{"id":197102,"date":"2025-02-28T10:00:00","date_gmt":"2025-02-28T09:00:00","guid":{"rendered":"https:\/\/www.growbarato.net\/blog\/?p=197102"},"modified":"2025-02-18T17:15:19","modified_gmt":"2025-02-18T16:15:19","slug":"the-best-natural-remedies-to-combat-the-fungus-gnat","status":"publish","type":"post","link":"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/","title":{"rendered":"The best natural remedies to combat the fungus gnat"},"content":{"rendered":"\n<p>When we think about pests that affect our plants, we usually associate them with the warmer months when bugs tend to appear. However, we shouldn&#8217;t let our guard down during the colder months because some insects emerge when temperatures drop. One of these insects is the fungus gnat, which can <strong>silently ruin a crop.<\/strong><\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-6a30d07304c39\" class=\"ez-toc-cssicon-toggle-label\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Contenido<\/p>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a30d07304c39\"  \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#What_is_the_fungus_gnat\" >What is the fungus gnat?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#How_to_detect_it\" >How to detect it?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#Why_do_fungus_gnats_appear\" >Why do fungus gnats appear?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#How_to_get_rid_of_fungus_gnats\" >How to get rid of fungus gnats<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#Drying_the_soil\" >Drying the soil<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#Removing_dead_leaves\" >Removing dead leaves<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#Using_vermiculite\" >Using vermiculite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#Phototropic_Traps\" >Phototropic Traps<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#Potassium_Soap\" >Potassium Soap<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#Neem_oil\" >Neem oil<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#Using_nematodes\" >Using nematodes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#Diatomaceous_earth\" >Diatomaceous earth&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/#Replacing_the_substrate\" >Replacing the substrate<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_the_fungus_gnat\"><\/span><strong>What is the fungus gnat?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>This dark-colored fly, belonging to the dipteran family, is often mistaken for a mosquito. They are small, measuring 1 to 4 mm, and live only a few days, less than a week, and love the moist soil in indoor plant pots, the perfect place to reproduce and die. They lay eggs in the substrate, <strong>up to 400 in each batch.<\/strong> Within a few days, larvae hatch from these eggs and begin feeding on the roots to grow. After three weeks, they become pupae and then undergo metamorphosis into adult flies.<\/p>\n\n\n\n<p>As you can see, these insects reproduce rapidly and in large numbers, which can cause severe, sometimes irreversible, damage to plants.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXf8sefyvBobO5w6qCHjm3_vYtcVVZoc5Lt9-V7MHKq3_WtnNkgjWzZEhWF_8BAslfn4tgcaWYJUV9kpl2PN0aEe8DYifB4epE61o24kOLvlp-Cii7hOUnjD9WLA4dQd7ux5vL9ytQ?key=zzreTorfLHCUFrX18YkxsmMh\" alt=\"fungus gnat\"\/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_detect_it\"><\/span><strong>How to detect it?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Sometimes, detecting a pest of fungus gnat isn&#8217;t easy until it&#8217;s too late. When a plant is infected, it may show several symptoms. Firstly, <strong>the plant stops growing, and its leaves begin to lose color and strength.<\/strong> Additionally, fungus gnats can carry <strong>various types of fungi<\/strong> such as Pythium, Phytophthora, Fusarium, Verticillium, or Botrytis, which could ultimately kill the plant.<\/p>\n\n\n\n<p>The best way to identify fungus gnats is to inspect the substrate, where they live. When watering, you can gently tap the pot to disturb the soil, at which point you might see adult gnats <strong>scurrying across the soil or flying away.<\/strong> They don\u2019t usually move around the leaves or the plant\u2019s surroundings but instead stay on the soil almost all the time.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_do_fungus_gnats_appear\"><\/span><strong>Why do fungus gnats appear?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>This pest is very common in agriculture and gardens, especially in greenhouses or indoor grows. It tends to appear when the environment has <strong>humidity above 70% and a temperature over 23\u00baC<\/strong>, conditions that are easily met in indoor cannabis cultivation.<\/p>\n\n\n\n<p>Additionally, these gnats love constant moisture and are particularly attracted to waterlogged soils.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_get_rid_of_fungus_gnats\"><\/span><strong>How to get rid of fungus gnats<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Once we identify the presence of this annoying pest, it\u2019s time to act quickly. There are several possible solutions.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXeeoRPXUP4rIlO9PE-pBxdWu8S3gXdPWMg-shFFA7dfgzRPJacElsAdhadPH4ymsnvYjTI110F_WL7Xc-StOXloXz9Y9mVnnZjwevlZ50AFQbGWk9-SMmmTIO4Awc3B6xyhUB4CHw?key=zzreTorfLHCUFrX18YkxsmMh\" alt=\"fungus gnats\"\/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Drying_the_soil\"><\/span><strong>Drying the soil<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>As we\u2019ve seen, <strong>fungus gnats love very moist soil<\/strong>, so it can be helpful to let the top layer of the pot dry out between waterings. The problem is that this measure might not be ideal for all types of plants.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Removing_dead_leaves\"><\/span><strong>Removing dead leaves<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Another important step is considering that this insect feeds on <strong>decomposing organic matter<\/strong>. So, if dead leaves remain on the substrate, they provide food for the gnats and encourage their development.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Using_vermiculite\"><\/span><strong>Using vermiculite<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Another helpful action is covering the substrate surface with a natural amendment such as <a href=\"https:\/\/www.gbthegreenbrand.com\/vermiculite\/1890-vermiculite-nr2-7l-and-100l.html\">vermiculite<\/a>. This prevents gnats from laying new eggs and hatching existing ones in the soil. Simply spread <strong>a layer about 3 centimeters thick.