Original illustration by PestControlBasics.com. Use anatomical labels above to confirm your identification.
🔍 Identification
Adults: 1-1.5mm; white powdery wings; hold wings at angle (vs greenhouse whitefly which holds wings horizontal — the diagnostic difference). Nymphs: scale-like, pale yellow, on leaf undersides. Found on: tomato, pepper, cucumber, squash, melon, ornamentals, poinsettia (major problem in commercial production). Causes: direct feeding damage, honeydew and sooty mold, and critically, transmission of 100+ plant viruses — including tomato yellow leaf curl virus.
🧬 Biology & Behavior
Silverleaf whitefly (biotype B of Bemisia tabaci) is more damaging than greenhouse whitefly due to greater reproductive rate, wider host range, and ability to transmit geminiviruses. Documented resistance to organophosphates, carbamates, pyrethroids, and neonicotinoids in many populations — resistance management requires strict rotation of IRAC mode-of-action groups.
⚠️ Damage & Health Risk
Plant death from direct feeding; sooty mold on honeydew reducing photosynthesis; transmission of 100+ plant viruses; resistance to most available insecticides; billion-dollar losses in commercial vegetable and ornamental production.
🔧 DIY Treatment
Rotation strategy: IRAC Group 4A (imidacloprid) → 4C (sulfoxaflor) → 23 (spiromesifen/Oberon) → 13 (spirotetramat) → back to 4A after 2 seasons. Yellow sticky traps for early detection. Botanical oils and insecticidal soap provide supplemental soft control. Never use the same IRAC group twice consecutively.
👷 When to Call a Pro
Commercial: Authorized distributor consultation for resistance management programs — current resistance profiling in your region determines which modes of action remain effective locally.