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MacAlert - December 2021

2021 | Australian Macadamia Society | Manual/guide

Key messages this month include: • Macadamia nut borer (MNB). Monitor for MNB and release MacTrix effectively. • Spotting bugs. Keep monitoring for spotting bug, using late season techniques like drop sheets. • Young tree pests. If you have younger they can be severely affected by pests in summer. • Nutritional demand is increasing as trees need to support developing nuts. • Tree water requirements are generally at their peak and will remain high through to harvest. • With heavy rain expected, large organic matter applications need careful thought. • Storm season is here again and you need to be prepared to minimise impact and deal with any damage. • Have you got all your preparations for the Christmas/New Year period in place? • Benchmarking data collection is underway for the 2021 season. • AusMac2022 is just around the corner, register now.

AMS News Bulletin Summer 2021

2021 | Kojetin L, Smit T, Searle C, Wilkie J, Topp B, Bignell G, Brinkhoff J, Hanan J, Price J, Alam M, Parfitt C, Toegel H, Robson A, Smit A, Camilleri W, Camilleri R, Griffin K, Harris R, Weinert M, Andreoli S, Johnson M | News Bulletin

Play your part in securing our future
Norm Greber Award winners help ensure future of macadamias – on farm and in the wild
The winners of the 2021 AMS Awards of Excellence have been announced
Macadamia harvester modifications improve safety and performance
Case Study 1: Intercropping for soil health and a cash crop
Case Study 2 & 3: Intercropping for soil health and generating mulch (depleted soils)
Why sunlight and regenerative agricultural practices are the key to this macadamia orchard
Weather data essential for orchard management
Mapping mistletoe aids management
Unravelling the mystery of the macadamia family tree
Macadamia ecophysiology enlightening management: Water Management part A
Reinventing chocolate macadamias with plant-forward flavours
Research shows macadamias are the gift worth giving this holiday season
Macadamias take centre stage at live ‘Chill Day’ event in Taiwan
Rejuvenation breathes new life into an old orchard
Field trials to improve orchard systems
Understanding macadamia tree and fruit growth through modelling
Growers have their say on new selections from the breeding program
Forecasting macadamia yield at block and farm level
Decortes Private Regional Variety Trial – Roundup

The benefits of full row tree removal, cover crops and regenerative practices with grower Rex Harris

2021 | Australian Macadamia Society | Video

For the past several years the Harris family’s macadamia farm outside Bangalow on the NSW Far North Coast has been going through a transformation. Rex Harris, his wife Lynette, sons Carl and Daniel, farm manager Mark Jones and agronomist Ray O’Grady have all collaborated to convert the orchard from a monoculture to a polyculture farm. This includes practices such as tree removal, planting cover crops, composting and many more learnings. In this video Rex explains how they did it.

MacAlert - November 2021

2021 | Australian Macadamia Society | Manual/guide

Key messages this month include: • Nut shed is a normal part of the crop cycle. • Continue to monitor for pests such as: o Macadamia nut borer eggs, which signal the start of flights into orchards. o Spotting bug damage at least weekly and preferably twice weekly in warmer regions. o Macadamia seed weevil infestation in shed nuts. • Nutritional demand is increasing as trees need to support both new flush and developing nuts. • Monitor soil conditions and, if your orchard is irrigated, avoid stress-induced nut drop by keeping trees well-irrigated. • Orchards don’t need to look like golf courses. There are many benefits to letting grass and other ground cover grow. • The potential for damage from hail, wind, excessive rain or flooding caused by intense storms is increasing. • Benchmarking data collection is starting now for the 2021 season. • Register for MacGroups which are to be held in November and the beginning of December. • AusMac2022 is just around the corner.

Environmental effects on flower blight pathogens

2021 | Akinsanmi F, Prassannath K, Galea VJ | Article

Flower blights (grey mould, green mould and dry flower) are important diseases of macadamia. Lack of information on pathogen biology and disease epidemiology in macadamia has hampered control options. Effects of climatic variables including temperature, relative humidity (RH) and vapour pressure deficit (VPD) on the abundance, germination and growth of conidia of four fungal pathogens that cause various flower blights in macadamia were studied.

