mesorah of Esrog

I saw in one sefer of minhogei Ashkenaz, that the massoures in Ashkenaz is to use Etrogei Kalabria (Yanove). What about to use the Eretz Israel's Etrogim? And if the etrog (Israeli) is from an tree planted with a Yanove's seed?

Toda

Meir

I've read that some say that the special chezkas kashrus that the Chasam Sofer and other Rabbonei Askenaz gave to the Yanove Esrog has sadly disappeared. Specifically, during the period of WWII when Genoa was occupied by the Nazis ימ"ש, and Jews couldn't go out to tend to the esrog pardesim, the claim is that, due to a shortage of other materials, non-Jews came in and used many esrogim to make cosmetics, and (I'm not clear on this point) either definitely or possibly were markiv many of the trees with lemon trees in order to strengthen the esrogim.

Melech

Uau! This is very strong!
To see if it is murkov, aren't there some signs?

Meir

Michael wrote: In Eretz Yisroel you cannot find Yanove Esrougim outside of Kfar Chabad, and there are questions about them.

One of the questions is that of Dina D'malchusa Dina. Since the Italians forbid the export of their esrogim from the country, it might be osur to use one.

MPerlman