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Call Calla: Identify, Control, and Manage the Invasive Species

Introduction
Call Calla (Zantedeschia aethiopica) is a non-native aquatic plant that has become an invasive species in many parts of the world. It poses significant threats to native ecosystems, biodiversity, and infrastructure. This blog post provides comprehensive information on Call Calla, including its identification, control, and management strategies.
Identification
Physical Characteristics
- Large, showy white flowers with prominent stalks
- Glossy, arrow-shaped green leaves with a central crease
- Thick, fibrous root system
- Can grow up to 2 meters (6.5 feet) tall
Habitat
Call Calla prefers wet and marshy habitats, such as:
- Wetlands
- Creeks and streams
- Lakes and ponds
- Ditches and irrigation canals
Impacts
Environmental Impacts
- Native Species Displacement: Outcompetes native plants for resources, leading to biodiversity loss.
- Habitat Alteration: Forms dense stands, blocking sunlight and reducing oxygen levels in water bodies.
- Waterway Blockage: Accumulations of Call Calla can obstruct waterways, disrupting navigation and water flow.
Infrastructure Impacts
- Ditch and Canal Clogging: Can obstruct water flow, leading to flooding and irrigation problems.
- Hydroelectric Interference: Dense stands can impede water intake systems for power generation.
Control and Management
Mechanical Control
- Hand Removal: Physically pulling or digging up plants is effective in small infestations.
- Mowing: Regular mowing can prevent flowering and seed production.
- Excavation: Removing large infestations using heavy machinery may be necessary.
Chemical Control
Herbicides may be used to control Call Calla, but should be applied by licensed professionals and according to label instructions. Commonly used herbicides include:
- Glyphosate
- Imazapyr
- Fluazifop-P-butyl
Biological Control
Currently, there are no approved biological control agents for Call Calla.
Integrated Pest Management
The most effective approach is an integrated approach that combines multiple control methods, such as:
- Mechanical removal for small infestations
- Chemical control for larger infestations
- Monitoring and early detection to prevent further spread
Prevention
- Plant Native Species: Planting native species around water bodies can help outcompete Call Calla.
- Clean Equipment: Remove plant fragments from machinery and equipment before moving to other areas.
- Limit Water Flow: Control water flow to prevent Call Calla from spreading downstream.
Conclusion
Call Calla is a highly invasive species that poses significant threats to ecosystems and infrastructure. By understanding its identification, impacts, and management strategies, we can effectively control and mitigate its spread. Collaboration between landowners, government agencies, and community groups is crucial for successful Call Calla management.
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