Benefits of double ground wood chip (August 2021 MacGroup)

2021 | Australian Macadamia Society | Video

Alloway Macadamias farm manager Johan Oosthuizen and Macadamias Australia Grower Liasion Rohan Orford show how horizontal grinding is assisting to produce a high quality double ground wood mulch from trees being removed in high density orchards. The horizontal grinding process helps to control mulch particle size and the resultant wood strands form a much better orchard floor surface and root growing environment than traditional wood chip from a tub grinder.

AMS News Bulletin Autumn 2021

2021 | Kojetin L, Hill S, Bond D, Smit T, Currey A, Bright J, Jones K, Searle C, Akinsanmi F, McConachie I, Price J, Smit A, Elley S, Smit M, Fuss E, Jarvis C, Marshall D, Rogers R | News Bulletin

Australian industry proves resilient after challenging 12 months
Three years on shows the benefit of careful planning and flexibility
Harnessing technology creates new opportunities at Dungarubba
Floodplain macadamias: learning what works (and doesn't)
Developing macadamia on floodplain soils
Update on Clean Coastal Catchments
You can't put icing on a cake when there's no cake
Harvest efficiency a key to success for Red Rock Macadamias
Tree resilience is essential to high performing orchards
Cooperative approach essential to managing feral pigs
How a hobby turned into a full time business
Hard learnt lessons about feral pigs
Am I reading this right? Climate information and interpretation in a La Nina year
Macadamia ecophysiology enlightening management: Part 1
Innovative mulcher protects groundcover on steep slopes
The top 20 of 2020: the years' most inspiring macadamia products
Phytophthora disease control with phosphonates and holistic strategies in macadamia
Carbon sequestration by macadamias: a review of past research
Collection underway for the Wild Macadamia Arboretum

MacAlert - October 2021

2021 | Australian Macadamia Society | Manual/guide

Key messages this month include: Continue to monitor for pest and diseases. Husk spot, If your orchard has a history of husk spot and/or has susceptible cultivars you will need to be ready to apply fungicide as nutlets reach match-head size Macadamia seed weevil (MSW), The female seed weevils lays its eggs between the husk and developing nut. Spotting bug, Early in the season look for damage on nutlets as they reach pea size. Nutritional demand. If you are unsure of how trees are progressing nutritionally, spring is a good time to sample leaves after flowering and before they flush. Organic matter should be on the orchard floor and orchard prunings moved back under trees as soon as possible Water demand. Water requirements will marked increase in October and remain high until March. Mechanical, Keep sprayer and spray tractor maintenance as breakdowns during this period can be costly.

Novel technologies and practices for the optimisation of pollination within protected cropping environments (ST19000)

2021 | Hort Innovation | Research report/Update

Using a multifaceted approach, this program will focus on the productivity and quality of pollination in protected cropping environments. The aim is to understand the current impediments to adequate pollination, then improve these systems through the use of advanced technology.

MacAlert - September 2021

2021 | Australian Macadamia Society | Manual/guide

Key messages this month include: • Continue to monitor at least twice per week for pest and diseases that affect flowers. • Lace bug, flower caterpillar and flower diseases such as Botrytis and Cladosporium are more prevalent in some regions. Monitor weather conditions and known hotspots within the orchard. • Discuss control options with your pest consultant or grower liaison officer to select strategies and application timings that will have minimal impact on beneficials such as bees. • Communicate with your beekeeper on stocking rates and hive positions to develop a plan that provides flexibility for you both, and crucially, keeps bees safe. • Tree water demand is increasing with the warmer weather • Discuss tree nutritional demand and spring soil and leaf sampling with your consultant • After mulching remaining nuts to reduce the risk of rats and kernel grubs, consider reduced mowing strategies to allow grass and other inter-row species to flower.

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This website has been partly funded by Hort Innovation, using the macadamia research and development levy and contributions from the Australian Government.