Hi, we have a big problem with white aphids in our garden, I'm going to try the rhubarb spray that I found on your site.
If you have any other sprays that might help I would appreciate it
1. Soak 75g chopped garlic bulbs in 2tsp mineral oil for 24 hours. Add 1 pint water mixed with 7g soft soap. Stir well and strain in non-metallic container and store. To use: dilute 1 part of mixture to 20 parts water.
2. Boil 10 cloves garlic, 4-5 very hot chillies, 2-3 onions for 5-10 mins. Stand overnight. Add liquid soap or milk. Store in glass bottle. To use: 1 small cup mixture to 7 litres water.
Grind dry flowers or extract with kerosene. Remains toxic for 12 hours. Non toxic to mammals, but this will kill bees, ladybirds and other beneficial predators. Spray in evening when bees etc, are less active.
50g common salt to 3.7 litres water.
Use soft soap (made with potassium carbonate and not caustic soda) Dissolve 50g in 4.5 litres hot water. Apply when cool.
For more info on Aphids, see
Aphids on orange trees A quick look
Ant or Aphid Indepth
Beneficial Insects Hoverflies loooove aphids...