Integrated Pest Management for Raspberries

PHYTOPHTHORA ROOT ROT
Phytophthora fragariae

Acknowledgements

Nooksack IPM Advisory Committee

Introduction

Dormant and Pre-Bloom

Bloom/Pre-Harvest

Harvest Period

Post-Harvest

Insect Identification Sheets

Disease Identification Sheets

Fruit and Cane Botrytis

Spur Blight

Yellow Rust

Cane Blight

Phytophthora Root Rot

Tables and Charts

Pesticide Selection

IPM Resources

Pesticides and Water

Summer collapse of primocanes, a typical symptom of Phytophthora root rot in raspberries.  (Photo courtesy P. R. Bristow)

Burning or scorched appearance of raspberry primocane leaf tips caused by water stress from Phytophthora root rot infection. (Photo courtesy R.  Byther)

Summer collapse of 2nd year Meeker raspberry planting  caused by Phytophthora root rot. (Photo courtesy P. R. Bristow)

Standing water within a raspberry field (mid-winter)  can predispose plants to root dysfunction and plant decline even in the absence of Phytophthora.  (Photo courtesy G. Menzies)

Hilling soil in raspberry row; a cultural practice designed to improve water drainage from roots and minimize the likelihood of Phytophthora infection.  (Photo courtesy P. R. Bristow)