insects are seen to diminish greatly in gardens where the 

 trees are treated with cupric bouillie. Debray advises spraying with 

 2 per cent bouillie bordelaise to destroy Cassida viridis, L. (coleoptera 

 injurious to artichokes) and the caterpillars of the Pierides, injurious to 

 the crucifers, rapes, cabbages, turnips, etc. This preparation has also 

 been used successfully against the gooseberry saw-fly, Tenthredo Gros- 

 sularice. .It also diminishes the number of the Eriophyes Piri, Pgst., 

 which cause the " cloque " of the pear-tree, and destroys the insect in- 

 jurious to melons and vegetable marrows, Diabrotica rittata, Fab. 

 (Sirrine). Its action is less decisive against plant lice and cochineals. 

 By suppressing the fruit-tree smut, which accompanies the invasions 

 of the cochineals of the olive-tree, orange-tree, rose laurel (Pastre), and 

 vine (Targioni-Tozzetti), it removes the greatest infliction incidental 

 to the parasiticism of insects. Bouillie bordelaise does not, however, 

 suppress the cochineal. Bouillie bordelaise is regarded by Dr. 

 Menudier, Mohr, and D'Angelo as sufficient to remove the phylloxera. 

 D'Angelo has used this process in the island of Elba with full success. 

 The treatment comprised two sprayings of the stock with a bouillie 

 bordelaise of 1-8 per cent blue vitriol and 1 per cent lime, and three 

 sprayings with a 5 per cent solution of blue vitriol containing sulphur. 

 Bouillie bordelaise is not frequently used for the destruction of insects, 

 because it is not so energetic in its action as poisonous substances. 

 Bouillies with a Scheele's green or emerald green basis, which contain 

 both copper and arsenic, are preferred. Bouillie bordelaise possesses, 

 to a certain extent, the insecticidal properties of arsenical bouillies. 

 It likewise acts on the stomach of the insects which absorb it. To 

 intensify its action organic insecticides are added to it ; thus IMartini 

 reports that 2 per cent bouillie bordelaise, to which l-o per cent of 

 rubinia or carbolated tobacco juice was added, instantaneously kills 

 cochylis of the vine. After one of these sprayings there were only 

 5-61-7 -87 per cent of grapes with caterpillars, whilst after a single 

 treatment with pure bouillie bordelaise, there were still 24 per cent. 



