This variety has been specially bred to reduce nematodes, it has a unique combination of the highest resistance to beet-cyst nematodes and Root-knot nematode resistance. Doublet will produce a long tap root up to 2 meters deep, which will improve the soil structure and is frost resistant up to minus 6°C. Doublet is very leafy at the early stages of growth and is easily incorporated for maximum nematode control and is club root resistant. Doublet flowers late and will not set seed when sown in late summer or early autumn.

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Doublet is resistent to:

• Heterodera schachtii (BCN) Nematode Resistant Level 1  

• Heterodera betea (BCN)                    

• Meloidogyne chitwoodi and M. fallax (RKN)

• Meloidogyne javanica (RKN)

• Para trichodorus allius (stubby root nematode)

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Doublet is non-host to:

• Globodera rostochiensis and G. Pallida (Potato cyst nematode PCN)

• Heterodera avenae (cereal cyst nematode)

• Heterodera goettingiana (pea cyst nematode)

• Meloidogyne naasi (cereal root knot nematode RKN)

• Ditylenchus dipsaci (bulb nematode)

• Ditylenchus destructor (potato tuber nematode)

• Pratylenchus scripnerie (Scribner's lesion nematode)

• Tobacco rattle virus (TRV)