CLEAN SEED AND FUNGICIDAL SEED DRESSING - AN ESSENTIAL FIRST STEP TO MANAGING CHICKPEA ASCOCHYTA
Ascochyta is the main disease that needs to be managed when growing chickpea crops. Best practice guidelines recommend that all chickpea seed should be treated with a fungicidal seed dressing, which should be followed by an early season foliar fungicide to minimise seed borne ascochyta infection. A late season spray should be applied, particularly if disease levels are high and/or if seed is to be retained for the following crop. However, our observations in 2020 indicated that the majority of ascochyta infections in grower’s paddocks were seed borne, rather than entering paddocks off stubble - suggesting that best practice guidelines are not always being followed. Therefore, we felt it wise to further demonstrate the effectiveness of using clean seed and seed applied fungicide in order to minimise the amount of ascochyta in a chickpea crop, and demonstrate the effectiveness of early season foliar fungicides to keep disease levels at bay. ***Important: This trial will involve the use of seed that is known to be infected with ascochyta – resulting in high disease levels by mid-winter/early spring** I talked to Harry on 19/3 and he is ok with us bringing in ascochyta infected seed. He prefers this trial to be in paddock 1 so that his 2022 crop is not affected Dependent on disease levels, we will apply extra foliar fungicides to some plots, and they may be mowed prior to harvest and stubble taken away to ensure the farmer is not left with an unacceptable ascochyta inoculum load. This will take place after the Spring Field Day to allow maximum presentation of the site prior to decontamination. If this is deemed necessary, it will mean that we may not be able to provide biomass, yield or grain quality data for some/all treatments, however it will demonstrate the need for clean seed, seed dressing and early fungicide application to limit ascochyta infection.
Proposed Trial Site Design and Treatments
Table 1. Outline of proposed treatments at each site.
25m x 50m trial size. Don’t have exact treatment layout yet. Preferred paddock 1.
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Name: Stacey Power
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Mailing Address: PO Box 483, Northam 6401