Category Archives: Garden Pests, Diseases & Problems

Citrus Nutrient Deficiency – Yellow Leaves

If leaves are yellowing on a citrus tree, it may be a sign of nutrient deficiency, but it may not be, depending on which leaves are yellowing. Older leaves yellowing are quite normal as long as it’s only happening to … Continue reading

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Citrus Problems – Why Is My Citrus Tree Dying?

Why do apparently healthy looking citrus trees suddenly start deteriorating in a matter of days, with leaves curling then dropping, branches dying back, eventually resulting in the loss of the tree? There are several causes, often caused by common gardening … Continue reading

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Horticultural Glues and Tree Banding Trees to Controls Ants and Other Pests

Glue-banding of tree trunks is an effective technique for controlling various pests of fruit trees. A waterproof band covered in horticultural glue, an aggressive long-lasting adhesive, is wrapped around the trunk of the tree to create a sticky barrier which … Continue reading

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Apple Tree Diseases – Crown Gall

Crown gall is a bacterial disease caused by Agrobacterium tumefaciens (syn. Rhizobium radiobacter), which produces tumour-like swellings on the bark of trees and plants. It can infect a wide range of dicotyledonous (broad-leaved) plants, particularly members of the Rosaceae (rose) … Continue reading

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Organic Control of Curl Grubs in Lawn

Curl Grub larvae (credits – CSIRO Australia scienceimage) If you’ve ever been digging in the garden and discovered plump, pale coloured grubs beneath the soil that curl up into a “C” shape when disturbed, these are Curl Grubs. Curl grubs … Continue reading

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Citrus Fruit Splitting and Prevention

Various cultivars of Navel and Valencia oranges, mandarins and mandarin hybrids are prone to fruit splitting, a pre-harvest physiological rind disorder. Gardeners often wonder if this phenomenon is caused by a nutrient deficiency. Actually, there’s another cause, but plant nutrition … Continue reading

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Apple Tree Diseases and Planting Location

Apple trees branches covered in patches of white, woolly fuzz? What you’re seeing is a  woolly aphid infestation . These pests can be controlled by spraying a few applications of horticultural oil spray (preferably a natural oil based product rather … Continue reading

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