Whiteflies > Identify, Control & Disease Prevention Tips

Whiteflies

Whiteflies belong to homopterans, and these insects cause a lot of problems in warmer climates because they thrive in southern regions, hence can't overwinter. Citrus trees are especially inclined to get them. However, these pests are picky when it comes to finding a host. There are about a hundred species of them, and Silverleaf whitefly, Greenhouse whitefly, and Giant whitefly affect a wider range of plants than the others. Despite the name, whiteflies aren't flies; they are just soft-bodied insects with wings; when it comes to the color, they are indeed white. Since they are homopterans, they are related to mealybugs and aphids. Whiteflies live in clusters, and it's easier to spot them than the other nightly insects. It's very important to spot these insects during their larvae stage, when it's the easiest to get rid of them.

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Signs of damage

Honeydew. Similarly to aphids, whiteflies feed on plants' sap, so they pierce their mouths into the host. Hence honeydew, a sugary and sticky secretion, is produced. This sign is very important because it shows that these insects were around for a while. Mostly honeydew can be found underside the leaves and on the new growths.
General wilting. Even photosynthesis can't be carried out normally because, during a heavy infestation, the plant becomes extremely weak.
Reduced growth. Another important aspect is the consequences of general weakness.
Change of the leaves' color. Foliage becomes yellowish or just paler.
Falling of the leaves. After the color change, leaves eventually become weaker and then drop off.

How to prevent

Always check on the plant before buying them because signs of the disease can be visible. Once you get the plant, inspect it from time to time, so you will be able to spot disease at the early stage. Try to create conditions that can be attractive to natural predators like ladybugs, dragonflies, or hummingbirds; they will take care of the whitefly problem before you even notice it. Aluminum reflective mulch is a great solution for peppers and tomatoes; this preventive measure will make it harder for whiteflies to find their host.

Heal

You can begin treating by blasting the whiteflies with water; you can use a watering hose for this purpose. Insecticidal soap is very helpful in this case, and don't forget to apply it under the leaves. You can also use a handheld vacuum but be careful with it.

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