You should add this mod's crop produce items to #forge:crops. This tag is notably used by Create: Crafts & Additions for one of its biofuel recipes, and is supported by Farmer's Delight.
The items you should add to this tag are
"culturaldelights:cucumber",
"culturaldelights:cut_cucumber",
"culturaldelights:eggplant",
"culturaldelights:cut_eggplant",
"culturaldelights:corn_cob"