464 
RHYNCHOTA. 
Planchon and Lichtenstein, C.R. Ixxvii. pp. 461-463, state that migra- 
tions occur both on the surface and below, from root to root. Coulomb, 
op. cit. p. 346, records the progress towards the South, and Milne- 
Edwards, op. cit. p. 572, notes its extension to Cognac. 
M. Dunn, J. Hort. Soc. (n. s.) iv. pt. 13, pp. 49 & 50, states that the 
insect never lives more than 48 hours when isolated from the vine, and 
that it will touch no other plant. 
A somewhat comical view of this grave question is afforded by ' M. 
Molliere,' and ' M. Jourdan,' who inquire seriously whether it is quite 
certain " que le phylloxera vastatrix soit un puceron ? " Ann. Soc. Agric. 
Lyon (4) iv. P. -v., p. Ixxxix. 
" Resultats des divers procedes de guerison proposes a la Commission 
pour combattre la maladie de la vigne caracterisee par la Phylloxera, 
procedes qui ont ete appliques dans la domaine de Las Sorres, pres 
Montpellier," a publication of the Departmental Commission of the 
Herault, is stated to be printed in the Correspondence : C. R. Ixxvii. 
p. 1487. 
The following remedial and destructive methods, &c., are suggested : — 
Exposing eggs on the roots to the air ; Nourrigat, C. R. Ixxvi. p. 361. 
Submersion of the vine. A. Dumont, op. cit. p. 150, & Ixvii. p. 1287 
(by the establishment of canals near vineyards) ; Faucon, op. cit. Ixxvi. 
p. 361, & Ixxvii. pp. 663-665 (opposes submersion in the spring, and 
recommends it in autumn and winter, or during the whole winter) ; 
Faucon, Bazille, and Duponchel, Bull. Soc. Hortic. Var (7) i. No. 3; 
Dumas, C. R. Ixxvi. p. 1454-1464 (submersion in early April with hot 
water, or water charged with deleterious substances) ; Gueyraud, op. cit. 
Ixxvii, p. 161. 
Sea-water ; A. Babret, C. R. Ixxvii. p. 1287, L. Lechape, p. 1016 (with 
bruised garlic !). Saline solution ; Gaudin, C. R. Ixxvi. p. 1133. Sulph- 
uric acid ; Dumas, C. R. Ixxvi. p. 213 ; C. O. Keenan, op. cit. Ixxvii. p. 1221. 
Sulphate of carbon ; E. de Layal, C. R. Ixxvii. p. 601 & p. 715 (with 
vegetable oil), Dumas, op. cit. p. 520. Lecoq de Boisbaudran, p. 771, and 
A. Roussille, p. 772, consider this agent bad for the vines ; and E. Bazille, 
pp. 934-936, is dubious as to its effect, giving long quotations from Bull. 
Soc. Hortic. Var. Sulphate of copper and manure mixed ; A. Pagani, 
C. R. Ixxvii. p. 1093. Sulphate of potassium ; E. de Layal, ibid. Sulpho- 
hydrate of ammonia (also good as a manure) ; Dumas, I. c. p. 870. Sulphate 
of arsenic ; Merice, Bull. Soc. Hortic. Var. (7) i. No. 3. Powdered sulphur 
and alum : A. Sarrand, C. R. Ixxvii. p. 562. Soluble sulphates and smoke ; 
H. Mares, op. cit. p. 870. Vapour of sulphur and common gas ; Lebou, 
op. cit. p. 603. Water from gas-condensers; Beaume, op. cit. p. 1177. 
Coal-tar; L. Petit, op. cit. pp.193 & 1176. Petroleum; Stagno Colombo, 
op. cit. Ixxvi. p. 1133. Ammonia; Gueyraud, op. cit. Ixxvii. p. Ill, Deleuil, 
p. 346, Petit, p. 193 (ammoniacal-water and lime). Fermented urine in 
November and March ; Gauthier, op. cit. p. 346. Fermented soap-lye ; 
H. Peyraud, ibid. Potash, sulphur, and soap ; Letellier, op. cit. Ixxvi. 
p. 1 1 33. Mixture containing cyanide of potassium ; A. Milius, op. cit. 
Ixxvii. pp. 1336 & 1549. Carbolic acid and soot, applied thoroughly ; C. 
V. Riley, Rep. Ins. Mo. v. pp. 57-73. Smoke ; Gagnat, C. R. Ixxvii. p. 772. 
