In 2000 I did an honours degree in chemistry working on roses in pots, and because of what I was doing with them (over watering and over fertilising them) aphids were a huge problem. I wasn't about to use chemicals on these things when I spent 10 months in a greenhouse with them (I'm sensitive to chemicals as it is, and was especially then, and didn't want to make it worse!) so I used a good natural approach to aphid control.
Nightshade spray (so - tomatoes, eggplants, potatoes etc)
These fabulous plants have alkaloids in their leaves and you can extract them in a solvent (like water) quite easily. As it's the plant's natural defence, it tends to ward off the bad bugs and not affect the good ones.
This spray keeps for about a month before the effectiveness wears off, if you keep it in the fridge.
- 1-2 cups nightshade leaves (loosely packed), chopped up
- 1-2 cups boiled and cooled water
- Spray bottle
- Extra boiled and cooled water
Some people are allergic to nightshades (my sister for eg!) so be careful about labelling this!!