[ASC-media] AFFINITY FOR PULSES: Crop Doctor

Brendon Cant brendon at iinet.net.au
Wed Oct 18 01:05:33 CEST 2006



Results from Grains Research and Development Corporation (GRDC) supported
research to find more herbicide tolerant pulse varieties is providing cause
for optimism in the fight against increased chemical resistance.


In its lupin and chickpea germplasm screening project, the Centre for
Legumes in Mediterranean Agriculture (CLIMA) has found the agrochemical
Affinity (carfentrazone-ethyl) had potential to be used for selective
control of wild radish in lupins and chickpeas.


The Queensland based producers of the chemical have also shown interest in
the work, which could auger well for getting the herbicide registered for
use in lupins and chickpeas once tolerant cultivars are developed and


Wild radish is one of WA's dominant herbicide resistant weeds and while not
yet widespread in WA, numbers are increasing. A registered selective
herbicide capable of knocking out the tenacious weed would prove invaluable
to growers.


Affinity is a relatively new herbicide registered for use post-emergence
when it is mixed with MCPA to control wild radish and other broad leafed
weeds in cereals.


UWA-based CLIMA researcher, Dr Ping Si said Affinity acted fast with leaf
damage to weeds visible within one week of application and wild radish
completely scorched at the recommended rate of use.


But there was large variation in lupin and chickpea responses, with some
genotypes showing limited foliage damage, while others, at recommended
rates, were completely scorched.


Dr Si said tolerant genotypes recovered from foliage damage and grew into
normal plants without any symptoms, even at above recommended rates.


The next stage is to develop cultivars that are damaged only minimally at
any growth rate when Affinity is applied. Mutation breeding has already
started in lupin and chickpeas to identify good tolerance to Affinity.


Field peas, lentils and faba beans are also included in the GRDC supported
project conducted by CLIMA in collaboration with the Department of
Agriculture and Food, the WA Herbicide Resistance Initiative and the
National Pulse Program.


The Crop Doctor is GRDC Managing Director, Peter Reading, Tel 02 6272 5525

Further Information: Dr Ping Si, Tel 08 6488 1233

GRDC REF: CDAug062.doc/UWA00097/MacLean

Brendon Cant & Associates
Public Relations & Marketing 
Suite 5
4 Gugeri St
Claremont WA 6010
Tel 08 9384 1122



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