Timely application of IWM tactics

Timely application of IWM tactics

Including information on Integrated Weed Management (IWM) can help you increase the strategic value of advice you provide to clients. To assist you to access the latest information on IWM, sections of the draft IWM manual have been placed on the Weeds CRC website for easy reference.

The IWM manual is a 350+ page technical reference document. It provides data on the impact of weed management tactics on the weed seedbank, as well as how tactics can be used in a crop system.

The manual divides weed management tactics into 5 main groups - depending on how they are used to deplete the weed seed bank. Below are links to individual tactics. Click on the hyperlink to go directly to the section within the IWM manual regarding that tactic.

a) Tactic group 1 - Deplete weed seed in the soil seedbank (starts at p2 of link)

This includes

    - Burning residues (p3)

    - Encouraging insect predation of seed (p9)

    - Inversion ploughing (p12)

    - Autumn tickle (p16)

    - Delayed sowing (seeding) (p22)

b) Tactic group 2 - Kill weed seedlings (starts at p26 of link)

        This includes

            - Fallow & pre-sow cultivation (p27)

            - Herbicides (p33)

                    - Knockdown (non-selective) herbicides for fallow & pre sow control (p40)

                    - Double knockdown or 'double knock' (p45)

                    - Pre emergent herbicides (p50)

                    - Selective post-emergent herbicides (p57)

            - Weed control in wide-row cropping (p 66)

                    - Inter-row shielded spraying & crop row band-spraying (p71)

                    - Inter-row cultivation (p 74)

            - Spot spraying, chipping, hand roguing & wiper technology (p77)

            - Biological control agents (p79)

c) Tactic group 3 - stop weed-seed set (starts at p84 of link)

        This includes

           - In-crop weed management for seed set control (p85)

                    - Spray-topping with selective herbicides (p89)

                    - Crop-topping with non-selective herbicides (p93)

                    - Wiper technology (p98)

                    - Crop desiccation and windrowing (p101)

           - Pasture spray-topping (p105)

           - Silage and hay - crops and pastures (p113)

           - Renovating crops and pastures - green & brown manuring, mulching & hay freezing (p119)

           - Grazing - actively managing weeds in pastures (p127)

d) Tactic Group 4 - prevent viable weed seeds being added to the soil seed bank (starts at p132 of link)

        This includes

           - Weed seed collection at harvest (p133)

                    - Narrow header trail (p138)

                    - Chaff cart (p140)

                    - Other options for weed seed collection at harvest (p142)

           - Grazing crop residues (p144)

e) Tactic Group 5 - prevent introduction of viable weed seed from external sources (starts p 147 of link)

        This includes

           - on-farm hygiene (p148)

                    - sow weed-free seed (p149)

                    - manage weeds in non-crop areas (p151)

                    - clean farm machinery and vehicles (p151)

                    - manage livestock feeding and movement (p152)

To download the full document go to: http://www.weeds.crc.org.au/documents/iwm_manual_section4_tactics_200706.pdf (748 kb)

Profiles of common weeds of cropping (472 kb) http://www.weeds.crc.org.au/documents/iwm_manual_section6_profile_200706.pdf

The weeds CRC has available on their website a reference on the ecology and biology of 20 key weeds of cropping. Weeds included are: annual ryegrass, barley grass, barnyard grass, black bindweed, bladder ketmia, brome grass, capeweed, common sowthistle, doublegee, fleabane, Indian hedge mustard, liverseed grass, muskweed, paradoxa grass, silver grass, sweet summer grass, turnip weed, wild oats, wild radish & wireweed.

Excellent text on Herbicide Resistance (440 kb)

http://www.weeds.crc.org.au/documents/iwm_manual_section2_hr_200706.pdf

Also available on the Weeds CRC website is an excellent text on herbicide resistance. Designed for advisers, it answers most common questions.

Cutting edge data on the impact of crop competition (250 kb)

http://www.weeds.crc.org.au/documents/iwm_manual_section3_agronomy_200706.pdf

Increasing crop competition is a primary tool used by advisers waging war on many different herbicide resistant or difficult to manage weeds. This document describes the impact increasing crop competition can have on weed seed set - and the role that crop competition plays in assisting in-crop herbicides to provide excellent results.