Field Identification
A gall midge whose maggots stunt upright tips into blackened crooks—classic ‘cranberry tip burn’ that growers curse during warm, humid stretches. Adults are tiny flies you will never see without a sweep net and optimism.
Injured tips swell then blacken; multiple generations can occur, slowing vine recovery. Damage is cosmetic early but repeated strikes reduce canopy and yield on stressed beds.
How to Deal With It
Organic Control Methods
Neem or spinosad timed to adult emergence—harder than Lepidoptera because adults are short-lived; oils risk phytotoxicity on bloom—check labels and bee restrictions.
Platygastrid and other tiny parasitic wasps attack midge larvae inside galls; lacewing larvae and minute pirate bugs pick off exposed eggs and young larvae when humidity supports them.
Avoid excessive nitrogen that pushes succulent tips; prune or mow vines to reset growth after heavy damage where bed management allows; improve drainage to reduce fungal follow-up in blackened tips.
Flooding can drown some larvae in tips if timed with extension guidance—do not improvise on commercial bogs without a plan.
Sticky traps in uprights for adult monitoring; scout weekly during shoot elongation in problem beds.
Let Nature Handle It
Natural Enemies
- Platygastrid Wasps
- Minute Pirate Bugs
- Lacewings
Threat Map