It is best to sow the shortest season variety possible and sow after a rain event not before. Machete wheat is very sensitive to simazine and atrazine and should not be grown after a canola crop. Cadoux and Cascades varieties have been shown to have better tolerance. Either way, it is best to use the same sowing techniques as for barley grown after a canola crop. Either grasses or clover pasture are an option to grow after a triazine tolerant canola crop, although they may struggle there will be plenty of canola to supplement the grazing.
Cereals grown after imidazoline tolerant canola are a definite risk.
Lupins and pulses are a safe option, although volunteer canola will be a problem weed. The safest option is an IT wheat, if seed can be obtained. Dr Piper said legumes could be at risk of herbicide residues if grown after a cereal crop where SU herbicides have been used. Triazine tolerant and conventional canola varieties are not as sensitive as legumes, but there may still be a risk so it is best to do a pot test. Click on the image for a larger view Caption Electronic jpg photographs available on request.