CROMPUTER CR
Autumn Seed

Helping to bridge the gap between clubroot-protected varieties and ‘normal’ varieties

Profile

Status: AHDB Recommended List 2026/27

CROMPUTER CR is a new clubroot-protected variety designed to bridge the gap between traditional clubroot varieties and ‘normal’ hybrids. In many situations, it is matching and often out-yielding them.

A high-vigour variety, CROMPUTER CR establishes rapidly and develops tall plants with a compact, well-structured canopy. It delivers a significant yield advantage over existing clubroot varieties, while also offering TuYV resistance and improved stem canker protection.

Later flowering than competing varieties, CROMPUTER CR gives growers greater flexibility with spring spray timings, helping to spread workload and reduce the risk of frost damage.

Now recommended for use on clubroot-infected land, CROMPUTER CR is a strong performer on the AHDB Recommended List, achieving (Gross Output – 97% and Seed Yield – 97%), it also scores well for oil content (46.1%). It has a strong score for Light Leaf Spot (6) and Stem Canker (5). Cromptuer CR has one of the highest scores for Verticillium with an MR rating.

At DSV, we always aim to deliver yield with traits rather than traits at the expense of yield. Clubroot has become more apparent on farms during the last five years, with closer rotation meaning it is often costly and hard to control.

Alongside clubroot-protected varieties, it is also important to consider other factors, such as the PH of the soil should PH 7 or above, and calcium can be added, lengthening rotations, and consideration can be given to the eradication of brassica weeds, such as runch and charlock which can amplify the problem.

CROMPUTER CR may, however, be infected by certain strains and infections that have been reported in some fields. Early drilling is not advised as this can put pressure on the protection. Where possible clubroot varieties shouldn’t be drilled before the third week of August. DSV recommends Clubroot tolerant varieties such as CROMPUTER CR and CROCODILE CR should be grown in a 1 in 5 rotation free from brassicas to protect their resistance mechanisms any closer rotation could increase the chances of a breakdown.

We encourage growers to visit the following page provided by the AHDB before growing this variety to reduce the risk of resistance breakdown: https://ahdb.org.uk/knowledge-library/clubroot-managementin-oilseed-rape-cropping-factors

It is important that growers protect the clubroot genetics by only planting the variety where clubroot is known to be an issue. Due to the rapid development of the lower branches of CROMPUTER CR, DSV recommends a sowing rate of 40 – 50 seeds per m2 and a PGR in spring is only required on fertile sites to ensure efficient harvestability. Its vigorous autumn growth allows it to be drilled over a broad range of dates without any issues.