Aphids on Lettuce: The 5 BEST Ways to Get Rid of (& Prevent!) Them

chenell
By: Chenell - Lead Writer and Gardening Advocate
Published:

Finding little green bugs on your lettuce? Welcome to the world of aphids. Once you see one, you see tons of them multiply FAST!

Unfortunately, lettuce plants are a common target for aphids. These sap-sucking insects can cause serious damage to the plant, and often lead to reduced yields or even loss of the crop.

Let’s catch aphids before they cause tons of damage, and put in aphid control methods so we have healthy leafy vegetables growing this season.

What are Aphids?

Aphids are small insects that feed on the sap of plants. They can be found on a wide variety of different plants, including peppers, basil, and other herbs and leafy vegetables.

If you find them in your garden, its best to get rid of them as quickly as you can because they multiply like crazy.

There are thousands of species of aphids, with over 200 of those that feed on garden plants.

The aphid species commonly found on lettuce plants are the green peach aphids, foxglove aphid, and lettuce aphid, and potato aphids.

Potato AphidGreen Peach Aphid
potato aphid on branchgreen peach aphids
ColoringPink, green pink & green, or light green with dark stripePale yellow or green
ShapePear-shapedPear-shaped

Aphid Infestation & Damage

Aphids are not something you want to find on your plants because of two reasons:

  1. They can transmit different plant diseases, carrying it from one plant to another.
  2. They feed on the sap in leaves, which can stress out the plants enough to stunt growth.

Aphids feed on plant sap so causing stunted growth, wilting foliage, leaf curling and yellowing of the leaves.

They can also transmit plant viruses like lettuce mosaic and cucumber mosaic virus.

aphids on tomato plants

How to Get Rid of Aphids on Lettuce Plants

Alright, let’s talk about how we can get rid of and start controlling aphids in the garden.

1. Hand Removal

This is the most straightforward method if you catch an aphid infestation early.

If you only see a few aphids here and there, it’s best to just squash or remove them yourself. Since aphids reproduce really fast, if you take the time to go to the store, get some remedies and come back the next day, the colony might have doubled.

Aphids won’t bite you, so you can just squash them between your fingertips right on the leaves.

best watering wands

2. Spraying Aphids Off Your Plants

As the infestation gets to be more severe, you’re going to want to take more extreme measures. Luckily, you can spray them off the plant with a strong stream of water from a hose or watering wand.

If the plant is young and has delicate lettuce leaves that won’t be able to handle a strong spray, you can dip the entire leaf into a jar of room temperature water to remove the aphids.

3. Natural Sprays

Natural sprays can help kill aphids and reduce the reoccurrence of aphid infestations for a little while.

Neem oil is one of my favorite “garden tools because it works quite well on many insects, aphids being one of them. It’s organic and deemed safe for vegetables and other plants you intend to consume.

Neem oil removes the ability for aphids to be able to feed, helping to stop the damage, and kill them off.

Organic Neem Bliss - 100% Pure Neem Oil
$29.99 ($0.94 / Fl Oz)

100% cold-pressed neem oil that can be used as a foliar spray for healthy garden plants. Free of water and other additives.

11/26/2022 02:59 am GMT

4. Insecticidal Soap

You can purchase insecticidal soaps like this one that will help with getting rid of aphid colonies.

You can also make your own DIY soap with a few ingredients:

  • Dish soap (natural, free of perfumes)
  • Water
  • Vegetable oil
  • Spray bottle

Make sure you’re using a dish soap that doesn’t contain a lot of additives – we are spraying this on your plants that you’ll eventually eat and those additives can also impact plant growth.

Add 1 teaspoon of soap and 1 teaspoon of oil, to a half gallon of water and spray on the plants. Since aphids are most often found on the bottom side of the lettuce leaves, start by spraying there.

The soapy water will suffocate the aphids and they will eventually fall off the plant.

5. Introduce Natural Predators & Beneficial Insects

You can also attract the bugs and predators that feed on aphids as well. This is obviously a natural method and can be quite effective.

Natural predators to aphids include:

  • Lady bugs/lady beetles
  • Damsel bugs
  • Small parasitic wasps
  • Syrphid fly larvae

Ladybugs eat aphids in their natural environment, and you can either buy huge colonies of these insects (yes, you can get them on Amazon!), or plant flowering plants that attract them to the area – see companion planting below.

Prevention of Aphids

There are some ways to prevent aphids from making it to your leaf lettuce in the first place. Of course, if you’re already dealing with an infestation, you’ll want to go with some of the methods above.

Companion Planting Lettuce

Companion planting is the practice of growing two or more plants together in order to help one another.

There are many benefits to companion planting, including reduced need for pesticides and increased yields from your garden. Some plants can help protect other crops from fungal diseases or produce chemicals that repel garden pests or attract beneficial predators and parasites.

Some great lettuce companion plants are:

  • Beets
  • Asparagus
  • Carrots
  • Onions
  • Dill
  • Spinach & Arugula
  • Marigolds (attract ladybugs!)

These companions can help improve the health and growth of lettuce plants, by repelling aphids and other pests, providing nutrients through their root systems, and helping to prevent fungal diseases.

Attract a Lot of Lady Bugs

lady beetles aphids

Making your garden a nice home for lady bugs is a great way to prevent large aphid colonization.

Lady bugs are attracted to quite a few plants in the garden, including:

  • Dandelion
  • Cilantro
  • Dill
  • Parsley
  • Tansy
  • Marigolds
  • Chives
  • Calendula
  • Fennel

Having lady bugs around is a great way to ward off pests and wingless aphids – no wonder seeing ladybugs around is considered so lucky!

Row Covers

Row covers can come in handy when trying to control aphids if you typically get large infestations in the growing season. This isn’t a perfect method but can help repel aphids by making it extremely hard for them to reach your plants.

Row covers can also be used to protect from as shade cloth to protect plants from the heat and cold.

Inspect Plants Regularly

I like to check my plants every few days for signs of aphids. Sure, this can be something you do every morning when watering, but I always end up growing too many plants, so I just accept the risk I’m taking.

Inspect Store Bought Lettuce Too!

While it’s a little more rare than finding them in the garden, aphids can aboslutely be on the lettuce you buy from the store. Make sure you’re checking the underside of leaves, and if you find aphids on there, you should be able to spray them off with the faucet, or jsut rinse your lettuce well.

lettuce in a pot

Aphids on Lettuce Plants

Finding little green bugs on lettuce? You might have lettuce aphids. They leave a sticky substance behind and brown spots on the leaves as well.

You can use organic pesticides, foliar spray, or plain old elbow grease to remove infected leaves from your lettuce so you have no more aphids.

Do you have any other methods you’ve used to keep them from taking over your plants? Let me know in the comments!

chenell

AUTHOR, CHIEF GUACAMOLE CONNOISSEUR

Hi - I'm Chenell! I lived in the city for almost a decade, but after moving to the suburbs in 2020, I decided the logical millennial thing to do was to learn how to grow my own avocado toast. That's what this site is all about. 🥑

You can get access to all of my free resources and get some epic dad jokes (and helpful gardening stuff) emailed to you each week by signing up here.

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.