Why Are Bugs on My Plants?

Identify common pests and learn organic control methods

Quick Pest ID Guide

Tiny green/black clusters: Aphids on new growth
White cottony masses: Mealybugs in leaf joints
Fine webbing + speckles: Spider mites (dry conditions)
Small flying gnats: Fungus gnats in wet soil

Common Pests & Treatments

Aphids

Small soft-bodied insects that cluster on new growth and flower buds. They excrete sticky honeydew. Treatment: Blast off with water, spray with insecticidal soap, or introduce ladybugs. Check plants weekly to catch early.

Spider Mites

Tiny dots that create fine webbing on undersides of leaves. Leaves become speckled and bronzed. Treatment: Spray with water, increase humidity, apply neem oil. These thrive in dry conditions - misting helps prevent them.

Fungus Gnats

Small flies that breed in moist soil. Adults are harmless but annoying; larvae can damage roots. Treatment: Let soil dry between waterings, use yellow sticky traps, apply mosquito bits (Bti) to kill larvae.

Mealybugs

White, cottony insects that hide in leaf joints and stem crevices. Treatment: Dab with rubbing alcohol on cotton swab, spray with neem oil, or use insecticidal soap. Check thoroughly - they hide in crevices.

Frequently Asked Questions

What are the tiny white bugs on my plants?
Tiny white bugs are usually mealybugs, whiteflies, or aphids. Mealybugs look cottony and cluster in leaf joints. Whiteflies are tiny moths that fly when disturbed. White aphids cluster on new growth. All can be treated with insecticidal soap or neem oil.
Why do I have gnats flying around my plants?
Small flying gnats are likely fungus gnats, which breed in moist potting soil. The adults are harmless but larvae can damage roots. Fix: Let soil dry between waterings, use sticky traps for adults, and apply mosquito bits or beneficial nematodes to kill larvae.
How do I get rid of spider mites?
Spider mites thrive in dry conditions and create fine webbing. Treat by spraying leaves (especially undersides) with water, then apply neem oil or insecticidal soap weekly. Increase humidity around plants. Remove heavily infested leaves.
Are all bugs on plants harmful?
No! Many bugs are beneficial. Ladybugs eat aphids, parasitic wasps control caterpillars, and spiders catch flying pests. Don't spray beneficial insects. Learn to identify helpful bugs before treating. Organic methods preserve beneficial insects better than chemicals.
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