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Your best offense is a strong defense.

After years of record-setting canola acres, many growers face challenges as a consequence of tight canola rotations. Clubroot is a serious disease that can cause major yield loss. Putting an integrated pest management (IPM) plan in place is the first step to take when confronted or concerned with clubroot. Using a hybrid with built-in resistance is one tool available to help manage the disease. Maximize and protect the potential of your crop with InVigor® hybrids that contain a "C" within their name, as they've all been designed to help defend against clubroot and maximize yield.

Clubroot-resistant genetics from InVigor.

All InVigor clubroot-resistant hybrids have been developed to be resistant to the most predominant clubroot pathotypes found in Canada at the time of their registration.

The two new hybrids InVigor L345PC and InVigor L352C, along with InVigor L255PC all contain the same clubroot resistance profile. InVigor L234PC contains this resistance profile plus it contains second generation clubroot resistance to additional emerging clubroot pathotypes, to help combat the ever-evolving clubroot pathogen. Second generation clubroot resistance is designed to combat clubroot in fields that still (or start to) show signs of the disease, despite seeding a first generation clubroot-resistant hybrid as part of an integrated management plan.

Clubroot populations in the field can evolve or shift to new pathotypes that current resistant hybrids may be susceptible to. These new pathotypes may become dominant in the clubroot population if no additional integrated pest management approaches are taken and canola hybrids with similar resistance profiles are used repeatedly in the same field. To maximize the durability of genetic resistance in canola hybrids, use an integrated pest management strategy that includes extending rotations in areas where clubroot is a concern. We support the Canola Council of Canada’s agronomic recommendations when growing these InVigor hybrids.

To extend the effectiveness of clubroot resistance genes and when growing clubroot-resistant hybrids in fields known to contain clubroot, we recommend growing first generation clubroot-resistant hybrids for two cycles or until clubroot symptoms appear, whichever comes first. Only after one of these conditions is met should you consider switching to second generation resistant hybrids.

Incorporating a clubroot-resistant hybrid into your integrated pest management plan is an excellent tool to aid in clubroot management.

Clubroot-resistant hybrids.

Our newest 300 series hybrid demonstrated exceptionally high yield potential in both external WCC/RRC trial results and internal BASF breeding trial results.1 It features the patented Pod Shatter Reduction technology as well as first generation clubroot resistance.2


Yield Potential 111.9% of the checks (InVigor 5440 and Pioneer® 45H29) in the 2017/2018 WCC/RRC trials
111.4% of InVigor L233P (n=28 trials, 2018)
Maturity 1 day earlier than InVigor L252
Height Medium
Lodging resistance Strong
Blackleg rating R (resistant)
Growing zone All growing zones
Herbicide system(s) LibertyLink®
Agronomic trait(s) Patented Pod Shatter Reduction technology
First generation clubroot resistance2

Suitable for all growing zones, new InVigor L352C offers a significant jump in yield potential and features first generation clubroot resistance.2 This hybrid yielded 104% of InVigor L252 in the internal InVigor trials. It’s an ideal hybrid for growers who prefer to swath their canola.

Yield potential 108.6% of the checks (InVigor 5440 and Pioneer 45H29) in the 2017/2018 WCC/RRC trials
104% of InVigor L252 (n=28 trials, 2018)
Maturity Half a day earlier than InVigor L252
Height Medium
Lodging resistance Strong
Blackleg rating R (resistant)
Growing zone All growing zones
Herbicide system(s) LibertyLink
Agronomic trait(s) First generation clubroot resistance2

With both the patented Pod Shatter Reduction technology and second generation multigenic clubroot resistance, InVigor L234PC offers outstanding yield potential and strong standability similar to InVigor L233P. This hybrid is a great fit for growers in known clubroot-affected areas.


Yield potential 104% of the checks (InVigor 5440 & Pioneer 45H29) in 2017 WCC/RRC trials
Maturity 3 days earlier than the average of the checks
Height Medium
Lodging resistance Strong
Blackleg rating R (resistant)
Growing zones All growing zones
Herbicide system(s) LibertyLink
Agronomic trait(s) Patented Pod Shatter Reduction technology
Second generation clubroot resistance2

This medium-height hybrid has excellent standability and performance and is well suited for growers in mid- to long growing zones. InVigor L255PC separates itself from other hybrids due to its impressive standability and the benefit it offers of both the patented Pod Shatter Reduction technology and first generation clubroot resistance.2

Yield potential 109% of the checks (InVigor 5440 and Pioneer 45H29) in 2016 WCC/RRC trials
Maturity 1.5 days later than the average of the checks
Height Medium
Lodging resistance Very strong
Blackleg rating R (resistant)
Growing zones All mid- to long growing zones
Herbicide system(s) LibertyLink
Agronomic trait(s) Patented Pod Shatter Reduction technology
First generation clubroot resistance2

1 Western Canadian Canola/Rapeseed Recommending Committee (WCC/RRC) trials.
2 To predominant clubroot pathotypes found in Canada at the time of registration. InVigor L352C, InVigor L345PC and InVigor L255PC all share the same 1st generation clubroot resistance profile. InVigor L234PC has this resistance profile plus it contains 2nd generation multi-genic clubroot resistance to additional clubroot pathotypes to help combat evolving clubroot pathotypes.

