I've been following all the root aphid threads and I am so glad to see that the natural remedies are working. The excessive and ineffective pesticide use was making me very sad. I still worry about the creation of a Met52 resistant root aphid.
A couple of things from the threads that aren't getting enough attention IMO.
How can castings or organics help to solve or prevent a root aphid problem? A couple of possible explanations
- There is some some sort of bacteria in castings and live soil that attacks or deters root aphids. In particular, castings contain a lot of chitinase producing bacteria. Chitinase is an enzyme that breaks down chitin. Many bugs have exoskeletons that are made of chitin and may be destroyed or deterred by chitinase. As an aside you can increase the population of chitinase producing bacteria in your soil or coco mix by adding crustacean meal.
- Castings and live soil contain nematodes that attack root aphids.
- The fungus present in castings and living soil may help protect roots from aphid damage
Pine
A couple of things from the threads that aren't getting enough attention IMO.
At the risk of sounding like a castings fan boy, i found that a mixture heavy in worm castings along with worm teas and azamax spray /drenches got beans off to a good start. Even with fliers still lurking, they grew as normal.
It was and has been my pure organic, soil-food-web locations that save my ass, every time. I can't explain it, but that is what I've observed. Just a 100' or so away from the perlite hempy tubs that were infected I had my regular raised bed, down by the veggie garden. Not a hiccup, not a thing infesting them, let alone stopping bud growth. It's been suggested to me that the Brix levels of the different grows play a role, could be any number of variables.
all these chemical cures just make your plants sick and weaker. Go back to organics. Worm castings alone completely solved my root aphid issue.
How can castings or organics help to solve or prevent a root aphid problem? A couple of possible explanations
- There is some some sort of bacteria in castings and live soil that attacks or deters root aphids. In particular, castings contain a lot of chitinase producing bacteria. Chitinase is an enzyme that breaks down chitin. Many bugs have exoskeletons that are made of chitin and may be destroyed or deterred by chitinase. As an aside you can increase the population of chitinase producing bacteria in your soil or coco mix by adding crustacean meal.
- Castings and live soil contain nematodes that attack root aphids.
- The fungus present in castings and living soil may help protect roots from aphid damage
Pine