Grape culture in California : its difficulties, phylloxera and resistant vines, other vine diseases ; Improved methods of wine making . Fig. 10. Riparia x Berlandieri half natural size. (Mataro) and aRupestris. It is,perhaps, the mostwidely planted ofall the Americanvinifera Gervaisdescribes it as Astock character-ized by its ex-treme vigor, rapiddevelopment, easeof rooting andgrafting, and thefruitfulness of itsgrafts. It is par-ticularly suitedto deep, rich,humid, clay soils,and makes excel-lent unions withall varieties ofvinifera. The vine isfruitful, bearinglarge n
Grape culture in California : its difficulties, phylloxera and resistant vines, other vine diseases ; Improved methods of wine making . Fig. 10. Riparia x Berlandieri half natural size. (Mataro) and aRupestris. It is,perhaps, the mostwidely planted ofall the Americanvinifera Gervaisdescribes it as Astock character-ized by its ex-treme vigor, rapiddevelopment, easeof rooting andgrafting, and thefruitfulness of itsgrafts. It is par-ticularly suitedto deep, rich,humid, clay soils,and makes excel-lent unions withall varieties ofvinifera. The vine isfruitful, bearinglarge numbers ofsmall, round,bluish-black The leaves resemble Rupestris,and unlike most crosses contain-ing vinifera, its resistance toPhylloxera is quite sufficient andsuperior to that of Lenoir. It isvery vigorous and roots easilyfrom cuttings. It is somewhatdifficult to graft, but when suc-cessful the grafts make goodunions and are vigorous andfruitful. Its chief merit is thatit succeeds in wet, compact soils,where most other varieties fail. Mourvedre X Rupestris 1202(Pig. 14).—This variety is across between the Mourvedre. Fig. 11. x Riparia 1616. One half natural size. Bulletin 197. GRAPE CULTURE IN CALIFORNIA. 147 grapes. It is grown extensively in France, Spain, Sicily, Portugal,and Roumania, and has given good results wherever tried. In Cali-fornia its vigor is remarkable, exceeding even that of RupestrisSt. George. OTHER VINE DISEASES. Oidium.—The cause and treatment of this disease have been dis-cussed in Bulletin 186, and the recommendations in it have been
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