Disease

Control of Crown Gall disease

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The control of Crown Gall by another organism is a great IPM story, and an Australian discovery now used worldwide. Crown Gall Disease is caused by the organism Agrobacterium tumefaciens (updated scientific name: Rhizobium radiobacter). It causes tumours and cancer-like growths on lower stems and roots. It was a particularly…

Harnessing beneficial microbes to suppress brown rot and Botrytis

I have worked on biological control agents for controlling crop diseases since 1992, mostly by using a group of fungi called Trichoderma spp., which are natural predators of other fungi.  There have been quite a lot of attempts to control crop diseases using biological controls, most of which have not…

Protect your crop against Crown Gall disease

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Have your plants been affected in the past by Crown Gall Disease?

Lime sulphur back in vogue

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Stoller Australia is known for its complete range of liquid nutrients and specialty treatments. Stoller also supplies some fungicides and after successful programs on trees in 2011 there is a lot of interest in treating trees at late dormancy with Stoller’s Lime Sulphur.

What is pear decline?

Pear decline was originally described as a virus-like agent. It was later determined to be a mycoplasma-like organism that has recently been renamed as a phytoplasma.

Controlling cherry rots in the orchard (part2)

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(cont from last month) Infection cycle of major fruit rotting fungi Brown Rot Infections can remain dormant and symptomless until fruit begin to ripen. Such infections are termed ‘latent’ infections. Grey Mould Botrytis rot of mature cherries may be mistaken for brown rot as the symptoms are very similar. Fruit…

Big future for fungicides

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First developed by Syngenta 15 year ago, azoxystrobin is the active ingredient in Amistar®, which provides plants protection against a range of damaging diseases. Amistar plays a critical role in responding to growing international food demand by increasing the yield and quality of grain, vegetable and fruit crops around the…

Controlling cherry rots in the orchard (part3)

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Why do fruit rots develop?(continued from last month) NutritionNitrogen, potassium and calcium are the minerals most often associated with disease severity. Excess nitrogen results in softer fruit (more easily penetrated by germinating spores) and excessive tree vigour (high humidity within the tree canopy).

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