Aphids, Spider Mites and 7 Other Bugs That Are Killing Your Plants (& What to Do About ‘Em) - PureWow
It's such a joy to see your houseplants, vegetable garden, flowers—or whatever greenery you have, no matter how small—thrive and bloom. But occasionally, you discover a nasty little surprise: What the heck is that weird bug? And what is it doing to my plant? Before you panic, take stock of what's going on. Sometimes you see the damage first, sometimes the bug. To accurately ID the problem, look for other clues such as webs, sticky sap-like substances and holes in the leaves. For houseplants, it's also smart to isolate the affected plant from others before they all get infected.
Of course, outdoors, you'll encounter bugs on your plants regularly. But the most common way a houseplant gets infected is when you bring a new plant home from the nursery, or if you let them spend the summer outdoors. Either way, inspect the plant before bringing it into your home, give it a once-over with an insecticidal soap before taking it indoors for the winter, and keep it away from your other plants for a few weeks once it's inside.
Finally, be real about your plant's health. Sometimes you try everything and a plant still is a little sad-looking. If you've made several attempts to get rid of the bugs and haven't succeeded, give yourself permission to toss it! Sometimes you have to exercise a little tough love to protect your other plants.
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Here are the most common bugs that affect both indoor and outdoor plants:
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What to do: Knock down the aphids with a spray from your hose. Indoors, put the plant in the sink and use the sink sprayer to wash it clean. You'll probably have to do this a few times on a regular basis. Or use a cotton swab dipped in alcohol to rub away individual insects. Your last resort is to spray with insecticidal soap or neem oil.
Treat it with: Insecticidal soap, $10
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What to do: We're not going to lie—these are some extremely difficult pests to control. You can spray the plant off with water, as above, or use an insecticidal soap. But you'll need to repeat in about a week. For bad infestations, you may be better off tossing the plant.
Treat it with: Insecticidal soap, $10
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What to do: Spray the plant with insecticidal soap, especially under leaf surfaces. Repeat in a few days, but sometimes, your only option is to dispose of the plant.
Treat it with: Insecticidal soap, $10
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What to do: Use a nail file or toothpick to pick off early infestations. Or spray with neem oil to smother the adults, which are somewhat protected by the waxy coating. Insecticidal soap will kill the immature forms.
Treat it with: Neem oil, $11
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What to do: Clean off individual insects with a cotton swab dipping in rubbing alcohol, or use an insecticidal soap. Bad infestations usually mean it's time to say buh-bye to the plant.
Treat it with: Rubbing alcohol, $2
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What to do: Check your plants daily, because they show up overnight. Use row covers to keep beetles off your plants, or a pyrethrin-based insecticide labeled for vegetables.
Treat it with: Insecticidal Spray, $15
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What to do: Row covers can protect young plants. If it's a bad infestation, look for pyrethrin-based insecticides that are safe for the vegetable you're growing.
Treat it with: Pyrethrin insecticide, $15
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What to do: Sprinkle a little organic slug bait around plants a once or twice a week in spring and keep fallen leaves cleaned up so they have no place to hide.
Treat it with: Slug bait, $11
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What to do: The larvae feed on organic material such as peat moss, so use a product containing Bacillus thuringiensis var Israelensis (BTi) on top of soil. This naturally occurring bacteria attacks the larvae's digestive system and stops the reproductive cycle. You can use yellow sticky traps, but that doesn't halt the source of the infestation.
Treat it with: BTi, $41
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