That was a tale going around at the time,, but they found out that it was started by the vinyard owners who were losing business because the French people were drinking Absinthe more that the wine produced there. I hear it does have quite a kick though.
Personally i make sure my crops are rotated. ! have 4 beds, and rotate by group. then i just look at what works best in each group. For me Group 1 - toms, basil, garlic and onions Group 2 - Carrots, beets, peas Group 3 - corn, pumpkins Group 4 - Beans squash. If you find one group is getting a pest, then see what you need to add or remove with regards companion plants.