Investigating the growth of imidazolinone-tolerant chickpea

Abstract

Key points •This study assessed the growth of an imidazolonine (imi)-tolerant chickpea line being developed by Chickpea Breeding Australia (CBA) under controlled conditions at Tamworth in 2020. •Growth and root nodulation of imi-tolerant chickpea was similar to that of PBA Seamer[PBR] in control soil. •PBA Seamer[PBR] growth was significantly reduced in the presence of imazapic, whereas imi-tolerant chickpea growth was only significantly reduced where plants were grown in soil where imazapic was applied at the high rate of 72 g/ha. •Results from this experiment suggested that the imi-tolerant chickpea line was tolerant of imazapic when the herbicide was applied at the recommended rate of 36 g/ha.