well, 1 month latter, and the aphid plague has been contained, but not erradicated.
I've resisted the soap\water mix sice the attacked weeds are planted in the enclosure.
Today, I found this 2 solutions online (quoted from
this site):
Tomatoe Leaf Spray:
Nightshade family plants, such as tomatoes, potatoes and tobacco, have toxic compounds called alkaloids in their leaves. These toxins are water soluble and can be soaked from chopped leaves and made into home-made sprays. These sprays also work by attracting natural pest enemies. The good bugs follow the smell of the spray in looking for prey.
Protection Offered: Tomatoe leaf sprays have been used to protect plants from aphids. Also, spraying tomatoe leaf spray on corn may reduce corn earworm damage. The corn earworm is also called the tomatoe fruitworm, as it also attacks tomatoe plants. A scientific study has shown that corn plants sprayed with tomatoe leaf spray attracted significantly more Trichogramma wasps to parasitize the corn earworm eggs than the unsprayed did.
How to Make: Soak 1 to 2 cups of chopped or mashed tomatoe leaves in 2 cups of water overnight. Strain through cheescloth or fine mesh, add about 2 more cups of water to the strained liquid, and spray. For aphid control, be sure to thoroughly cover the leaf undersides, especially of lower leaves and growing tips of plants where aphids congregate.
How to Use: Spray plants thoroughly, particularly undersides of lower leaves and growing tips where aphids congregate. while this spray is not poisonous to humans on contact, use care in handling, especially if you are allergic to the nightshade family.
Garlic Oil Sprays:
Organic gardeners have long been familiar with the repellent or toxic affect of garlic oil on pests. when it is combined with mineral oil and pure soap,as it is in the recipe that follows, devised at the Henry Doubleday Research Association in England, it becomes an effective insecticide. Some studies also suggest that a garlic oil spray has fungicidal properties.
Protection Offered: Good results, with quick kill, have been noted against aphids, cabbage loopers, earwigs, June bugs, leafhoppers, sqaush bugs and whiteflies. The spray does not appear to harm adult lady beetles, and some gardeners have found that is does'nt work against the Colorado potaoe beetles, grape leaf skeletonizers, grasshoppers, red ants, or sowbugs.
How to Make: Soak 3 ounces of finely minced garlic cloves in 2 teaspoons of mineral oil for at least 24 hours. Slowly add 1 pint of water that has 1/4 ounce liquid soap or commercial insecticide soap mixed into it. Stir thoroughly and strain into a glass jar for storage. use at a rate of 1 to 2 Tablespoons of mixture to a pint of water. If this is effective, try a more dilute solution in order to use as little as possible.
How to Use: Spray plants carefully to ensure thorough coverage. To check for possible leaf damage to sensitive ornamentals from the oil and soap in the spray, do a test spray on a few leaces or plants first. If no leaf damage occurs in 2 or 3 days, go ahead and spray more.
I figure they might be safe, right?