Learn how to detect Huanglongbing
- Inspect for Asian citrus psyllids monthly. Look for small, brown pests that feed on citrus leaves with their body at a 45-degree angle.
- Young Asian citrus psyllids, called nymphs, produce a white, waxy substance to direct honeydew away from their bodies.
- Asian citrus psyllids are small – no more than 1/8th of an inch long – brown, winged insects that feed on citrus tree leave
- Huanglongbing causes uneven yellowing in citrus tree leaves because nutrients are being restricted.
- Huanglongbing is also known as citrus greening disease because it causes fruit to stay green and not fully ripen.
- Agriculture officials track the presence of pests like the Asian citrus psyllid by placing yellow sticky traps in citrus trees throughout the state. When you allow these traps on your property, you help protect California citrus.
- If you think you have spotted the pest or disease, call the free statewide pest hotline at 800-491-1899.