What kills whiteflies is a common question of all growers.  Whiteflies are tiny—about 1 1/16 inch long, but if left untreated, plant leaves will turn pale or yellow and wilt or fall off. Whiteflies on plants can also transmit harmful viruses, which in extreme cases, kill plants.

Despite the name, whiteflies are not flies but are related to aphids and cause similar damage. Both bugs extract plant sap with piercing-sucking mouthparts, causing foliage damage and stunting growth. Whiteflies also secrete a sticky substance known as honeydew, promoting fungal diseases such as black sooty mold.

Whiteflies repopulate quickly. Most insecticides leave an oily residue that must remain on the leaf for days and weeks in order to control the whitefly population. Unfortunately, this biofilm residue doesn’t just kill insects, but it kills the plant, blocking the sun, nutrients and CO2.

Protection Plus, a water-based insecticide and whitefly spray kills 100% of whiteflies on the first application (as shown in efficacy lab tests).

There are hundreds of different whitefly species, some of which spend their entire life cycle indoors, like the common greenhouse whitefly. Outdoors, whiteflies begin reproducing in late spring, and within ten days, the eggs hatch into nymphs before becoming winged, egg-laying adults. Their complete lifecycle lasts between 1 and 2 months, and several generations can overlap. The longer you wait to kill them, the more challenging it will become.

One way to tell if you have a whitefly infestation is to look for ants, which are attracted to the secreted honeydew smell. Another way to know if you have whiteflies on plants is to watch for tiny bugs flying off the leaves when you approach.

It’s time to get rid of your whiteflies. No more frustrations. No more infestations. If you want to know what kills whiteflies, look no further than Protection Plus.

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Protection Plus -
Kills Whiteflies on Contact

  • Earth-friendly: natural, food-based ingredients
  • Lower cost: Eliminates excessive treatments and the need for product rotation
  • Guaranteed pure: Quarterly testing to be free of over 400 forbidden ingredients to ensure our products are safe and natural for tough hemp and cannabis testing requirements
  • Free of all Proposition 65 ingredients
  • Residue-free, non-oil based formula doesn’t clog pores or hamper plant growth
  • Industry high kill rates

Protection Plus Whitefly Spray Protocol

There are six stages of growth on the leaf, one of the stages is flight. The eggs are oblong and whitish in color and the nymphs are translucent and may take on the color of the plant leaf as light bounces back through it. Flying insects are always a challenge however, Protection Plus is a great knockdown pesticide. Spraying over the canopy will promote flight and this is a good time to make sure enough pesticide travels into the air to make contact will all of the fliers. Because the fliers may get only a partial application, we are suggesting the maximum dosage

Before applying any pesticide, make sure the plants are fully hydrated. Flush the plants well with water and show a good amount of run-off. Wait 1 hour before application. Professional Pesticide Applicators Note: Many infestations come from stress caused by excess fertilizer in the growing medium. Check EC/PPM of the last few ounces of run-off from the pot. It must be the same EC/PPM as the water you used to flush with. Repeat the flush procedure until you get matching numbers, then treat for insects.

  1. We recommend you spray the surface of the soil to penetrate ½ inch down to where the insects may be crawling. Treat all plants in the greenhouse or home.
  2. Spray the leaves and stems for crawlers and breeders, making sure that every square inch of the plant has been treated. Treat all plants.
  3. Hang sticky fly traps (blue and yellow) throughout the growing area, including areas of the greenhouse or home that has grown plants or exposed soil. These traps will help you keep an eye on the situation.
  4. Infestation application or to gain quick control of the crop. Spray three times on day one, and wait for the spray to dry between applications. Then, spray once a day for the next three days, then spray once every three days until you observe a pest-free crop. Note: Since you chose the infestation application method to gain quick control of your crop, you now know you are prone to extreme pest attacks from incoming plants, guests, workers, or a source unknown. If you have pest issues you also have plant quality and harvest quantity issues. In the end, the company that supplies the market with the most consistent produce wins. Just like buying fertilizer, weekly pest treatments are part of the cost of doing business. Alternate application for this pest: Apply Protection Plus once a day for three days and then go to spraying once every three days until the infestation is under control.
  5. Spray the plants every 7 days throughout the plant’s life as part of your IPM (Integrated Pest Management program). This will assure you that there will be little chance of pest problems.
  6. Dosage should stay at 4 ounces (120 ml) per gallon of water. These insects are hard to control.
  7. Since they fly, they will go airborne when they feel the spray hitting the leaves of nearby plants. If the plants are in a vegetation state, then you might want to spray over the plants so when they do go airborne, you will hit them with the spray. If your plants are in bloom, you will have to determine the severity of the infestation. If the thrips are placing the blooming crop in danger of failure, then you will have to kill them. As we have addressed before, by just spraying water on delicate buds you will notice some cosmetic imperfections. Most plants in the early stages of bloom growth will out-grow any cosmetic imperfections.
  8. The Whitefly will die within seconds. They will eventually fall off of the leaf or simply brush them or wash them off.
  9. If possible, use an airless sprayer. They emit a very consistent fine spray without a lot of pressure behind it. This will allow the plant’s leaves to not move around so much that you miss hitting the pests. 100 ft super light-weight hoses and extra reach attachments are available. Use the orifice supplied for fine mist applications. Make sure the sprayer is rated for food crops.


The team at EPM is incredibly helpful and the product is fantastic. We noticed a difference in the plants just hours after application!

-Paul from Michigan