CHICKPEA INOCULANT PLACEMENT
COMPARISON OF CHICKPEA INOCULANT PLACEMENT AND THE INTERACTION WITH SEED APPLIED FUNGICIDE
To evaluate different methods of inoculating chickpeas with rhizobia, and the interaction of these products with seed applied fungicide
Chickpeas are a well suited break crop option for the Dalwallinu region. Good root nodulation from symbiosis of rhizobia and plant roots is required for improved chickpea growth, as well as providing nitrogen benefits to following cereal crops. Whilst it is recommended that all chickpea crops are treated with seed applied fungicide to manage seed borne Ascochyta risk, it is also known that fungicide based seed dressings can impact on survival of rhizobia and limit root nodulation.
We plan to demonstrate a range both peat and granular inoculant options for chickpeas, placement of these products with seed vs. with fertiliser, and the interactions of these products with seed applied fungicide to ensure growers are aware of best practice methods for achieving good nodulation on their chickpea crops.
This trial was sown into wet soil within 24 hours of seed inoculation. This provided excellent conditions for root nodulation to develop. Unfortunately, sampling of root matter and nodules has been delayed due to the extremely wet winter and very heavy soil at this trial site. In a similar trial in the central wheatbelt, the dry peat granules, peat slurry and double peat slurry had significantly higher root nodulation than clay-based granules or nil treatments. Despite the acidic nature of seed applied fungicide treatment, it did not affect root nodulation at that site. Samples will be taken at this site as the soil dries out and results presented will be available at the spring field day.
This trial is part of the DPIRD/GRDC co-investment “DAW1903-004RTX: High Value Pulses - Raising awareness, optimising yield and expanding the area of lentil, chickpea and faba bean in Western Australia”. Thanks to the Wongan Hills TSU for trial management and Liebe Group for their support in providing trial sites.
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