A nice high-res close-up clearly showing the culprit pests would be good. I agree with other earlier posters, that they may be whitefly or possibly cast-off aphid skins (exoskeletons). Neither are very good, and can be disastrous for the D. capensis plants.
Tucson, Arizona, U S A
Here is a good pic of aphids and their shed skin.
My goodness, they are absolutely SWARMing...
Unlike pitcher plants, dews usually react poorly to most pesticide treatments ime. Of the systemics, pesticides containing imidacloprid seem to have less nasty impact than others. Neem (as mentioned) is favored by many but I don't believe it is systemic.
For a truly benign approach, consider CO2 treatment w/ dry ice. I'm just finishing a treatment because I received aphids in a trade.
In addition, you probably want to get in the habit of closely inspecting your plants on a regular basis. You are fortunate that your plant is robust so it has withstood this attack very well. Other plants could be mostly dead by this stage. Also, other pests may be significantly less obvious than this.
Alright - looks like it's an aphid infestation then. Phwar! OK, I need to go find me some pesticides stat. I read on AllExperts that Ortho brand systemic insecticide is safe on sundews. That should be easy for me to find.
These little suckers are gonna burn!!!
Thanks for your replies, everyone.
After trying avariety of appraoches to aphids (CO2, drowning, Bayer Rose stuff....) I found that the Neem oil application worled the best. I haven't seen any sign of the pests since the repeated application.
- Ortho Systemic has been pulled from the market (I believe the active acephate has been banned)
- will typically cause a negative reaction when used on dews (killing some)
- has a horrendous odor & toxicity to people is not good (aka: not the ideal stuff for indoor use)