What natural or organic insect repellants are available?

Ants and Cockroach Spray
1 crushed clove of garlic, 1 tablespoon of cayenne pepper, 1 quart of water. Steep for 1 hour and then add: 1 tablespoon of liquid soap. Then take the mixture and spray it around the house

Chamomile Spray
Cover a handful of flowers with boiling water, or use a teabag according to instructions on the packet. spray when cool.

Chive Spray
A spray can be made out of the tea and can be used for apple scab or powdery mildew. cover chopped chives with boiling water: just enough to cover them. Infuse for 15 minutes and use undiluted.

Elder Spray
This works for mildews, black spot and a range of fungi. It is also poisonous. Boil 500g elder leaves in a liter of water for an hour with lid on the pan. Top up with water as necessary. Strain and spray. This can be kept in a sealed bottle in a dark place for up to three months.

Garlic Spray
Garlic spray is an effective fungicide. Unfortunately it also kills insects and should be used with discretion. It is very effective against brown rot and can be sprayed on fruit after it has been picked. Prepare same as Ants and Cockroach Spray, but leave the cayenne pepper out.

Horsetail Spray
This is a mildly preventive for mildew. Spray fortnightly. Boil 20g of horsetail leaves with one liter of water for half an hour. Strain and spry. Use at the rate of 1 liter to cover an area of q0 meters by 10 meters for the first spray, then dilute with 50 percent more water for subsequent sprays.

Horsetail Spray 2
Use 40 grams of the fresh herb, or half of the dried herb, 4 liters of water and boil for 20 minutes. Add a little pure soap as a spreader, cool and strain. You can add 11/2 cup of pyrethrum daisy for Insect Pests.
Equisetum's rich content of silica, calcium and cobalt and other minerals can make an effective fungicide for black spot, mildew, dampening off diseases, wilt, scale, anthaenose and other fungal diseases, on garden plants. Use the Equisetum tea fortnightly to aid the health of trees, ornamentals, vegetables and herbs. The spray is not a cure but, a preventative.

Horseradish Spray
Chop horseradish leaves, cover with boiling water, leave till cool and spray undiluted for any fungal problems

Milk Spray
Milk is effective against a range of mildews. Spray equal parts of milk and water every few days till the condition is cleared.

Mustard Seed Powder
Grind mustard seeds to a fine powder. Dust over plants affected by powdery mildew.

Nettle Spray
The Spray can be used against powdery mildew. It is also effective against aphids. Take a container of nettles, cover with water and leave for three weeks or till the water is mid-brown. Spray undiluted.

Pyrethrum Spray
Pyrethrum spray or dust may be made from pulverized pyrethrum (Tanacetum cinerarifolium) flowers or from feverfew (Tanacetum parthenium) flowers, often incorrectly called pyrethrum. They have a similar effect, but the true pyrethrum is more effective.

1 tablespoon pyrethrum powder or 2 tablespoons flowers or 4 tablespoons feverfew flowers

Cover flowers with alcohol (like brandy or sherry) or mineral oil overnight, then cover with 1 liter of hot water for an hour. Soapy water is best but not necessary. It helps the spray stick on the plant. Strain and use. Never boil pyrethrum, the fumes are toxic.

Repel flies, to
Grow pots of fennel, mint, tansy, wormwood, rue, basil or any of the Pyrethrum family and place near doors, windows or inside, for the summer, to repel flies and other insect pests.

Rue
Grow Rue around the house to repel flies, stable flies and mosquitoes. This is an excellent insect repellent.

Rhubarb Spray
Rhubarb leaves are poisonous. It is also harmless to bees and breaks down quickly. Boil 1kg rhubarb leaves in 3 liters of water for half an hour. Add enough soap to color and dilute with equal proportions of water before spraying. Keep out of the reach of children and label Poison.

Seaweed Spray
Wash salt from seaweed, cover with water for three weeks. Strain off as much water as you need, dilute till it is the color of weak tea and spray. This will strengthen a plant's resistance to a range of infections. It is also a mild fungicide and repeated use should cut down brown rot, curly leaf and other such problems. It can be used at any time of the year, but spray at night in hot weather.

Sugar Spray
Dissolve 2 kg sugar in a bucket of water. Drench the soil to kill nematodes. Molasses can also be used but don't use honey as it may transmit disease to bees.

Tansy Spray
Tansy inhibits feeding. Cover 1 cup chopped tansy with 2 cups hot water. Cool, strain, spray. Good fly and insect repellent.

Wormwood Spray
Wormwood kills and repels fleas and other pests like flies, months and mosquitoes. Cover leaves with boiling water and leave for three hours. Dilute with four parts water.