Fireblight and Disease Ratings

Don’t believe this link to FB and disease susceptibility to many Apple varieties has been posted on Growing Fruit

The information from 9 mostly University sources was compiled by Cornell.

The chart also shows the source of the information.

I noticed the FB ratings vary a lot, perhaps impacted by the climate where the information was gathered or perhaps the age of the trees

https://blogs.cornell.edu/applevarietydatabase/disease-susceptibility-of-common-apples/

4 Likes

Fuji, Braeburn, Winesap seem fairly accurate…hardly any of my other 95 or so apples are on that list.

Interesting how how some ratings vary depending on location, though I have always suspected that was the case. I see a couple that I definitely dont agree with for my location. Pink Lady is very susceptible to CAR here.

2 Likes

I really like the chart, but the listing seems to depend on who is looking at it. :thinking: Regarding Northern Spy and fireblight resistance:

Northern Spy Moderately Susceptible4; Moderately Resistant4; Susceptible7,9; Resistant8

A lot more variation that I would expect. Perhaps the various strains of the FB bacteria used by each university has something to do with it.