Fungus gnats are a common pest of houseplants, but a squirt or two of rubbing alcohol probably won’t have much effect on the tiny, black insects. … The gnats are attracted by the color and stick to the card when they come close to investigate.
Can you use 99% isopropyl alcohol on plants?
Rubbing alcohol can be an effective pesticide for use against some insects such as aphids and mealybugs. A few plants may be slightly sensitive to rubbing alcohol; however, Cool Plant Blog points out that as long as you properly dilute the alcohol solution, you shouldn’t have any problems.
Does rubbing alcohol and water kill gnats?
Homemade gnat killer spray: A mixture of half a cup of water, half a cup of isopropyl alcohol, and a teaspoon of dish liquid can be filled in a spray bottle. This mixture can be sprayed on the gnats directly to kill them.
Will isopropyl alcohol kill plants?
Seventy percent isopropyl alcohol is sold for antiseptic use. At this concentration, it may safely be sprayed on plants to kill aphids. … At 5 percent concentration, plant growth is stunted, while concentrations higher than 25 percent tend to damage or kill the plant.
What kills fungus gnats instantly?
Mix one part peroxide with four parts water, and pour it through the soil at the root zone until it begins to come out of the base of the pot. The peroxide kills fungus gnat larvae on contact. Neem oil is also an effective soil drench to combat fungus gnat larvae.
Does dish soap kill scale?
Young scale insects can usually be controlled with a spray of soapy water. Use mild dishwashing liquid that doesn’t contain fragrance or other additives. … Rubbing alcohol kills many house plant insects, including scale. Dab them with a cotton swab soaked in rubbing alcohol.
Will coffee grounds get rid of fungus gnats?
Unfortunately, coffee grounds often end up in the trash even though they can be used in various ways even after you have enjoyed your hot beverage. They can, for example, help to get rid of gnats in houseplants or in the garden.
Is isopropyl alcohol safe for succulents?
The most common succulent pests are aphids and mealybugs. They can be controlled by rinsing the affected areas with water, using neem oil, insecticidal soaps or a squirt bottle filled with rubbing alcohol. A fine, light spray of rubbing alcohol does no damage to succulent leaves and kills the bugs instantly.
Does rubbing alcohol kill scale?
A sure but tedious method for killing scale insects is to dab them with a cotton swab dipped in rubbing alcohol. This method is 100% effective, as long as you are diligent. Hot water is another way to kill these pests. … You can also evict scale insects with a stream of water.