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Asiatic witchweed
Also known as: Common mealie witchweed, Maize witchweed
Asiatic witchweed is considered an invasive pest to crops in places like Uganda, Kenya, and Tanzania. It is parasitic, and the young plants are hidden entirely underground where they attach themselves to the roots of sugarcane, sorghum, corn, and rice plants. Asiatic witchweed variants from different regions can sometimes be identified by the color of their flowers.
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Annual
Lifespan
15 cm to 60 cm
Plant Height
1.5 cm
Flower Size
White, Yellow, Red, Orange
Flower Color
Semi-evergreen
Leaf type
20 - 35 ℃
Ideal Temperature

Images of Asiatic witchweed

Distribution of Asiatic witchweed

Distribution Map
Striga asiatica, known as asiatic witchweed, has a prominent presence in Asia and Africa, where it is native. It spans various ecosystems across these continents, having adapted to diverse climatic conditions. Beyond its native range, asiatic witchweed is sometimes thought to be established in additional regions, where it may have an impact on local ecosystems, particularly in parts of Southeast Asia and Oceania. As asiatic witchweed adapts to new habitats, certain areas are monitoring its growth to evaluate potential ecological effects.
Native
Cultivated
Invasive
Introduced
No species reported
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Habitat
Maize fields
Hemisphere Trend Curve

Weed Control

Asiatic witchweed is a parasitic weed of a number of important agricultural crops. It can cause significant yield loss.
How to Control It
Asiatic witchweed is usually eradicated with the help of herbicides. Consult an expert to find the best active substance and formulation for your geographical region. Follow the instructions on the label carefully, and spray on a windless day to avoid drift and negative effects on non-target species.
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Care Guide for Asiatic witchweed

Every week
Water
Full sun
Sunlight
20 - 35 ℃
Ideal Temperature
Water: Asiatic witchweed thrives in tropical savannas and prefers drier conditions, showing moderate drought tolerance. Watering should occur weekly, avoiding overwatering. Primarily grown outdoors, asiatic witchweed significantly grows during the rainy season, aligning its life cycle with water availability.
Fertilize: Fertilize asiatic witchweed quarterly with balanced or high nitrogen fertilizers on moist soil to enhance plant health and resilience. Adjust the amount based on growth stage and reduce in winter. Wear gloves due to asiatic witchweed's toxicity; dilute fertilizer for seedlings to prevent over-fertilization.
Pruning: Asiatic witchweed features bright green leaves and vibrant flowers. Prune from early to late spring, removing dead branches first, then trim overgrown areas for better air circulation. This promotes growth and prevents pests. Use clean, sharp tools to avoid damage and infection.
Propagation: Asiatic witchweed is a parasitic plant that attaches to grass roots for nutrients. Close proximity to host plants enhances germination. Gardeners should handle seeds gently, ensuring even distribution and minimal soil disturbance to promote a favorable environment for successful establishment.
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