emilycrawford, Author at Australian Apple and Pear IPDM - Page 2 of 6

Posts by emilycrawford

published - 9 October 2019
By David Williams (Agriculture Victoria)

Grower Alert for Southern States: ADB and Thrips

Apple dimpling bugs and thrips have been reported in high numbers in Granite Belt orchards in Queensland. The area is suffering from drought and the insects are probably concentrating on fruit trees because there are few other sources of flowers available to them.
Growers in southern orchards should begin monitoring for …
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ADB, apple dimpling bug, grower alert, thrips

Pests

published - 1 October 2019
By Dr Jacqueline Edwards (Plant Pathologist, Agriculture Victoria)

Botryosphaeria

Failed graft union in a young apple tree and Botryosphaeria was diagnosed as the cause (Photo: J Edwards, DJPR)
Many trees and shrubs can be attacked by fungi and bacteria that cause cankers that lead to dieback. Cankers are lesions in the bark of the trunk (stem), branches or twigs and …
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Botryosphaeria, fungi, tree wounds

Diseases

published - 23 September 2019
By David Williams (Agriculture Victoria) and Emily Crawford (Agriculture Victoria)

Cost of Biologicals versus Chemicals

Many growers ask the question: What is the cost per hectare for treatment for a pest such as mites? Are chemicals or biological control agents more expensive?
To answer that question we need to explore what is meant by “expensive”. The initial purchase price for biocontrol agents may be more than …
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beneficials, biocontrols

Beneficials, Useful Tools

published - 18 September 2019
By Emily Crawford (Agriculture Victoria) and Russell Fox (IK Caldwell)

In a dry spring, plan for Powdery

In a dry Spring when spraying for Black Spot is unlikely to occur, it’s important to plan for Powdery Mildew.
Especially in new varieties of apples, more Powdery Mildew is being seen and it tends not to russet as much as in older varieties.
Look out for signs of powdery mildew in …
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pink, powdery mildew

Diseases

published - 10 September 2019
By Dr Stephen Quarrell (University of Tasmania)

Think Pollination

As the 2019 production season draws closer it’s time to think pollination. By now you should already have had or are having discussions with your beekeeper about your pollination requirements for this season including the number of hives, the hive’s strength (number of bees per hive) and their position(s) in …
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bees, pollination

Beneficials, Weeds

published - 3 September 2019
By Jessica Fearnley (NSW DPI) and Emily Crawford (Agriculture Victoria)

Benefits of Cover Cropping

Cover cropping (or vegetation in orchard inter-rows) helps to increase soil organic matter, improve soil structure, combat soil compaction and improve nutrient availability. Cover crops can also support integrated pest management in orchards as they provide pollen (food) and habitat for natural predators and parasitoids. A mixed species inter-row sward …
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beneficial predators, cover crop, inter row, mowing, weeds

Weeds

published - 13 August 2019
By Paul James (Lenswood Co-operative)

Birds, Bats and Other Animal Problems

Australia’s apple and pear growing areas are located in several diverse regions throughout the country. Each of these regions has its own indigenous (and introduced) species of plants, animals and birds. Most of these species are not a problem for orchardists and can often be beneficial but there are several …
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bats, birds, cockatoos, flying fox, kangaroos, lorikeets, netting, noise control devices, rosellas, scaring devices, wallabies

Pests

published - 13 August 2019
By Paul James (Lenswood Co-operative)

Grey Headed Flying Fox moving south

Grey Headed Flying Fox
Fruit growers in northern Australia (Queensland and New South Wales) have had problems with the Grey Headed Flying Fox ((Pteropus poliocephalus) for a long time. Now this native mega bat species continues its movement south and westwards due to habitat issues, drought and competition with the Black …
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flying fox, netting

Pests

published - 1 August 2019
By David Williams (Agriculture Victoria)

How to Calculate Cumulative Leaf Infested Days (CLID’s)

To calculate Cumulative Leaf Infested Days (CLIDs) you need to first monitor weekly or fortnightly using the 10 leaves / tree method and calculate the % of Infested Leaves (click here to download a template Monitoring Sheet).
Here is an example of how to calculate the % of infested leaves:

Sample 5 …
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Cumulative leaf infested days, leaf scorch, mites, monitoring

Pests, Resources

published - 30 July 2019
By Emily Crawford (Agriculture Victoria)

Brush up on good bugs

Beneficial insects and mites may already be in your orchard working to reduce populations of pests. But did you know many are also commercially available in Australia?
If you can identify the beneficials in your orchard you may then be able to make more informed decisions and avoid accidentally wiping out …
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beneficials, good bugs, parasites, parasitoids, predators, predatory mites, predatory wasps

Beneficials, Pests, Resources