{"id":16314,"date":"2014-06-16T17:00:39","date_gmt":"2014-06-16T17:00:39","guid":{"rendered":"https:\/\/blog.theenduringgardener.com\/?page_id=16314"},"modified":"2017-02-07T15:33:04","modified_gmt":"2017-02-07T15:33:04","slug":"keep-it-clean-keeping-beasties-at-bay-in-the-greenhouse","status":"publish","type":"page","link":"https:\/\/blog.theenduringgardener.com\/greenhouses\/keep-it-clean-keeping-beasties-at-bay-in-the-greenhouse\/","title":{"rendered":"Keep it Clean \u2013 Keeping Beasties at Bay in the Greenhouse"},"content":{"rendered":"<p>It\u2019s not just plants that appreciate the protection of a greenhouse \u2013 before long less welcome living things will inevitably take up residence too. In general pests aren\u2019t too much of a problem in small numbers, but once they\u2019ve made themselves comfortable and set up home, they soon move on to raising a family \u2013 and that\u2019s where the problems begin.<br \/>\nIf, like me, you prefer to avoid going down the chemical pesticide route, there\u2019s a wealth of environmentally friendly solutions that are becoming increasingly mainstream as commercial growers adopt methods of pest control that don\u2019t poison the soil, or result in pests that are resistant to the chemicals.<\/p>\n<div class=\"drop-greenhouse lifted\">\n<p><strong>Prevention<\/strong><\/p>\n<ul>\n<li>Of course prevention is better than cure and there are various things you can do to keep problems at bay.<\/li>\n<li>Give the greenhouse a thorough cleanout when it is at its emptiest in autumn<\/li>\n<li>declutter and (after cleaning) only return the things that belong in the greenhouse e.g. plants, potting compost and a selection of pots and seed trays<\/li>\n<li>brush down the benches and shelves and window frames<br \/>\nclean the windows inside and out<\/li>\n<li>wipe all the hard surfaces with a greenhouse disinfectant \u2013citrus-based <a href=\"https:\/\/blog.theenduringgardener.com\/keep-it-clean\/\" target=\"_blank\">Citrox<\/a> is effective and environmentally friendly<\/li>\n<li>use a <a href=\"https:\/\/blog.theenduringgardener.com\/stink-bomb\/\" target=\"_blank\">garlic smoke bomb<\/a> to fumigate the greenhouse overnight \u2013 shut windows, doors and vents to get the maximum effect and avoid fumigating the neighbours!<\/li>\n<li>bought-in plants often arrive with resident pests \u2013 don\u2019t be embarrassed about checking them carefully and (gently) knocking them out of their pots to make sure they are healthy before you buy; vine weevil is particularly partial to hitching a ride to a new location<\/li>\n<li>if practical, quarantine new plants for a couple of weeks before bringing them into the greenhouse \u2013 especially plants that are likely to stay in the greenhouse for a long period \u2013 that way you can deal with pests before they are brought indoors<\/li>\n<li>the old-fashioned sticky traps are a useful indicator of the arrival of whitefly, leafminers and greenfly; see them and you know it\u2019s time to act; hang them where they won\u2019t get stuck in your hair (this is from personal experience)<\/li>\n<li>keep the atmosphere in the greenhouse humid to deter red spider mite \u2013 water the path and the evaporation will cool the atmosphere \u2013 do this regularly, especially in hot weather<\/li>\n<\/ul>\n<\/div>\n<div class=\"drop-greenhouse lifted\">\n<p><strong>Cure<\/strong><\/p>\n<p>Once the pests have arrived it is important to stop them gaining the upperhand. These controls consist of various strategies from traps, to sprays to natural predators.<\/p>\n<p><strong>Traps<\/strong><\/p>\n<ul>\n<li>yellow sticky traps catch whitefly, aphids, thrip, sciarid fly, leafminer, leaf hopper<\/li>\n<li>blue sticky traps catch thrip, adult leaf miners and moths<\/li>\n<li>White traps for fungus gnats around the base of a crop<\/li>\n<\/ul>\n<p><strong>Natural Pesticide Spray<\/strong><\/p>\n<p>This needs to be used carefully because it can kill the goodies as well as the baddies, so is best used in the evening when the bees and other beneficial insects are less likely to be around.<\/p>\n<ul>\n<li>Insecticidal soap is fatty acid based and leaves no harmful residues so any beneficial insects that visit the plants won\u2019t be harmed. It works on contact so it can be useful for reducing infestations of whitefly, aphids and mealybug.<\/li>\n<\/ul>\n<p><strong>Natural Predators<\/strong><\/p>\n<p>These creatures prey on the pest by either parasitizing them or eating them. They are invaluable to the greenhouse owner. It is essential that the pest is present in the greenhouse in moderate numbers at the time of introduction and that the temperature is within a certain range. Each of these biological controls is specific to a particular pest, although the Mighty Mite Macrocheles robustulus deals with soil borne pests, maggots, woodlice and vine weevil larvae.<\/p>\n<ul>\n<li>Whitefly is controlled by the introduction of the parasitic wasp Encarsia Formosa<\/li>\n<li>Spider mite is controlled using predatory mites Phytoseiulus persimilis<\/li>\n<li>Mealybug can be dealt with by the predatory ladybird Cryptolaemus montrouzieri<\/li>\n<li><a href=\"https:\/\/blog.theenduringgardener.com\/its-nearly-time-to-go-undercover\/\" target=\"_blank\">Scale insect<\/a> can be incredibly difficult to get rid of, but predatory ladybird Chilocorus nigritus likes to eat them which is very good news<\/li>\n<li>Vine Weevils are fiendish \u2013 you may not know they are present until plants start collapsing &#8211; control them with the vine weevil nematode<\/li>\n<\/ul>\n<\/div>\n<hr \/>\n<p>My thanks to Julian Ives of <a href=\"http:\/\/www.dragonfli.co.uk\/\" target=\"_blank\">dragonfli<\/a> for up to date information on pest control in the greenhouse. His website contains more detailed information to help you choose the right solution to your problem. From time to time I will update this section as new pests arrive and their predators are discovered. I\u2019m about to test a trap to deal with Tuta absoluta, the tomato moth, which made serious inroads into my greenhouse crop last summer.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>It\u2019s not just plants that appreciate the protection of a greenhouse \u2013 before long less welcome living things will inevitably take up residence too <\/p>\n","protected":false},"author":2,"featured_media":3113,"parent":15010,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-16314","page","type-page","status-publish","has-post-thumbnail","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/blog.theenduringgardener.com\/wp-json\/wp\/v2\/pages\/16314","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.theenduringgardener.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blog.theenduringgardener.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blog.theenduringgardener.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.theenduringgardener.com\/wp-json\/wp\/v2\/comments?post=16314"}],"version-history":[{"count":1,"href":"https:\/\/blog.theenduringgardener.com\/wp-json\/wp\/v2\/pages\/16314\/revisions"}],"predecessor-version":[{"id":21310,"href":"https:\/\/blog.theenduringgardener.com\/wp-json\/wp\/v2\/pages\/16314\/revisions\/21310"}],"up":[{"embeddable":true,"href":"https:\/\/blog.theenduringgardener.com\/wp-json\/wp\/v2\/pages\/15010"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.theenduringgardener.com\/wp-json\/wp\/v2\/media\/3113"}],"wp:attachment":[{"href":"https:\/\/blog.theenduringgardener.com\/wp-json\/wp\/v2\/media?parent=16314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}