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Cucumber plant problem

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  • 20-08-2010 11:13am
    #1
    Yorky
    Registered Users Posts: 1,485 ✭✭✭


    I transplanted some cucumber plants growing in pots to the greenhouse border recently but the leaves have started to turn yellow and brown.

    The soil had been manured last Autumn and more manure was incorporated when transplanting.

    They've been well watered (every other day), fed weekly and given a seaweed tonic to no avail.

    I've attached some photographs.

    Thanks in advance for any diagnosis and / or advice


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    #2
    Corsendonk
    Closed Accounts Posts: 3,871 ✭✭✭Corsendonk


    Ouch Ouch!

    Notice the webs and little red fellows on your cucumbers in the first 2 photos. You have a very nasty outbreak of red spider mites. They usually attack the head and work there way down the plant. They sap the strength of your plants slowing turning the plant to straw. They can lay there eggs in your greenhouse frame so very hard to get rid of the buggers even with a good insecticide. Biological controls can work to limit them but the predators dont like the glare of the sun too much so they hang around the bottom and middle of the plants. Sometimes misting the plant head with a fine mist of water everyday can slow them down. Any idea how they got into your greenhouse?



    http://apps.rhs.org.uk/advicesearch/profile.aspx?PID=190


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