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13 The root of the problem - Coggle Diagram
13 The root of the problem
phylloxera
a member of Hemiptera
invasion
places
1875 -- Australia
1886 -- South Africa
1860s -- France
solution
graft European vines onto the imported roots of American ones
theory of its journey in the past
:red_cross:British gardeners should be responsible
brought American vines to European
south of the France
recent research with phylloxera' s genome
team of Claude Rispe and Fabrice Legeai
compare the genetic sequence
narrow the search to the Mississippi Valley
strikingly similar genetic sequence between two populations
V.riparia was the bug's original host
the upper Midwest was its source
keep going south following the river (Paul Nabity)
Francois Delmotte
(if correct) fits with certain historical facs
many French settlers still stayed in the area once they annexed
the trading links with New Orleans was retained
V.riparia could store in cool, dry hold
Maybe it was imported to cure blight
Rispe
there had been only one or two introductions
Astrid Forneck :question:
separate introduction
the Austro-Hungarian empires experimental vineyards at Klosterneuburg
future work
tease out what each of those genes does
how phylloxera manipulates a plant and adapts to a new host