Publications for:

pest = Phytoplasma asteris
crop = Onion/garlic/leek (Allium)
country = U.S.A. (mid S)

found 2 publications:

2003

Ecological implications from a molecular analysis of phytoplasmas involved in an aster yellows epidemic in various crops in Texas
Phytopathology (2003) 93 (11), 1368-1377
publishers website - pestinfo wiki

2001

First report of a member of aster yellows phytoplasma group and of clover proliferation phytoplasma group associated with onion in Texas
Plant Disease (2001) 85 (4), p. 448
publishers website - pestinfo wiki