P.I.S.A.
Seed Treatment Trial
AIM: To evaluate the role of coating seed
with zinc to increase yield & reduce rhizoctonia.
COOPERATORS: P O’Brien, Kyancutta
DATE SOWN: 15th June 1996
VARIETY: Excalibur Wheat @ 60 kg/ha
SOIL TYPE/
DESCRIPTION: Brown sandy loam
SOIL TEST RESULTS:
|
Ex P (ppm) |
Organic C (%) |
pH (1:5 water) |
|
|
23 |
0.5 |
8.2 |
|
|
Status |
Low |
Low |
Alkaline |
YIELD
POTENTIAL: 2.4
t/ha from a growing season rainfall of 232mm.
|
TR NO |
TREATMENT |
COST $/ha |
Rate Product L/t |
Rate Zinc gm/ha |
|
1 |
Teprosyn Zn |
2.96 |
4 |
144 |
|
2 |
Control |
0.00 |
0 |
0 |
|
3 |
SMARTRACE ZINC |
0.81 |
5 |
30 |
|
4 |
Expt Product |
5.70 |
1 |
0 |
|
5 |
Broadacre Zinc |
2.64 |
4 |
156 |
 |
|
|
NOTE:
- Gross return was calculated as grain price with protein adjustments less treatment costs.
- All treatments had 18:20:0 at 70 kg/ha.
- Smartrace Zinc® - Spraygro, Teprosyn Zn® - Phosyn, Broadacre Zinc® - Agrichem, Expt Product – Ag Master
DISCUSSION:
- All treatments in this trial (except control) were coated on the seed with a total liquid content of 10 litres/tonne of seed.
- All zinc coated treatments did appear to reduce the rhizoctonia root infection however it had no affect on haydie lesions.
- Zinc tissue levels were higher for the Broadacre Zinc treatment however this had no significant yield influence.
- When economics are evaluated the Smartrace Zinc® had a better gross return than the Control which in turn was greater than other seed coated treatments.
- The treatment Expt Product is now not manufactured in the formulation used in this trial. Teprosyn Zn® and Broadacre Zn® has zinc in the oxide form whilst Smartrace Zinc® is zinc in a chelate formulation.
- Spraygro Smartrace Zinc ® is a 10% W/V Zinc concentrate, it is a flowable dust free product.
