Integrated Pest Management for Raspberries

BLOOM/PRE-HARVEST (LATE MAY THROUGH EARLY JULY)

Acknowledgements

Nooksack IPM Advisory Committee

Introduction

Dormant and Pre-Bloom

Bloom/Pre-Harvest

Key Pests
Biology
Monitoring
Scouting Report
Matrix - Insects
Matrix - Diseases

Harvest Period

Post-Harvest

Insect Identification Sheets

Disease Identification Sheets

Tables and Charts

Pesticide Selection

IPM Resources

Pesticides and Water

PEST	BRIEF DESCRIPTION	DAMAGE/REASON FOR CONCERN	MONITORING APPROACHES	DECISION POINTS/ TOLERANCE	MANAGEMENT OPTIONS	FOLLOW UP
Spur Blight	Irregular-shaped brown lesions with yellow margins on fruiting lateral leaves. Brown wedge- shaped lesions on lower primocane leaves. Disease Cycle	Can damage fruiting lateral foliage, weaken primocane buds and increase susceptibility to winter injury.	Continue to examine fruiting laterals and primocane leaves for spur blight lesions.	Consider field disease history. Two weeks pre-bloom and early bloom period is key timing for preventative sprays.	Selected fungicides as applied for botrytis fruit rot.	Continue to monitor during harvest.
Botrytis Fruit Rot and Cane Botrytis	Botrytis infection of blossoms not easily seen. Gray powdery spores form on rotting berries. Fungus resides in immature fruit as latent infection. Disease Cycle	Reduces fruit quality and yield. Spores from fruit infection can infect and weaken cane tissue.	Examine fruit for gray mold.	Interval between protectant fungicide applications may be lengthened if weather is dry.	Fungicides at 10% and full bloom. Presence of diseased fruit may indicate need for fungicides during harvest period. Avoid overhead irrigation.	Examine fruit and canes during harvest.
Cane Blight	Fruiting canes are weak/brittle at catcher plate level. Disease can only enter new canes through wounds. Disease Cycle	Fruit laterals may wilt and die Infection of new canes can reduce yield in following year.	Inspection of fruiting canes by scraping away bark at catcher plate height to see vascular tissue.	Detection confirms need for fungicide application immediately after harvest.	Fungicide application to protect primocanes during and immediately after harvest.	Adjust catcher plates to minimize wounding during harvest. Avoid overhead irrigation.
Phytophthora Root Rot	Soilborne fungus which can cause root and crown rot. Infection favored by saturated soil conditions. Diseased plants have lack of feeder roots, poor vigor canes. Interior of major roots and crown are brown to black.	Damage seen as collapse of fruiting laterals, wilting primocanes with onset of hot weather. Reduced vigor and yield.	Note areas in field where these symptoms are seen. Decline can be extreme during harvest. Examine roots and crown from suspect areas to confirm root disease. Have crown and root tissue tested for the pathogen.	History of root rot problems. Consider varietal susceptibility, presence of disease symptoms, and confirmation that disease organism is present.	Fall and /or spring fungicides. Consider hilling rows up in existing fields or planting new fields into pre-shaped hills. Clean tillage equipment before moving from diseased fields to healthy fields.	Watch for symptoms just prior to and during harvest.