{"id":9790,"date":"2025-10-20T02:29:17","date_gmt":"2025-10-20T02:29:17","guid":{"rendered":"https:\/\/terrain.org.au\/?p=9790"},"modified":"2025-10-30T04:14:09","modified_gmt":"2025-10-30T04:14:09","slug":"amazon-frogbit","status":"publish","type":"post","link":"https:\/\/terrain.org.au\/amazon-frogbit\/","title":{"rendered":"Know Your Weeds: Amazon Frogbit"},"content":{"rendered":"[mk_page_section bg_image=&#8221;https:\/\/terrain.org.au\/wp-content\/uploads\/2025\/09\/amazon-frogit_banner.jpg&#8221; bg_position=&#8221;center center&#8221; bg_repeat=&#8221;no-repeat&#8221; bg_stretch=&#8221;true&#8221; enable_3d=&#8221;true&#8221; min_height=&#8221;500&#8243; js_vertical_centered=&#8221;true&#8221; padding_top=&#8221;&#8221; padding_bottom=&#8221;&#8221; section_id=&#8221;donate&#8221; el_class=&#8221;donate-1&#8243; sidebar=&#8221;sidebar-1&#8243;][vc_column][vc_empty_space height=&#8221;70px&#8221;][mk_fancy_title font_family=&#8221;none&#8221; align=&#8221;center&#8221;]BIOSECURITY RISKS OF THE WET TROPICS[\/mk_fancy_title][mk_padding_divider size=&#8221;67&#8243;][\/vc_column][\/mk_page_section][mk_page_section section_id=&#8221;great-1&#8243; sidebar=&#8221;sidebar-1&#8243;][vc_column width=&#8221;1\/2&#8243; css=&#8221;.vc_custom_1563789112768{padding-right: 36px !important;padding-left: 0px !important;}&#8221; el_class=&#8221;great_header_left&#8221;][mk_padding_divider size=&#8221;100&#8243; visibility=&#8221;hidden-nb&#8221;][mk_padding_divider size=&#8221;15&#8243; visibility=&#8221;visible-sm&#8221;][mk_padding_divider visibility=&#8221;visible-tl&#8221;][mk_fancy_title size=&#8221;28&#8243; letter_spacing=&#8221;4&#8243; margin_bottom=&#8221;0&#8243; font_family=&#8221;none&#8221; el_class=&#8221;terrain-title-2&#8243;]AMAZON FROGBIT[\/mk_fancy_title][mk_padding_divider size=&#8221;60&#8243; visibility=&#8221;hidden-nb&#8221;][mk_padding_divider size=&#8221;20&#8243; visibility=&#8221;visible-nb&#8221;][vc_column_text el_class=&#8221;sub-head&#8221; css=&#8221;.vc_custom_1759118928066{margin-bottom: 0px !important;}&#8221;]20 OCTOBER 2025[\/vc_column_text][mk_padding_divider size=&#8221;5&#8243;][vc_column_text css=&#8221;.vc_custom_1759118976241{margin-bottom: 0px !important;}&#8221;]Amazon Frogbit (<em>Limnobium laevigatum<\/em>) is a fast-spreading aquatic plant that poses a serious biosecurity risk to waterways across the Wet Tropics. Originally introduced for ornamental use in aquariums and ponds, it has become highly invasive, forming dense mats that smother native aquatic vegetation, reduce oxygen levels, and disrupt freshwater ecosystems.<\/p>\n<p><strong>WHAT IS IT?<\/strong><\/p>\n<p><strong>Amazon Frogbit (Limnobium laevigatum)<\/strong> is a floating aquatic plant, native to Central and South America. It was introduced for use in aquariums and ponds but has become highly invasive in many regions, including parts of Queensland.<\/p>\n<p><strong>WHY IS IT A PROBLEM?<\/strong><\/p>\n<p>Amazon Frogbit forms dense mats on water surfaces, smothering native aquatic plants and reducing oxygen levels in the water. This disrupts ecosystems, harms aquatic life, and can block waterways, impacting recreational activities and water management infrastructure.<\/p>\n<p><strong>CHARACTERISTICS<\/strong><\/p>\n<p>Amazon Frogbit has bright green, rounded leaves that float on the water\u2019s surface, forming rosettes. Its roots dangle below the surface, creating a dense network. The plant produces small white flowers and spreads rapidly through vegetative reproduction. It thrives in tropical and subtropical climates, and can impact ponds, dams, and slow-moving<br \/>\nwaterways.<\/p>\n<p><strong>HOW TO SPOT IT ON YOUR PROPERTY<\/strong><\/p>\n<p>Look for floating clusters of round, bright-green leaves with spongy undersides. The roots are long and feathery, hanging below the water. It often forms thick mats that cover the water surface. Amazon frogbit currently occurs in the Barron River catchment between Yungaburra and Cairns. All detections in other locations should be reported to your local government immediately.