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Wendy
Medium_img_8377 Some of the leaves of my lime tree are becoming yellowing and some have black spots. What should I do?

Some are yellow, some are yellow with black spots. Some small limes have started to form.

Submitted: 02:28PM, 06 Aug 2016
Answer: Hi Wendy,

Thank you for contacting us regarding your lime tree, the black blotch looks like sooty mould, which is caused by sap-sucking insects such as aphid, scale or mealy bugs. The insects secrete a sugary substance that goes black with mould over time, hence its name. You may notice there are ants around, as they are also after the sugary substance. Once you control the aphids or scale, the black sooty mould will disappear over time or you can wash off with soapy water. To control sap-sucking insects, try Yates Nature’s Way Citrus & Ornamental Spray. Click here for more info: http://www.yates.com.au/products/organic-gardening/pest-disease-control/Natures-Way-citrus-and-ornamental-spray/.

You will also need to feed your tree with some complete fertiliser such as Dynamic lifter organic plant food for the yellowing leaves. This fertiliser is a manure based organic fertiliser, and will provide all the nutrients (nitrogen, potassium and phosphorus) for your plants need to grow and thrive.

Hope this helps and happy gardening.

Best Regards,
Louise
Yates Horticulturalist

Answered: 03:13PM, 06 Aug 2016

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