Roses and their enemies & Friends
Roses are often attacked by fungus or a kind of mildew and you can try dusting wettable sulphur on them says Louise Riotte in her book Carrots Love Tomatoes.
Try this garlic recipe to fight the worst insect pests in your garden she says. Take four ounces of chopped garlic bulbs and soak in 2 tablespoons of mineral oil for one day. Add a pint of water in which one teaspoon of fish emulsion has been dissolved. Stir well.
Strain the liquid and store in a glass or china container, as it reacts with metals. Dilute this, starting with one part to 20 parts of water and spray it against any insect pest bothering your plants. It works on rabbits as well as they dislike the smell of fish. Garlic sprays also work well to control late blight on tomatoes and potatoes she says.
Geraniums are good to plant among roses, grapes, and corn to fight the Japanese beetles.
The horsetail (Equisetum arvense L.) the field horsetail is a healing herb and if made into a spray controls mildew on roses!