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/2&#8243; css=&#8221;.vc_custom_1563789122720{padding-right: 0px !important;padding-left: 34px !important;}&#8221; el_class=&#8221;great_header_right&#8221;][mk_padding_divider size=&#8221;206&#8243; visibility=&#8221;hidden-sm&#8221;][mk_padding_divider size=&#8221;50&#8243; visibility=&#8221;hidden-sm&#8221;][vc_video link=&#8221;https:\/\/www.youtube.com\/watch?v=NS-SOK-dbaY&#8221;][mk_padding_divider size=&#8221;50&#8243; visibility=&#8221;hidden-sm&#8221;][vc_column_text css=&#8221;.vc_custom_1759119080222{margin-bottom: 0px !important;}&#8221;]<strong>WHAT TO DO ABOUT IT\u00a0<\/strong><\/p>\n<ul>\n<li><strong>Prevention:<\/strong> Avoid trading or introducing Amazon Frogbit to ponds or aquariums. Report all infestations outside the Barron River catchment to local biosecurity authorities. Dispose of aquarium contents responsibly. Contact your local council if you are unsure.<\/li>\n<li><strong>Physical removal:<\/strong> Carefully remove plants and roots, ensuring no fragments are left behind. Dispose of them securely through deep burial to prevent spread.<\/li>\n<li><strong>Chemical control:<\/strong> Use approved aquatic herbicides. Consult the Biosecurity Queensland Amazon frogbit pest fact for safe application.<\/li>\n<\/ul>\n[\/vc_column_text][vc_column_text css=&#8221;.vc_custom_1759114191705{margin-bottom: 0px !important;}&#8221;]<strong>RESOURCES:<\/strong><\/p>\n<p>Check out your Local Government\u2019s Biosecurity Plan available through your Council\u2019s website.<\/p>\n<p>Refer to the Queensland Government Pest Fact for Amazon frogbit for detailed control information and herbicide rates.<\/p>\n<p><a href=\"https:\/\/terrain.org.au\/wp-content\/uploads\/2025\/09\/ter2212_biosecurityfactsheet_amazonfrogbit_a5.pdf\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-9717\" src=\"https:\/\/terrain.org.au\/wp-content\/uploads\/2025\/09\/amazon-frogbit1-web.jpg\" alt=\"\" width=\"150\" height=\"150\" srcset=\"https:\/\/terrain.org.au\/wp-content\/uploads\/2025\/09\/amazon-frogbit1-web.jpg 150w, https:\/\/terrain.org.au\/wp-content\/uploads\/2025\/09\/amazon-frogbit1-web-1024x1024.jpg 1024w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><strong>Download factsheet<\/strong><\/a><\/p>\n[\/vc_column_text][\/vc_column][\/mk_page_section][mk_page_section el_class=&#8221;grean-btn-sec&#8221; sidebar=&#8221;sidebar-1&#8243;][vc_column][mk_padding_divider size=&#8221;47&#8243; visibility=&#8221;hidden-sm&#8221;][mk_button dimension=&#8221;outline&#8221; url=&#8221;https:\/\/terrain.org.au\/biosecurity-risks\/&#8221; align=&#8221;right&#8221; el_class=&#8221;green-btn&#8221; outline_skin=&#8221;custom&#8221; outline_active_color=&#8221;#175137&#8243; outline_active_text_color=&#8221;#ffffff&#8221; outline_hover_bg_color=&#8221;#175137&#8243; outline_hover_color=&#8221;#ffffff&#8221;]Read More[\/mk_button][mk_padding_divider size=&#8221;100&#8243; visibility=&#8221;hidden-sm&#8221;][\/vc_column][\/mk_page_section][mk_page_section section_id=&#8221;great-1-blog&#8221; sidebar=&#8221;sidebar-1&#8243;][vc_column][mk_padding_divider size=&#8221;105&#8243; visibility=&#8221;hidden-sm&#8221;][mk_fancy_title size=&#8221;28&#8243; letter_spacing=&#8221;4&#8243; margin_bottom=&#8221;0&#8243; font_family=&#8221;none&#8221; align=&#8221;right&#8221; el_class=&#8221;terrain-title&#8221;]RELATED NEWS[\/mk_fancy_title][mk_padding_divider visibility=&#8221;hidden-sm&#8221;][\/vc_column][\/mk_page_section][vc_row fullwidth=&#8221;true&#8221; fullwidth_content=&#8221;false&#8221; id=&#8221;post_grid_filter_1&#8243;][vc_column][vc_column_text el_class=&#8221;grid_greate_3&#8243; css=&#8221;.vc_custom_1743711316392{margin-bottom: 0px !important;}&#8221;]\n<p style=\"text-align: center;\">\t\t<div class=\"pgafu-post-grid-main pgafu-design-1 pgafu-image-fit pgafu-grid-3 pgafu-clearfix \">\r\n\t\t\t<div class=\"pgafu-post-grid  pgafu-medium-4 pgafu-columns  pgafu-first\">\r\n\t<div class=\"pgafu-post-grid-content \">\r\n\t\t\t\t\t<div class=\"pgafu-post-image-bg\" style=\"\">\r\n\t\t\t\t<a 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