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August 22, 2025
Cannabis cultivation requires careful attention to every detail — and pest management is one of the most critical aspects of maintaining healthy plants and maximizing yields. Unfortunately, cannabis plants are vulnerable to a variety of pests that can quickly damage crops, reduce quality, and impact profitability. Knowing which pests pose the greatest threat and how to identify them early can make all the difference.
At Secured Environments Pest and Wildlife Services, we specialize in protecting cannabis cultivation facilities from damaging infestations. Here are the top five pests growers should watch out for, along with tips on how to spot them before they become a serious problem.
Spider mites are tiny arachnids that thrive in warm, dry environments — conditions common in many grow rooms. Though small (about the size of a grain of pepper), their damage is anything but minor. They feed by piercing plant cells and sucking out the contents, leading to tiny yellow or white speckles on leaves. Severe infestations cause leaves to turn bronze or silver and drop prematurely. Look for fine webbing on the undersides of leaves as a telltale sign of spider mites.
Aphids are soft-bodied insects that come in colors ranging from green to black, yellow, or even pink. They cluster on new growth, stems, and the undersides of leaves, sucking sap and weakening the plant. Aphids excrete a sticky substance called honeydew, which can attract mold and other pests. Early aphid infestations may appear as curling or distorted leaves, so regular inspection of tender shoots is essential.
Thrips are slender, tiny insects that feed on cannabis leaves by scraping the surface and sucking up the contents. This feeding causes silver or bronze streaks and speckling on foliage. They multiply quickly and are challenging to detect without close examination. Thrips prefer humid environments and can spread plant viruses, making early identification and control crucial.
Fungus gnats are small, dark flies often seen flying near soil or growing media. While adult gnats themselves don’t cause significant harm, their larvae feed on organic matter and roots, which can stunt plant growth and increase vulnerability to disease. Overwatering and poor drainage often exacerbate fungus gnat problems, so monitoring moisture levels is key.
Whiteflies are small, white, moth-like insects that congregate on the undersides of leaves. Like aphids, they suck sap from the plant, leading to yellowing, wilting, and reduced vigor. They also excrete honeydew, promoting mold growth. Whiteflies can be difficult to control once established, so preventive measures and early detection are vital.
Effective pest control in cannabis cultivation demands vigilance and specialized knowledge. At Secured Environments Pest and Wildlife Services, we provide customized integrated pest management plans tailored specifically to cannabis operations. Our team helps growers identify pests early, apply safe and compliant treatments, and maintain a healthy grow environment.
If you’re concerned about pests in your cannabis facility or want to set up a proactive pest management program, contact Secured Environments Pest and Wildlife Services today. Protect your investment and keep your crops thriving with expert help you can trust.