seeing how tobacco plants are a member of the Night Shade family.you would plant companion plants the same as you would for Tomatoes,are peppers.
I plan to plant sacrificial "trap" plants for my garden. These are plants that aren't designed to deter the insects. Rather, their intention is to be more appealing than your crop so the insects will attack them first and foremost.
This planting will be a bed of it's own that consists of three layers. The three layers will be of plants ranging from shortest to tallest (shortest facing South).
The first layer is designed to attract aphids, I plan to implement a beautiful plant called Nasturtium at this level. It's low growing with a bushy tendency. The particular variety I have (empress of India) bears red blossoms. The entire plant is edible and very tasty.
The second row is intended to target horn worms, I plan to sow dill seeds in this row. It grows much taller and is allegedly very attractive and beneficial as a trap crop for the caterpillars. It's also very tasty for humans.
The third and final (tallest) row will be pollinator forage flowers. The reason for this is several-fold.
I feel that flowers are underutilized in the garden for several reasons. First, they attract beneficial pollinators (obviously). Secondly, they attract beneficial predators. I am hopeful that they'll attract hornworm predatory braconid wasps (which
might forage in close proximity to the dill--presenting an easy opportunity to lay eggs on the caterpillars)
Additionally, the scary ass hummingbird moths that lay hornworm eggs forage on flower nectar the same as other pollinators. Therefore, if I give them a nice dill plant next to some flowers--it's prime real estate for egg layment as well (so they think)
Finally, flowers are nice to look at and make me happy. The flowers I will be planting is Purpletop Vervain--a highly attractive forage flower.
I don't know if this will work all that well, but it is worth a try. I encourage myself to do it.
Don't be discouraged about companion plantings... It is a very valid (and great) question that's relative to what we are doing here.
I like where your head's at--keep asking questions and thinking like
you do.