Phytophthora: An Old Problem with New Challenges - Citrus Industry Magazine
Phytophthora Root and Crown Rot of Fruit Trees | Ohioline
Citrus Collar Rot June Update - Leaf, Root & Fruit Gardening Services
collar rot on citrus? (trees forum at permies)
Fungal Diseases of Citrus | International Organization of Citrus Virologists
File:Lemon tree with phytophtora 02 - collar rot.jpg - Wikimedia Commons
Citrus root & collar rot (264)
Citrus collar rot? Help
Collar Rot - Barmac Pty Ltd
Phytophthora Cactorum | Mauget
How to Identify, Prevent, and Treat Collar and Crown Rot in Fruit Trees
How to Identify, Prevent, and Treat Crown Rot | Gardener's Path
Forum: Citrus Disease
How to control Citrus Collar Rot | Yates
How to Identify, Prevent, and Treat Collar and Crown Rot in Fruit Trees
Tips to Prevent and Treat Phytophthora in CA Citrus : Syngenta – Know More, Grow More
Fungal Diseases of Citrus | International Organization of Citrus Virologists
Root Rot, collar rot
How to Get Rid of Root & Collar Rot in Your Garden | Yates Australia
Phytophthora Crown, Collar and Root Rot of Apple and Cherry | WSU Tree Fruit | Washington State University
Dry root rot disease, an emerging threat to citrus industry worldwide under climate change: A review - ScienceDirect
Phytophthora Crown, Collar and Root Rot of Apple and Cherry | WSU Tree Fruit | Washington State University
Phytophthora & collar rot – Grow Great Fruit
