The mandarin tree in our back yard seems to have holes in some of the trunk down low
Some evidence in old city areas Really keen to save treat as it’s a magnificent old tree
Thank you for contacting Yates.
Looks like the tree might be suffering from rot, which is common for matured citrus tree. You may look into
Click here for more info on this product: https://www.yates.com.au/product/garden-disease-control/yates-anti-rot-phosacid-systemic-fungicide
Hope this helps and happy gardening.
Answered: 20 Aug, 2021