BCG Herbicide trials
This project continues previous trials for managing herbicide resistant ryegrass. Long-term crop rotations in combinations of herbicide usage and alternative strategies such as chaff carts, will be investigated over three years. This work is being undertaken in co-operation with Hart (SA).
The resistant ryegrass site is located on Ian McClelland’s property near Culgoa.
Trials 2008
|
Trial name: |
Rotation trial (RR1) | |
|
Aim: |
To investigate whether it is possible to reduce ryegrass numbers on a paddock with known resistance without relying on in-crop grass selectives herbicides. | |
|
Treatments: |
Year 1 - Lentils, medic, oaten hay (sown to whole block – not replicated) | |
| Year 2 - Wheat (replicated) | ||
| Year 3 - Barley (replicated) | ||
|
Chemicals used: |
Year 1 |
Lentils – Roundup 1.5L/ha (pre-sow), simazine 0.6L/ha + Lexone 130g/ha PSPE#; gramoxone 1L/ha crop top Medic – Roundup 1.5L/ha early October, gramoxone if regrowth Hay – Roundup 1.5L/ha pre-sow, diuron 1.2L/ha PSPE |
|
Years 2 & 3 |
1. Control (no herbicides) 2. TriflurX 1.5L/ha IBS* 3. TriflurX 3.0L/ha IBS 4. TriflurX 1.5L/ha IBS + chaff cart at harvest 5. Chaff cart |
|
Plots sprayed with herbicide resistance boom and sown using the Avon Richardson seeder with presswheels (no-till).
# PSPE = Post-sowing pre-emergent
* IBS = Incorporated by sowing
|
Trial name: |
Trifluralin and mixes with inter-row sowing (RR2) |
|
Aim: |
To investigate whether trifluralin and mixes can be used with a high degree of crop safety and good rye control with no-till inter-row sowing. |
|
Treatments: |
2006 Yitpi wheat sown with Walpeup seeder (12-inch spacings), TriflurX 1.6L/ha IBS |
| 2007 Wyalkatchem wheat sown with Walpeup seeder per inter-row / slashed / burnt stubble | |
| 2008 SloopVic barley sown using the Avon Richardson seeder | |
|
2008 treatments: |
1. TriflurX 2L/ha IBS |
|
Trial name: |
Dry and wet sowing pre-emergent herbicides (RR3) |
|
Aim: |
To compare the effectiveness of pre-emergent herbicides for the control of ryegrass under different sowing conditions. |
|
Treatments: |
1. Control 2. TriflurX (1.5L/ha IBS) 3. TriflurX (3.0L/ha IBS) 4. TriflurX (1.5L/ha) + Dual Gold (0.5L/ha) IBS 5. TriflurX (1.5L/ha) + Avadex Xtra (1.6L/ha) + Dual Gold (0.5L/ha) IBS 6. TriflurX (1.5L/ha) + Avadex Xtra (1.6L/ha) IBS 7. TriflurX (1.5L/ha) + Lexone (180g/ha) IBS 8. BAY191 (166g/ha) IBS 9. Boxergold 2.5L/ha IBS |