The Habitat
Home
Share to PinterestNeem Ayurvedic Oil with Mortar and Pestle
GardenGardening

Go Natural and Use Neem Oil on Pesky Plant Pests

By Sara Anderson
Share to PinterestNeem Ayurvedic Oil with Mortar and Pestle
Advertisement

Have you ever started watering or tending your plants only to find bugs on the undersides of leaves or spots that don't look quite right? It's alarming, and you instantly seek to restore balance. Increasingly, people are switching from synthetic chemicals to less harsh and dangerous organic fixes. Neem oil is an affordable and eco-friendly option to manage many pests and pathogens. Using it properly can be a boon to your garden and beloved house plants.

01

What is neem oil?

Share to PinterestNeem oil in bottle and Neem leaf in mortar and pestle
Ninetechno / Getty Images

In the Indian subcontinent, multipurpose neem, also known as Indian lilac, has been a trusted medicine for centuries. A natural health and beauty remedy, neem is a highly effective and biodegradable pesticide too. Its oil is derived from the seeds of neem trees native to South Asia and is triply useful as a miticide, fungicide, and insecticide.

Advertisement
02

How does neem oil work?

Share to PinterestMedicinal neem leaves with fruits
bumbumbo / Getty Images

The active ingredients in neem oil, such as azadirachtin, repel unwanted critters. When pests feed on treated plants and ingest the oil, its components mimic their hormones and affect their ability to mature and lay eggs. The consequences are lethal.

In addition, applying neem oil products directly to soft-bodied insects suffocates them.

Advertisement
03

Which pests and pathogens respond best to neem oil?

Share to PinterestJapanese beetles destroying leaves
WayneDouplains / Shutterstock

Neem oil is versatile. It can kill aphids, Japanese beetles, caterpillars, leafhoppers, mealybugs, thrips, and whiteflies, to name a few. It is also effective against fungal diseases like anthracnose, black spot, powdery mildew, and scab because it stops new spores from germinating. Squash bugs have hard bodies and are unaffected by neem oil.

Advertisement
04

Neem oil safety

Share to Pinterestperson scratching arm
RealPeopleGroup / Getty Images

You and your pets shouldn't have safety issues with diluted neem oil. Still, take care to follow instructions and limit exposure to prevent skin irritation. If you've applied neem oil to veggies, wash them before eating them.

Neem products don't pose a hazard to birds, mammals, and plants, but they are toxic to aquatic animals including fish. Beneficial bugs such as pollinators that don't consume the plant's leaves should be fine.

Advertisement
05

How do neem products differ?

Share to PinterestOrganic Neem (Azadirachta indica) cake
ziprashantzi / Getty Images

Formulas vary. Besides granules and powders, you get a range of 'ready to use' products conveniently packaged in spray bottles and containing various essential oils. And you can buy concentrates that require dilution and tend not to cost as much. Use neem oil neat, and you risk damaging your plants. You'll also find neem cakes on the market. These products act as a protective fertilizer, and plants end up with built-in defense mechanisms that can save commercial crops, for example, from infestations.

Advertisement
06

First steps

Share to Pinterestkeeping a check on plants using a mobile app
Luis Alvarez / Getty Images

Use a plant app or do online research to identify the problem at hand and figure out how to address it. Gather your materials and set aside time to make and apply your solution. You only have about eight hours before diluted neem oil begins to break down and changes consistency.

Advertisement
07

How to make a neem oil solution

Share to PinterestHand holding an amber spray bottle
Kira McDermid / Shutterstock

If your neem oil doesn't come with directions, use the following method to create your DIY solution.

For home use, you'll need the following:

  • 1 or 2 tablespoons of pure, cold-pressed neem oil
  • A couple of teaspoons of dish detergent
  • 1 gallon of warm water
  • A foliar spray bottle

Oil and water usually don't mix without help from an emulsifying agent like mild dish soap. First, mix the dish soap and lukewarm water with a vigorous bottle shake. Then remove the lid, add the oil in small increments and shake again.

Are you treating a lot of plants? Use a pump sprayer instead.

Advertisement
08

How to apply your mixture

Share to Pinterestspraying solution in plant
Tharakorn / Getty Images

Before you do anything else, test your solution on a small section of your plant. Wait a day, and if there's no damage, you can turn your attention to the other parts of the plant. In this context, neem only works as long as it's wet, so apply your solution liberally. Remember to spray underneath leaves and on stems and the soil too.

Sudden downpours will wash away the neem on your freshly treated outdoor plants, so be sure to reapply the solution when the skies clear. It will take at least a few days before you start seeing changes.

Advertisement
09

The best time to use neem oil

Share to PinterestKira McDermid
Zbynek Pospisil / Getty Images

You can use neem oil indoors or outdoors but be aware that plant leaves exposed to intense, direct sunlight can burn if your neem mixture is potent. For optimal results, apply neem to your outdoor plants in the evening and push treated indoor plants out of the way of bright sunlight. You can use neem oil at any point during the growing season because it is deadly at all stages of a pest's lifecycle. Apply every fortnight for preventive maintenance, and in the event of an infestation, spray your plant once a week.

Advertisement
10

The bottom line

Share to PinterestNeem oil in bottle green leaf and neem fruit on wooden bowl on table
nang nang / Shutterstock

Neem oil is handy if you're looking for a safe alternative to harsh chemical pesticides. It tackles a wide array of pests and pathogens, and it's inexpensive and easy to use no matter the season. Go ahead and stir up a proactive batch, and your plants may yet live to see another day.

Advertisement

Share

Scroll Down

for the Next Article

Advertisement
Advertisement