<\/strong><\/p>\n\n\n<p>[ppgbo products=&#8221;1890,6558&#8243; language=\u201den\u201d]<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Phototropic_Traps\"><\/span><strong>Phototropic Traps<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>This type of trap consists of adhesive strips with a bright color, usually yellow, that attract insects, causing them to stick to the surface. They are not effective in completely eradicating the infestation since the problem is concentrated in the substrate. However, they help reduce the number of flies and allow for accurate identification of the insect responsible for the issue.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Potassium_Soap\"><\/span><strong>Potassium Soap<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Potassium soap is one of the most commonly used products in cultivation for controlling certain pests such as aphids, whiteflies, and fungi like powdery mildew, sooty mold, or fungus gnats. Additionally, it provides an extra dose of potassium to the plant. In this case, the product is applied through irrigation water. If the leaves are also developing fungal infections, the use of a fungicide should be considered.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"450\" src=\"https:\/\/www.growbarato.net\/blog\/wp-content\/uploads\/2024\/12\/mosca-del-sustrato-3.jpg\" alt=\"\" class=\"wp-image-183229\" srcset=\"https:\/\/www.gbthegreenbrand.com\/blog\/wp-content\/uploads\/2024\/12\/mosca-del-sustrato-3.jpg 1000w, https:\/\/www.gbthegreenbrand.com\/blog\/wp-content\/uploads\/2024\/12\/mosca-del-sustrato-3-300x135.jpg 300w, https:\/\/www.gbthegreenbrand.com\/blog\/wp-content\/uploads\/2024\/12\/mosca-del-sustrato-3-768x346.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Neem_oil\"><\/span><strong>Neem oil<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><a href=\"https:\/\/www.gbthegreenbrand.com\/boom-nutrients-insecticides\/5296-neem-boom.html\">Neem oil<\/a> is an eco-friendly insecticide widely used worldwide for its effectiveness. It is derived from the fruit and seeds of the neem tree, native to India. The active ingredient in this substance <strong>is a toxic compound called azadirachtin<\/strong>, which works both by contact and ingestion during the larval stage.<\/p>\n\n\n<p>[ppgbo products=&#8221;5296,3347&#8243; language=\u201den\u201d]<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Using_nematodes\"><\/span>Using nematodes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Nematodes are microscopic worms that are sold in a special powder form to be mixed with irrigation water. These nematodes attack larvae to parasitize and feed on them. As this is a biological solution, i.e. it uses living organisms, it is necessary to ensure that they have the optimum conditions for them to live. Thus, the soil must be somewhat moist at the time of pouring the nematodes.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Diatomaceous_earth\"><\/span>Diatomaceous earth&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Diatomaceous earth is a powerful natural remedy against fungus gnats. Made from fossilized microalgae, its sharp particles damage insects&#8217; protective layers, causing dehydration and death. It only targets adult flies on the surface, not larvae underground. For best results, combine it with other methods like potassium soap.<\/p>\n\n\n<p>[ppgbo products=\u201c7457,1855\u201d language=\u201den\u201d]<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Replacing_the_substrate\"><\/span><strong>Replacing the substrate<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>This is the most drastic solution and <strong>should only be used if the situation is severe.<\/strong> It involves tackling the problem at its root\u2014literally. The downside is that changing the substrate can stress the plant, and there\u2019s no guarantee that eggs or larvae won\u2019t remain, so it\u2019s still necessary to combine this method with others for complete effectiveness.<\/p>\n\n\n\n<p>These are some remedies to combat a fungus gnat infestation, but prevention is always best. This means maintaining <strong>proper humidity levels and avoiding overwatering<\/strong>, allowing the top layer of the substrate to dry completely, as mentioned at the beginning of the post. Vermiculite can also be used anytime to prevent these infestations.<\/p>\n<div style='text-align:center' class='yasr-auto-insert-visitor'><\/div>","protected":false},"excerpt":{"rendered":"<p>When we think about pests that affect our plants, we usually associate them with the warmer months when bugs tend to appear. However, we shouldn&#8217;t let our guard down during the colder months because some insects emerge when temperatures drop. One of these insects is the fungus gnat, which can silently ruin a crop. What\u2026 <span class=\"leermas\" onclick=\"window.location.href='https:\/\/www.gbthegreenbrand.com\/blog\/the-best-natural-remedies-to-combat-the-fungus-gnat\/'\">Continue reading<\/span ><\/p>\n","protected":false},"author":18,"featured_media":183236,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wprm-recipe-roundup-name":"","wprm-recipe-roundup-description":"","yasr_overall_rating":0,"yasr_post_is_review":"","yasr_auto_insert_disabled":"","yasr_review_type":"","footnotes":""},"categories":[254],"tags":[],"class_list":["post-197102","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-marijuana-crops"],"yasr_visitor_votes":{"stars_attributes":{"read_only":false,"span_bottom":false},"number_of_votes":4,"sum_votes":19},"_links":{"self":[{"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/posts\/197102","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/comments?post=197102"}],"version-history":[{"count":2,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/posts\/197102\/revisions"}],"predecessor-version":[{"id":197105,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/posts\/197102\/revisions\/197105"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/media\/183236"}],"wp:attachment":[{"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/media?parent=197102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/categories?post=197102"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/tags?post=197102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}