Arthropod pests
Leafhoppers & Other Mobile Sap Feeders
Mobile sap-feeding insects can create stippling, chlorosis, distortion, or localized feeding marks, but damage pattern alone rarely identifies the insect responsible.
What to look for
- Small wedge-shaped insects that move quickly or jump
- Feeding injury on leaves
- Cast skins or insects along veins and leaf undersides
- Hotspots near entry points in protected structures or field edges outdoors
Important look-alikes
- Thrips feeding
- Mite stippling
- Spray injury
- Environmental flecking or mechanical damage
How to confirm
- Observe the insect directly
- Use sweep, tap, or sticky-card monitoring where appropriate
- Inspect fresh injury rather than old damaged leaves alone
- Record insect abundance with symptom progression
Management principles
- Identify the insect before selecting a tactic
- Limit entry and movement where practical
- Use scouting to determine whether pressure is increasing or transient
- Consider vector risk only when a relevant pathogen and vector relationship is established
Prevention
- Maintain exclusion and sanitation around openings
- Control volunteer host plants where appropriate
- Inspect outdoor edges and greenhouse vents
- Keep monitoring records
Visual study guide
- Leafhopper identification plate
- Feeding-damage comparison
- Greenhouse entry-point map
- Direct observation workflow