Ludwigia hyssopifolia (Linear-Leaf Water Primrose): Identification and Control
An erect annual with tiny four-petalled yellow flowers and a serious rice weed in Asia. How to identify it, tell it from invasive water primrose and control it.
Category: Invasive & Aquatic Weeds
Running vs Clumping Bamboo: Which Kinds Are Invasive and How to Contain Them
Running bamboo (Phyllostachys, Sasa) spreads 3-15 ft a year; clumping Fargesia and Bambusa do not. Barrier specs, 2-3 season removal, and where it is regulated.
Parthenium Weed (Carrot Grass, Congress Grass): Identification, Health Risks and Control
How to recognise parthenium weed from rosette to flower, why it causes dermatitis and crop loss, where it is declared, and how to control it safely.
Water Lettuce (Pistia stratiotes): Identification, Why It’s Invasive and How to Control It
How to identify water lettuce, why its mats choke ponds and canals, where it is illegal to keep or sell, and how to remove it by hand, herbicide or weevils.
How Japanese knotweed, giant hogweed, kudzu and water hyacinth were introduced, why they spread, how to identify them, their legal status and control.