{"id":416,"date":"2011-09-01T13:53:00","date_gmt":"2011-09-01T12:53:00","guid":{"rendered":"http:\/\/gsu.eventmedialabs.com\/?p=416"},"modified":"2015-06-04T15:49:16","modified_gmt":"2015-06-04T14:49:16","slug":"wednesday-wigglers-red-spider-mite","status":"publish","type":"post","link":"https:\/\/greensideup.ie\/wednesday-wigglers-red-spider-mite\/","title":{"rendered":"Wednesday Wigglers ~ Red Spider Mite"},"content":{"rendered":"

Yesterday we discovered the dreaded red spider mite in the community garden polytunnel. After the initial surprise, the questions flowed:<\/p>\n

\"Red<\/a>

Red Spider Mite<\/p><\/div>\n

How Do You Know it is Red<\/span> Spid<\/span>er<\/span> Mite?<\/span><\/h2>\n

Initially we noticed a pale mottling on the surface of the leaves of plants, namely aubergines in this case (which the mites have a particular taste for).<\/p>\n

As you peer closer, particularly if you have a heavy infestation as we had, you may notice webs speckled with tiny flakes of dust. As you look closer still you’ll notice that the dust moves and isn’t dust at all, but the tiny mites (they’re less than 1 mm long).<\/p>\n

\"Red<\/a><\/h2>\n

What Do Red Spider Mites Do?<\/h2>\n

Red spider mites are sap-feeders which means they have a toxic saliva that results in the leaves discolouring. In the case of glasshouse mites, initially the leaves become a dull green but then increasingly a yellowish-white. Eventually leaves can dry up and fall off.<\/p>\n

The mottled leaves can resemble a mineral deficiency so if you notice any discolouration in leaves they will always call for further investigation.<\/p>\n

\"Red<\/a><\/h2>\n

So Red Spider Mites aren’t Red Then?<\/h2>\n

Red spider mites only turn an orange-red in the autumn and winter months when the adult female\u00a0hibernates. Until then they are yellowish-green in colour, so no, they’re not the little red spiders that you often see scurrying across paths and brickwork.<\/p>\n

Will Red Spider Mites attack everything?<\/h2>\n

They have a varied diet, are fond of a range of plants in a greenhouse, polytunnel or even indoors. In dry summers they will also feed on strawberries, currents and beans as well as other outdoor plants.<\/p>\n

How did we get them?<\/strong><\/p>\n

As they’re so easy to miss because of their size the likelihood is that they were brought if from another garden\/polytunnel with an infestation.<\/p>\n

One of the lovely things about gardening is swapping plants but unless you can be absolutely sure they were grown in a pest free environment, be cautious. Always clean and disinfect pots and containers every year before sowing as they can harbour pests, and of course – be vigilant.<\/p>\n

I hadn’t been to the community garden over the summer holiday weeks, only returning last week for a tidy and catch up and unless you’ve seen an infestation before, it’s very easy to miss.<\/p>\n

\"Red<\/a><\/strong><\/p>\n

What do we do? How do we get rid of them?<\/strong><\/p>\n

Undercover in warm, dry conditions they breed rapidly so regularly hosing down in greenhouses, etc will help to raise the humidity and give some control. They can over winter though so once you’ve identified you have them, you need to eradicate them before they start to breed again in the spring time.<\/p>\n

If you’re gardening without the use of pesticides as we are in the community garden, then biological control is likely to be the most effective method of ridding them.<\/p>\n

This means we will be introducing predatory mites Phytoseiulus Persiliis<\/a>\u00a0<\/i>into the polytunnel in the hope that they will target and attack the Red Spider Mites.<\/p>\n

If the infestation isn’t too severe\u00a0insecticidal soaps<\/a>\u00a0can work too.<\/p>\n

In the meantime, we’ve removed all the aubergines from the polytunnel and away from the garden entirely as they were heavily infected and we’re keeping a very close eye on the cucumbers that are in the next bed.<\/p>\n

We’ll all be looking very closely at our own gardens and polytunnels\/greenhouses too and hoping that they didn’t hitch a ride home on any of our clothing.<\/p>\n

[print_link]<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Red Spider Mites can be difficult to control but identification is the first step.<\/p>\n","protected":false},"author":2,"featured_media":6891,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[563],"tags":[531,935,395],"jetpack_publicize_connections":[],"yoast_head":"\nWednesday Wigglers ~ Red Spider Mite<\/title>\n<meta name=\"description\" content=\"Red Spider Mites can be difficult to control but identification is the first step.\" \/>\n<meta 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