Blackberry IPM Module
Practical IPM plan for blackberries covering tunnel, protected and outdoor blackberry production.
This page focuses on SWD, spider mite, aphids, thrips, cane pests, Botrytis and canopy management.
Quick summary
Main pest risks
SWD, spider mite, aphids, thrips, cane pests and raspberry beetle-type fruit pests.
Main disease pressure
Botrytis and fruit rots increase in dense humid canopies and where waste fruit accumulates.
Main IPM principle
Keep the crop open, harvest cleanly and remove damaged or overripe fruit quickly.
Blackberries share many IPM challenges with raspberries, but dense vigorous canopy growth can create stronger humidity and airflow problems.
Tunnel blackberries can also create ideal late-season conditions for SWD and Botrytis if harvest hygiene slips.
Main pest risks
| Pest | Risk level | Key trigger | Inspect |
|---|---|---|---|
| Spotted Wing Drosophila | Very High | Ripening fruit and waste fruit | Fruit and waste fruit |
| Spider mites | High | Hot dry tunnel conditions | Lower leaves |
| Aphids | Moderate | Soft growth and sheltered canes | Shoot tips |
| Thrips | Moderate | Warm flowering conditions | Flowers and fruit |
| Cane pests | Moderate | Damaged cane tissue | Cane bases and wounds |
| Raspberry beetle-type pests | Moderate | Flowering and fruit set | Flowers and developing fruit |
| Botrytis | High | Dense humid canopy | Fruit and flowers |
| Fruit rots | Moderate–High | Damaged or overripe fruit | Ripening fruit |
Crop stage plan
| Crop stage | Main risk | Practical focus |
|---|---|---|
| Dormant / pruning | Carryover pests and disease | Remove old canes and debris |
| New growth | Aphids and early mite | Inspect shoot tips and lower leaves |
| Flowering | Thrips and fruit pests | Flower monitoring and airflow |
| Fruit set | Botrytis and capsid-type damage | Canopy management |
| Ripening | SWD and fruit rot | Tight harvest hygiene |
| Late crop | SWD escalation | Remove waste fruit rapidly |
| Post-harvest | Carryover reduction | Clean-down and pruning hygiene |
Monitoring plan
| Area | What to look for | Frequency |
|---|---|---|
| Ripe fruit | SWD risk and damaged fruit | Every picking cycle |
| Waste fruit | Fallen and overripe fruit | Every picking cycle |
| Lower leaves | Spider mite and bronzing | Weekly |
| Shoot tips | Aphids and distortion | Weekly |
| Flowers | Thrips and beetle activity | During flowering |
| Cane wounds | Disease and cane pest entry | Weekly |
| Dense canopy zones | Botrytis and humidity | Weekly |
Environmental risk
| Condition | Likely issue | Management response |
|---|---|---|
| Ripening fruit + waste fruit | SWD | Increase picking and remove waste |
| Dense humid canopy | Botrytis and fruit rot | Improve airflow and cane spacing |
| Hot dry tunnels | Spider mite | Inspect lower leaves and reduce stress |
| Soft vigorous growth | Aphids | Manage crop balance |
| Wet flowers and fruit | Botrytis | Improve dry-down |
| Damaged canes | Cane disease and pests | Remove damaged tissue |
| Nearby unmanaged fruit | SWD reservoir pressure | Improve surrounding hygiene |
Biological control programme
Preventative phase
Focus on:
- clean pruning
- removal of old canes
- monitoring lower leaves
- supporting naturally occurring predators
- reducing carryover between seasons
Flowering phase
During flowering:
- inspect flowers regularly
- monitor thrips activity
- maintain airflow
- avoid prolonged wet flowers
- reduce hidden humid zones
Ripening phase
During ripening:
- shorten picking intervals
- remove damaged fruit immediately
- reduce fruit reservoirs
- monitor SWD risk closely
- maintain tunnel hygiene
Pest-specific notes
SWD
Spotted Wing Drosophila is one of the main blackberry risks during ripening.
Key actions:
- harvest frequently
- remove waste fruit
- avoid overripe fruit accumulation
- monitor damaged fruit carefully
- reduce unmanaged fruit reservoirs nearby
Spider mites
Spider mites are most problematic in hot tunnel crops.
Key actions:
- inspect lower leaves
- monitor warm edges
- reduce crop stress
- support predatory mites
- prevent hotspots joining together
Aphids
Aphids are linked to vigorous soft growth.
Key actions:
- inspect growing tips
- avoid excessive nitrogen
- preserve beneficial insects
- respond early to colonies
Thrips
Thrips may affect flowers and fruit finish.
Key actions:
- inspect flowers during warm periods
- monitor hotspots
- preserve predators
- avoid unnecessary disruption
Cane pests
Cane pests are linked to damaged or stressed canes.
Key actions:
- inspect cane wounds
- remove damaged canes
- maintain pruning hygiene
- improve airflow around cane bases
Botrytis and fruit hygiene
Botrytis risk increases where:
- fruit remains overripe
- flowers stay wet
- canopy becomes dense
- airflow is poor
- damaged fruit accumulates
Useful actions:
- pick regularly
- remove infected fruit
- improve airflow
- remove old plant material
- avoid leaving fruit waste under rows
Canopy and hygiene
Good blackberry canopy management improves:
- airflow
- fruit drying
- monitoring visibility
- harvest access
- spray penetration where used
- reduction of humid hotspots
Useful practices:
- remove old canes
- reduce overcrowding
- maintain open rows
- remove fallen fruit
- improve airflow through tunnels
- reduce hidden humid zones
Seasonal calendar
| Period | Main IPM focus |
|---|---|
| Dormant / pruning | Remove old canes and reduce carryover |
| Early growth | Aphids and early mite monitoring |
| Flowering | Thrips and airflow |
| Fruit set | Botrytis prevention and canopy management |
| Ripening | SWD and harvest hygiene |
| Late season | Tight picking and waste fruit removal |
| Post-harvest | Clean-down and pruning hygiene |
Linked tools
Use this module alongside:
Key message
Blackberry IPM depends heavily on harvest discipline, airflow and fruit hygiene.
The strongest programmes prevent SWD and Botrytis reservoirs from building inside the crop while maintaining predator activity and reducing environmental stress.