Publications for:

pest = Alternaria alternata
crop = Walnut/butternut (Juglans)
country = Italy

found 2 publications:

2009

An expanded multilocus phylogeny does not resolve morphological species within the small-spored Alternaria species complex
Mycologia (2009) 101 (1), 95-109
publishers website - pestinfo wiki

1999

First report of Alternaria alternata causing leaf spot on English walnut
Plant Disease (1999) 83 (7), 696
publishers website - pestinfo wiki