M.K. Dorje Jr. wrote: I would like to hear more about the seed weevil and if they actually help control the spread of this plant in the Northwest. (Also, does the broom weevil eat pea seeds?- I have a terrible problem with weevils in my pea seeds when I try saving them.) Anyone out there have experience with "Broom weevils" as a beneficial insect?
I recently began working in the office of my local noxious weeds board in Washington state. We just released another set of broom weevils today. They have been employing this tactic for at least five years. Technically it is expected that the weevils will do in the plant, however, this has not been the norm as of yet. While they are over-wintering well it is suspected we simply haven't reached a high enough ratio of weevils to plants. Apparently they have been effective in slowing, if not eliminating, the spread of scotch broom. A step in the right direction for these parts. The weevil babies eat the seeds and I was told they are specific to brooms and only brooms.
Helped a friend clear their ditches of these last year. Made the mistake of burning them. They went up as fast and hot as tumbleweeds.Thank goodness it wasn't a huge pile!
Hope that helps. If you have specific questions, I can make it a point to get them answered for you. I'll pick the bosses brain about the peas this weekend.