Citrus are prone to a few pests and diseases, so be vigilant. Look out for citrus leafminer, which causes distortion in the new growth. It can only be sprayed with an oil spray (white oil and pest oil) during the growing season, from late spring through to autumn – the spray makes the leaf surface slippery and undesirable. The spray is an organic method of control and also deters aphids (which attack new growth), bronze orange bug (also known as stink bugs) and scale insects.
Sooty mould is a black substance that looks just like soot, which grows on the honeydew excreted from scales and aphids. Sooty mould can become so thick that it actually stops leaves from photosynthesising properly. Treatment is two-fold: first treat the scales or aphids to stop the production of honeydew, and then physically remove the mould from the leaves by coating with soapy water and hosing leaves clean.
KEEP IT CLEAR
Avoid piling up grass clippings and weeds around the trunk of your citrus tree, as any build-up and lack of air circulation can cause collar rot. Also, never dig over the surface area of the soil around your citrus, as the plant has surface roots which can easily be damaged.
No more bugs Using organic methods for pest control will deter bugs and keep your plants healthy.