Chinch bugs
Blissus spp.
Sap-feeding bugs that inject toxins, causing expanding patches of yellow then dead turf in sunny, dry areas.
Identification
A piercing-sucking insect best found in the thatch at the margins of yellowing patches on warm afternoons (the flotation/coffee-can method confirms presence). Black adults with white wings and red-to-black nymphs distinguish it.
Symptoms & Damage
Irregular yellow patches that turn brown, expand outward, and fail to green up with irrigation — mimicking drought; salivary toxins disrupt water/nutrient movement so damage is worst in sunny, dry areas.
Biology
Chinch bugs are true bugs with gradual metamorphosis — egg, five nymphal instars, and adult. They overwinter as adults in thatch; several overlapping generations occur per year with all stages present in summer; development is fastest above ~90F.
Occurrence & Spread
Outbreaks are driven by hot, dry, sunny conditions and concentrate in water-stressed, thatchy turf, peaking mid-to-late summer. Heavy thatch shelters them and binds insecticides.
Favorable Conditions
Hot, dry weather and thatchy, sunny turf.
Cultural Management
Reduce thatch, avoid drought stress with adequate irrigation, avoid excess nitrogen, plant endophytic/resistant cultivars, and conserve natural enemies such as big-eyed bugs.
Further Reading
University extension resources — open in a new tab.
Related Reports
No published reports yet for this pest.
Reports will appear here as they are peer-reviewed and published.