• R. Kenneth Horst

Walnut (Juglans) (Includes Butternut, Black, English, and Japanese Walnuts)

  • Anthracnose; Leaf Spot. Gnomonia leptostyla (Marssonina juglandis), general.

  • Bacterial Blight. Xanthomonas juglandis, NY to GA, TX, and Pacific Coast, especially on English (Persian) walnut.

  • Bacterial Canker. Erwinia nigrifluens, CA; E. rubrifaciens, phloem canker, CA; Sirococcus clavigignenti-juglandacearum, NC.

  • Bacterial Crown Gall. Agrobacterium tumefaciens, occasional.

  • Blight, Leaf. Cylindrosporium juglandis, AL and TN to TX, CA.

  • Blight, Seedling. Sclerotium rolfsii, TX.

  • Canker. Sirococcus clavigignenti-juglandacearum to Ophiognomonia clavigignenti-juglandacearum, Ontario, Canada; Phomopsis oblonga, CT.

  • Canker; Branch Wilt. Hendersonula toruloidea, connected with sunburn.

  • Canker; Dieback. Diplodia juglandis, widespread; Dothiorella gregaria, CA; Exosporina fawcetti, wilt, CA; Melanconis juglandis, widespread, especially in East; Nectria spp., widespread; N. galligena; Cytospora sp., AZ.

  • Canker; Felt...


Powdery Mildew Leaf Spot Rhizoctonia Solani Angular Leaf Spot Ring Spot 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • R. Kenneth Horst
    • 1
  1. 1.Plant Pathology and Plant Microbe BiologyCornell UniversityIthacaUSA

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