Here is what we are doing currently to battle the beast - spraying with Kaolin clay to provide a physical barrier to the bugs. Surround is the registered trademark for Kaolin clay that is sold as a wettable powder. Kaolin clay is allowed by the National Organic Standards Board (NOSB). Mix about 3/4 cup of the powder in 1 liter of water, shake, and spray the foliage and fruit to cover.
It will need to be reapplied after a strong rain. The white residue can be washed off the fruit with water before eating.
Here is the foliage and tomatoes without the application of Surround. It is in the row immediately next to the row with Surround.
While this may not be the ultimate solution, it is reducing the population of stink bugs and their damage on the tomatoes for now.
Surround can also be sprayed on other vegetable crops to deter a variety of pests organically. Keep in mind to avoid spraying the flowers of insect pollinated plants such as squash.
We are also testing a stink bug trap that has a pheromone attractant. While it is certainly trapping a good number of stink bugs, it does not seem to be diminishing the number of pests or their damage on the plants. Is it attracting more stink bugs to the garden than would otherwise be there?