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Bianca
Medium_85446979-265e-40bb-a0e6-1aa45009a48d Lemon dwarf tree is dropping leaves and has spots

Since the tree has been repotted, it’s leaves have gone yellow and have been dropping off. Some leaves also have brown spots along the main veins. Could this be an infection or is it a deficiency? It has been watered with light fertiliser.

Submitted: 12:05PM, 05 May 2019
Answer: Hi Brianca,

Thank you for contacting Yates.

The leaves look like it has been affected by sooty mould. Sooty mould 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. I would suggest to spray with’Yates Nature’s Way Citrus & Ornamental Spray (Pyrethrum Plus Oil Pest Spray)’. Controls a wide variety on insects pests on many edibles and ornamentals.
Click here for more info on this product:
http://www.yates.com.au/products/organic-gardening/pest-disease-control/Natures-Way-citrus-and-ornamental-spray/

Meanwhile, it’s worth to add some liquid fertiliser, we recommend applying ‘Yates Dynamic Lifter Liquid Concentrate’ as a gentle fertiliser and soil improver.

Click here for more info on this product:
https://www.yates.com.au/products/fertilising/organic-based/dynamic-lifter-liquid-concentrate/

Hope this helps and happy gardening.

Best Regards,
Louise
Yates Horticulturist

Category: Fruit & Citrus
Answered: 03:53PM, 10 May 2019

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