Homemade
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You can make this solution for rose-pests yourself at home with very few ingredients, rhubarb being the main one of course.
Juices from the leaves of your plants are sucked out by aphids and they must be controlled early on.
Homemade Aphid Spray Recipe Using Rhubarb Leaves
Save 5 or 6 rhubarb leaves from the compost heap. Remember the oxalic acid? Put on your gloves!
Chop them up finely and add to 1 quart of water. Let this boil down for approximately 30 minutes.
Add a squirt of non detergent soap to this liquid. You can use regular dishwashing soap.
Strain the liquid of leaves. Putting it though a sieve would be a good idea. Once you have strained your mixture, simply add it to a spray bottle.
Rhubarb leaves are poisonous, so do not use this spray on or near your edible vegetable plants in your garden.
Providing More Care For Your Roses
If you would rather not use rhubarb, try this:
Mix 1 cup of vegetable oil with 1 tblsp. of liquid dish detergent. Shake it up well.
Take 1 tblsp. of this liquid and add it to a few cups of water in a spray bottle. Shake well. Spray once per week on your plants.
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