Temperature and Fungicide Sensitivity in Three Prevalent Species Causing Phytophthora Root Rot in Rhododendron.

Temperature is an important environmental variable affecting spp. biology. It alters the ability of species to grow, sporulate, and infect their plant host, and it is also important in mediating pathogen responses to disease control measures.

Is Disease Induced by Flooding Representative of Nursery Conditions in Rhododendrons Infected with or ?

The degree of flooding commonly used to induce disease in Phytophthora root rot studies rarely occurs in container nurseries. Instead, over-irrigation and poor drainage result in plants periodically sitting in shallow pools of water. Rhododendron plants were grown in a noninfested substrate or substrate infested with or to determine whether root rot induced by flooding represents disease that occurs under simulated nursery conditions when plants are in a shallow pool of water (saucers), or are allowed to freely drain and maintained at ∼75% container capacity (CC).