Why does my lemon tree have bugs and the leavs are turning yellow?
I planted my first lemon tree around 6 months ago, fed with seaweed solution and was getting new growth and flowers. 5 weeks ago I noticed tiny black things on the leaves. I sprayed with a soapy solution once a week at dusk and hand wiped each leaf. After going away for a couple of days I've found that the leaves have turned yellow and are falling off, the most recent new growth has died (found and removed a caterpiller near that) but there are still buds on it and the stems are green..... it is possible that a little boy may have wee'd on the tree - I don't know what to do now to help it grow???
There are a number of pests that can attack lemon trees. I think what you have seen congregated around the flowers are aphids. They are sap sucking insects which can cause considerable damage. The products we would recommend for you to use to control this pest are PestOil or Yates Nature's Way Vegie & Herb Spray Concentrate. To ensure that your tree remains healthy, apply a fertiliser that has been specifically formulated for citrus trees. This fertiliser should be applied in Spring and Autumn. You might like to apply Yates Thrive Natural Citrus & Fruit Pelletised Plant Food. It's enriched with Dynamic Lifter and has added nitrogen, phosphorus and potassium to give your fruiting plants the right balance of nutrients for their growing needs. Regular deep watering, particularly during the hot summer months will also benefit the tree. I am sure your tree will respond to this treatment and will give you lots of juicy fruit.
Answered: 5 Jan, 2011