AGRODEX CAB - Calcium, Nitrogen & Boron commercial fertilser


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High uptake calcium and nitrogen plus Boron with organic & amino acids. Calcium base with the addition of a specialised organic acid which bonds (chelates) with the calcium resulting in excellent uptake and mobilisation. AgroDex CaB has highly available naturally complexed elements, formulated to rapidly correct and prevention of calcium deficiencies in a wide variety of crops and soils. AgroDex CaB is formulated with boron for improved results.

non-returnable IBC's

Sunburn Damage in Olive Trees


Sunburn Damage in Olive Trees


I have a couple of olive trees with a bark problem.  This particular tree is a bit stressed from lace bug I believe, I'm not sure they've had their full care for the last couple of years due to the transition. It needs a bit of a prune too which I will take care of before I spray it. But will wait for your comments first.  See image below.

About Sunburn Damage

Sunburn can occur in olive trees as damage to bark, foliage, fruit which is caused by excessive solar radiation exposure and seriously affect growth.

Sunburn can cause the tree the olive tree to be more susceptible to borers.  Olive trees affected by sunburn are typically poor in health and if severe enough can result in premature death.

Sunburn in olive trees is usually associated with warm weather coupled with water deficit.

Although olive trees are well adapted to hot and dry conditions, too much heat can result in lower yields, leaf wilt, and reduced photosynthesis as the olive tree shuts down critical functions to respond to heat stress.

Older trees can be damaged when the bark is newly exposed to the sun because of pruning or premature leaf drop. Heavy pruning of olive trees can lead to increase reflected light or radiate heat around established trees can also lead to sunburn.


Sunburn to trunks can leave the tissue dried, cracked and sunken and the bark may peel away leaving the wood susceptible for borer attack or fungal infections to enter the bark for further damage to the exposed hardwood underneath.

Foliage may be brown and necrosis begins at leaf tips, margins and between veins. 

Heat stress usually results in fruit drop if an olive crop is present.


Encourage good soil health and moisture-holding capacity.  Encourage branch structure with proper pruning and plant training.  Retain branches that will help to shade the trunk and be beneficial for cropping.

Give trees adequate irrigation to reduce stress and do not overwater trees.

For olive trees and fruit to reduce the risk of sunburn use Kaolin clay applied as a foliar film to help offer protection in reducing heat stress and intense solar radiation.

Whitewashing trunks may help prevent sunburn which is usually seen as an application of rubberised tree sealant.  Sometimes water-based paints are used.

If leaves have not already been killed, sunburn injury to foliage can often be remedied by adequate irrigation, adding shade or shelter, and improving soil conditions.

Sunburn Olive Tree

Bark has been affected by intense sun radiation exposure and also water deficit.