Mike -
We participate in a monitoring program through DATCP and IPM Pathways; they do monitor trapping for new invasives at our place and several other orchards in the area. I don't have the answers to some of your questions but I could inquire.
Here are the numbers for the two traps on our property this past year (one each in our two biggest blocks):
Trap set 05/15/20, Trap down 09/15/20: 726 BSB
Trap set 05/15/20, Trap down 09/15/20: 320 BSB
They were pheromone-baited traps. The insects were identified by DATCP entomologist at the Plant Industry Lab in Madison. Any suspects were sent to a USDA identifier for official confirmation. They did not give me a breakdown on how many times they checked the traps during the period the traps were up, but they did mention that most were collected in the two weeks from June 1-15. They also mentioned that there appears to be a second emergence in August.
I have not ever noticed BSM myself on our trees, but I have not been actively scouting for them. This goes for confirmed damage from them as well. And so I have not actively tried to treat for them.
Based on this new information I had planned to start specifically looking for them this year, especially on our dwarf trees. We are a small (about 9 acres currently planted), well established, very diverse orchard - our trees range greatly in age, rootstock, variety, density, system etc.
Age: oldest trees planted in the 1970s, bulk of trees planted between 1986 and 1995, continued various planting from 1995 through 2020.
Rootstocks: seedling, MM111, B118, MM106, M7, Mark, M26, B9, G30, G11, G16, G41, G935, G890, G202
Varieties: about 90 - there is a list on our
website if you feel that would be helpful.
Door Creek Orchard
Zone 5a in Wisconsin