Whiteflies

Whiteflies are small, sap-sucking insects that are common pests affecting a wide variety of plants, including cannabis.

Also called / Category:

Also known as Aleyrodidae; Pests, Pathogens & Disorders.

Key takeaways:

• Whiteflies are tiny, winged insects that feed on plant sap.
• They can cause yellowing and wilting of leaves.
• These pests are often found on the underside of leaves.
• Whiteflies can spread plant diseases as they feed.
• Controlling whiteflies involves manual removal and natural predators.

What it is / How it shows up:

Whiteflies are often mentioned in gardening forums, plant care guides, and pest control resources. They are small insects that resemble tiny moths and are typically found on the underside of leaves. Cannabis growers may notice these pests when leaves start yellowing or wilting due to sap extraction. They thrive in warm environments and are particularly fond of greenhouse conditions. Aside from direct damage to the plants, whiteflies can also excrete a sticky substance known as honeydew, which attracts sooty mould, further damaging the plant.

How it’s measured or identified:

• Visual inspection of leaves, especially the undersides.
• Monitoring for yellowing or wilting of leaves.
• Checking for honeydew and sooty mould presence.

Use in context:

• "I noticed whiteflies on my cannabis plants causing leaf yellowing."
• "To manage whiteflies, introduce natural predators like ladybugs."
• "Regularly inspect your plants to prevent whitefly infestations."

Safety & compliance in Canada:

• Use approved pest control measures that comply with Canadian regulations.
• Avoid using harmful chemicals that could affect product safety.
• Regular monitoring and early intervention can prevent large infestations.

Related terms / See also:

• Aphids
• Beneficial microbes
• Aeroponics
• Auto-flower
• Apical meristem

FAQs:

What are the signs of a whitefly infestation?

Signs include yellowing or wilting leaves, a presence of sticky honeydew on leaves, and sooty mould.

How can I control whiteflies on cannabis plants?

Control methods include manual removal, introducing natural predators like ladybugs, and ensuring proper air circulation.

Are whiteflies harmful to humans?

Whiteflies are not harmful to humans, but they can damage plants and reduce crop yields.

Sources:

• offset-4 transition-colors hover:underline" title="Learn more about Health Canada">Health Canada
• PubChem