Root Rot and Rhizome Rot
Caused by: Pectobacterium carotovora
This is a primary concern for rooted aquatic plants like water lilies (Nymphaea?spp.), lotuses, and marginal plants
Introduction
These pathogens are naturally present in aquatic environments and soil, thriving in anaerobic (low oxygen) conditions and warm temperatures. They break down root and rhizome tissue, leading to plant collapse
Identification
?Above water, leaves may yellow, wilt, and die. Below water, roots and rhizomes become mushy, blackened, or translucent, and a foul smell may be present due to bacterial decay.
Pathogen Characteristics
Prevention & Treatment
Prevention Measures
1-Ensure adequate oxygenation in the water column or substrate.
2-Avoid thick, organic-rich substrates that become anaerobic.
3-Purchase healthy, firm-rhizomed plants from reputable sources.
4-Practice good hygiene: use sterilized equipment when dividing or potting plants
Treatment Options
Remove severely affected plant parts. Improving water circulation and aeration can slow progression. In controlled aquarium or pond systems, some specific fungicides or bactericides might be applicable, but often removal of the entire infected plant is recommended to prevent spread.
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