Keep the field weed-free for the first 60 days, the critical period. Do the first hoeing on day 45 without disturbing the stolons, and the second hoeing with earthing up on day 60. Earthing up also covers tubers so tuber moths cannot lay eggs on them.
Pending expert review
Source
Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Potato – After cultivation, p. 135
