06.01.2013 Views

Lentil variety sowing guide 2012 - Seed Distributors

Lentil variety sowing guide 2012 - Seed Distributors

Lentil variety sowing guide 2012 - Seed Distributors

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Pea <strong>variety</strong> <strong>sowing</strong> <strong>guide</strong> <strong>2012</strong><br />

By Michael Lines, Research Officer- SARDI,<br />

Larn McMurray, Research Scientist- SARDI<br />

& Tony Leonforte, Field Pea Breeder- DPI<br />

Victoria<br />

Two new dun type pea varieties<br />

with improved tolerance to<br />

bacterial blight (PBA Oura –<br />

OZP0703 & PBA Percy – OZP0901) will<br />

be released for <strong>2012</strong> <strong>sowing</strong>s.<br />

PBA Oura has a semi leafless plant<br />

type similar to Kaspa, but with wrinkled<br />

dun seed and slightly increased lodging<br />

susceptible at maturity. PBA Percy has<br />

a conventional plant type similar to<br />

Parafield and is susceptible to lodging.<br />

Both varieties have high yield potential,<br />

are broadly adapted and perform<br />

relatively well in short growing seasons<br />

and low rainfall climates.<br />

Both varieties are earlier flowering and<br />

maturing than Kaspa and will be better<br />

suited to crop topping and delayed<br />

<strong>sowing</strong> for blackspot management than<br />

Kaspa.<br />

These varieties will be of particular<br />

importance to growers in areas at risk<br />

of bacterial blight infection due to their<br />

improved tolerance to this disease and<br />

lower yield loss when infected by this<br />

disease than all other varieties (including<br />

Parafield which is currently the preferred<br />

<strong>variety</strong> in these areas). Both have been<br />

developed by Pulse Breeding Australia<br />

(PBA), and are licensed to <strong>Seed</strong>net.<br />

Two advanced field pea lines are<br />

currently under multiplication for<br />

potential release in <strong>2012</strong>.<br />

OZP0819 is a semileafless white pea<br />

<strong>variety</strong> which has performed particularly<br />

well across short and long season climates<br />

over recent seasons. It has high early<br />

vigour and erect growth, with excellent<br />

standability at maturity.<br />

It is early to mid flowering, and like<br />

PBA Oura and Percy does not have the<br />

pod shatter resistance trait (like Kaspa,<br />

PBA Gunyah and PBA Twilight) but is not<br />

prone to shattering.<br />

It has a favourable disease resistance<br />

profile, with good tolerance to bacterial<br />

blight and good resistance to downy<br />

mildew and bean leafroll virus.<br />

OZP0902 is a late flowering and<br />

late maturity conventional pea<br />

suitable for forage production as<br />

an alternative to vetch.<br />

It produces small white seed,<br />

but has lower seed yield that<br />

Morgan (which is generally<br />

considered a dual purpose <strong>variety</strong>) but<br />

also has higher biomass production.<br />

OZP0902 also has improved resistance to<br />

powdery mildew over Morgan.<br />

There are a number of alternative<br />

<strong>variety</strong> options that growers can choose<br />

instead of the major varieties PBA<br />

Gunyah, PBA Twilight, Kaspa and<br />

Parafield.<br />

These may provide specific advantages<br />

such as for example, higher frost<br />

tolerance (e.g. Sturt), powdery mildew<br />

resistance (e.g. Yarrum), white seed type<br />

(SW Celine) or forage potential (e.g.<br />

Morgan).<br />

However they also have specific<br />

limitations that restricts their widespread<br />

adaptation broadly across SA such<br />

as susceptibility to downy mildew, late<br />

flowering and or maturity or specific<br />

herbicide sensitivity. In addition they<br />

may also be difficult to sell and market<br />

Michael Lines<br />

from SA (e.g. small seed or white<br />

seeded types).<br />

The agronomic practice of<br />

early <strong>sowing</strong> of field peas was<br />

again popular in 2011. This<br />

practice is desirable to maximise<br />

grain yield but it has led to<br />

significant yield loss through<br />

black spot infections and frost in some<br />

years.<br />

If dry or early <strong>sowing</strong> is to be practiced<br />

all other management strategies to<br />

reduce black spot disease risk must be<br />

employed, however for the medium<br />

and high rainfall areas it is strongly<br />

recommended to delay <strong>sowing</strong> peas<br />

regardless of <strong>variety</strong> until the peak black<br />

spot spore release period has occurred<br />

due to the higher risk of increased<br />

disease epidemics.<br />

The disease forecasting model<br />

‘Blackspot Manager’ identified a reduced<br />

blackspot risk for 2011 due to the high<br />

incidence of summer rain, resulting in<br />

early spore release.<br />

PBA Oura and PBA Percy (as well as<br />

2010 releases PBA Gunyah and PBA<br />

Twilight) offer growers the option<br />

to delay <strong>sowing</strong> to reduce blackspot<br />

infection with reduced risk of yield loss<br />

Table 1. Pea <strong>variety</strong> <strong>sowing</strong> <strong>guide</strong> <strong>2012</strong>.<br />

<strong>Seed</strong> type Rainfall zone (mm)<br />

Below 400 400–475 475–600 Above 600<br />

Dun – “Kaspa type” PBA Twilight PBA Gunyah Kaspa Kaspa<br />

PBA Gunyah PBA Twilight PBA Gunyah PBA Gunyah<br />

Kaspa Kaspa PBA Twilight PBA Twilight<br />

Dun - Other PBA Oura^ PBA Oura^ PBA Oura^ PBA Oura^<br />

Parafield^ PBA Percy^ PBA Percy^ PBA Percy^<br />

Yarrum Parafield^ Yarrum Yarrum<br />

Morgan* Yarrum Parafield^ Parafield^<br />

PBA Percy^ (NT) Morgan* Morgan* Morgan*<br />

White Sturt Sturt Sturt Sturt<br />

Bundi Bundi Bundi Bundi<br />

SW Celine SW Celine SW Celine<br />

Blue Excell Excell Excell Excell #<br />

Maki Maki Maki Maki<br />

* Green manure/forage option NT = Not tested ^ Preferred varieties where bacterial blight is a production<br />

constraint<br />

43

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!