Which in my opinion, if you have a severe infestation, would be nearly impossible. Identifying Scale Plant Insect. Use a cotton swab and coat them thoroughly. If the plant is watered with rubbing alcohol, the effects are similiar to those of ethanol. Without their covering, the insects soon die from fluid loss.
Depending on how bad the infestation is, repeat applications will be needed every three to seven days, for a couple of weeks. In order for rubbing alcohol to be effective, it must come in direct contact with the scale insects. Getting rid of scale on plants can be tough, but it’s not a death sentence for your houseplants! You can spray the solution on the pests as mentioned above or apply it directly with a cotton ball or swab. Scale insects thrive in warm, dry environments. At night or during overcast/ rain, you can kill all the bugs, very minor injury to the plants, and saponify the soil underneath (make more viscous/ hold water) but you gotta keep running that water for a while, rinse it super good (no answer for soil fungi and microbes, my plants usually like it better without things eating them, than not enough things helping them.) Not sure if rubbing alcohol would be better or worse for plants. This may require a bit of patience, but your plant will be thankful. Scale insects suck sap from plants, robbing them of essential nutrients. If you see a few scale pests, dab them with alcohol. Alcohol will dehydrate the pests and cause them to come off the plant.
In any case I think one would need to try this on a plant to plant basis, but yes it's very likely that you will get better effect against aphids. Scale generally targets the undersides of leaves and around leaf joints. The alcohol alone should kill the scale, but the dead insects will remain on your plants and make it difficult for you to scout for new infestations. It makes sense that the alcohol will dry out something, but I have had no problem with killing my plants while killing the insects. Yes, it can be very effective killing scale, mealybugs and other pests on your plants. A stronger concentration is more likely to kill insects; however, caution is needed when applying more concentrated alcohol. If you do this whenever you first notice them, and follow up with soap or … Follow these organic plant scale treatment methods, like using a rubbing alcohol-soaked cotton swab, neem oil for houseplants, and other natural home remedies, and learn how to prevent scale … What I have read is that you dip a Q-tip in rubbing alcohol and dot each and every pest. The small facial sponges, found in the cosmetic aisle, are abrasive, yet soft enough to use without scraping the plant stems. that is all.
The alcohol kills bugs by dissolving the bug’s cells as it is a solvent. But why does rubbing alcohol kill bugs and other plant pests? By acting as a spreader-sticker, the dish soap also helps the spray adhere to the plants evenly. At this concentration, it may safely be sprayed on plants to kill aphids. Does Rubbing Alcohol Hurt Plants When Used for Pests?. There are other means of eradication, that might be easier on your ferns, especially if it is just aphids. How It Works Separately and together, the alcohol and soap dissolve mealybug wax. Unfortunately, it can burn – or chill -- sensitive plant leaves. The scale bug is small, oval and flat, with a protective tan to brown shell-like covering (scale). One way to kill and remove as many of the scales from the plant as you can is by using a cotton swab dipped in rubbing alcohol (you may need to pry some of them off using your fingernail). Rubbing alcohol can be an effective pesticide for use against aphids, mealybugs, spider mites and whiteflies . Let’s learn more about identifying scale and how to control them. To get rid of scales on plant, dab a cotton swab in 70% isopropyl alcohol and apply to scale insects to kill them. Contact with alcohol also kills many other insects, including scales, spider mites and whiteflies. I have used it successfully to kill scale & mealy bug on plants with no detrimental effects on the plant. I personally wouldn't suggest using a spray of rubbing alcohol on your infected plants.
The alcohol solution helps to breakdown the bug’s protective waxy layer, causing them to dehydrate and die.