Prohibition against Eating and Benefitting from Orlah: Pesachim 22b, 24b-25a, 25b; Kiddushin 38a
Produce which might be Orlah, in Israel, Surya, or outside of these areas altogether: Kiddushin 38b-39a
The first of Tishrei is the demarcation of a new year for counting in the prohibition against using the First 3 Years of a tree's Produce: Rosh HaShanah 2a, 9b
Orlah on Publicly-Owned Trees: Pesachim 22b-23a
Considering Smearing Orlah Olives on the Skin of a feverish person to be an abnormal Benefit: Pesachim 25b