In this section
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Susceptibility of Conifer Seedlings to Phytophthora Root Rot Reviewed: March 2023
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Plants Susceptible to Phytophthora Diseases Reviewed: March 2023
Healthy rhododendron root system (left) and three rhododendron root systems with Phytophthora root rot (right).
Jerry Weiland, 2016.
The bark has been stripped off to show the cambium which becomes a reddish-brown color when infected. Also note the clear transition between infected and healthy cambial tissue.
Photo by Phil Hamm
Standing water can occur due to gravel settling or filling in with plant debris or spilled container media.
Pots sitting on plastic sheeting can create a depression that holds water and encourages root rot.
Well drained areas can accidentally get plugged up flooding unsuspecting plants.
Hoses that come in contact with greenhouse floors, drains or contaminated plants can spread propagules of these organisms.
Phytophthora Root Rot is a problem wherever standing water occurs such as the bottom of this hill where there are dead and dying plants.
Phytophthora Root Rot is a problem wherever standing water occurs such as where these plants get splashed everytime a vehicle goes by.
In this section
Tractor is pulling shanks injecting fumigant at 18 inches depth followed by a disk (bottom right) to close the furrows and then followed by a packer (bottom left) to compress and seal the soil.
Russ Ingham.
Spray nozzle visible applying red glue to seam which seals the two tarps together.