California grape phylloxera more variable than expected | Zendy

J. Granett | Zendy; Michael Walker | Zendy; John De Benedictis | Zendy; Genine Fong | Zendy; Hong Lin | Zendy; Ed Weber | Zendy

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California grape phylloxera more variable than expected

Author(s) -

J. Granett,

Michael Walker,

John De Benedictis,

Genine Fong,

Hong Lin,

Ed Weber

Publication year - 1996

Publication title -

california agriculture

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.472

H-Index - 25

eISSN - 2160-8091

pISSN - 0008-0845

DOI - 10.3733/ca.v050n04p9

Subject(s) - phylloxera , rootstock , pest analysis , biology , vitis vinifera , horticulture

Many strains of grape phylloxera now have been identified in California vineyards. This variability may be the result of multiple introductions of this pest or of evolution of new strains on susceptible or weakly resistant rootstocks. Thus own-rooted vines, weakly resistant rootstocks and those with V. vinifera parentage should not be used in phylloxerated areas. In addition, because of the observed variability, quarantines are ineffective in preventing the occurrence of biotype B phylloxera, as it appears to evolve independently in different areas.

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