Good day,
the Russians never called Ju-87 - "Lopata" (spade). Also incorrectly translated nicknames 'Boot' or 'Clog'.
Most often the Ju-87 Russians called "Laptezhnik ("clad in Russian bast shoes"), as already said Paul. Rarely are the nicknames "Lapotnik" (same thing), or briefly "Lapot'".
It seems in the photo?:
http://i.blog.fontanka.ru/photos/201...ehjuR499jW.jpg
Also refers to the nicknames "Pevun" (Songster) and "Muzikant" (Musician) for the characteristic sound when the Ju-87 swooped down.
The pilots of the VVS RKKA in the memoirs and reports usually called Ju-87 is much easier - "Junkers".
Once seen in the memoirs of the nickname "Gorbatiy" (hunchback), but it's more often used for Il-2.
regards,
Kirill