Frequently asked questions about clubroot in canola.

What is a clubroot-resistant canola hybrid?

A clubroot-resistant hybrid is a hybrid that is bred to be resistant to clubroot. This means that it is resistant to the predominant clubroot strains or pathotypes in Canada. No clubroot-resistant hybrids, including new ones with multiple resistance genes, are resistant to all the clubroot pathotypes detected in Canada to date.

There is a classification system ranging from:

Resistant (R) – less than 30% infection compared to susceptible checks.
Intermediate (I) – between 30 and 50% infection compared to susceptible checks.
Susceptible (S) – more than 50% infection compared to susceptible checks.

What is a farming community?

With respect to clubroot, a farming community is the area where you or others conduct your farming activities. If you farm across a large geography, or if you have external contractors that drive in your fields (custom work, agronomic support, etc.) and they travel larger distances, your community will be quite large.

If you find clubroot in your field(s) for the first time, what should be done?

The goal with scouting for clubroot is to find the problem early.

  1. Pull the infected plants and either burn them or bury them in a landfill.
  2. Lime the area to increase the soil pH – talk to your local Canola Council of Canada Agronomist regarding lime sources, particle sizes and rates, as this is an area where the science is quickly evolving.
  3. Stop the movement of dirt from 2X the area and consider planting it to grass.
  4. Increase your canola rotation to a minimum of 1 in 3 years.
  5. Increase the scouting on your farm.
  6. At a minimum, tell your neighbors that you found clubroot and tell them what your management plan is. Also consider reporting to the local Canola Council of Canada Agronomist.
  7. Grow a resistant hybrid – consider first generation genetics.
  8. Control volunteer canola and other brassica species in canola and non-canola crops.
You've been growing a clubroot-resistant hybrid and now are noticing patches that are thin and ripening early and are seeing large galls on the roots. What should be done?

Follow the same steps outlined above with the addition of the following:

  • Consider having the shifted or newly introduced population pathotyped. Fields in Canada that have more than one pathotype in the soil. With the use of resistance genetics, you will control the pathotypes that your hybrid has resistance to, but over time because there are spores from other pathotypes that are not being controlled, you could see the predominant pathotype shift in your field. Also, selection pressure on the pathotypes being controlled can cause genetic changes in virulence of the pathogen to overcome resistance. To get galls tested for the predominant pathotype talk to your local Canola Council of Canada Agronomist who can get it sent for pathotyping.
  • Grow a canola hybrid with second generation genetics the next time you grow canola on that field.
How much yield loss can growers expect from clubroot in canola?

0 to 100% – the following are estimates based on field observations if you do not use control measures:

  • 1st year yield losses are typically below 1%.
  • 2nd canola cycle: approximately 10% yield loss.
  • 3rd canola cycle: greater than 50% yield loss.
  • 4th canola cycle: 90% or greater yield loss.
In a confirmed clubroot field, how quickly will the pathotypes shift if you have been growing a clubroot-resistant hybrid?

It depends on your rotation. If you are farming with a short rotation (more frequent than one canola crop every three years) under a high clubroot spore load, you could see the perdominant pathotype shift after your second canola crop. Under a lower spore load and a longer rotation between canola crops, you will get more canola crop cycles.

What is the difference between high spore load and low spore load?

It is very difficult to quantify a low spore load. We can only tell if farmers have a high spore load – 1x105 spores per gram of soil is a high spore load.

  • Soil tests for clubroot spore load results could be used to assess the clubroot risk level, but the downside of this test could be that it could create problems for interpretation. Fewer spores mean lower risk, but clubroot infection can still occur at 1,000 spores per gram of soil, or less. If one field has 10,000 spores per gram and the neighbouring field has 100,000, both fields could have a problem due to potential soil movement between fields. Furthermore, if a test shows 1,000,000 spores per gram, the field is clearly at risk and symptoms are likely to appear under most conditions.
  • Adding to the grey area is that results can be different depending on the lab (results cannot be compared lab to lab because of their different sampling, storage, extraction and analysis protocols).
  • When sampling to determine the spore load in a heavily infested area, collect samples from only that area, as a composite sample from other areas may dilute the spore concentration. Also, to get a fair estimate of spore load within a heavily infested area, include soil from the canola row and from between the rows (Canola Watch how to test for clubroot pathogen, 2018)
  • The bottom line on soil testing for clubroot is that several labs offer this service, and positive results can be a useful management tool, but negative results do not mean the field is risk-free as it could just come down to not sampling the right area.
What clubroot pathotypes is InVigor® L234PC resistant to? Where should it be grown?
  • The nomenclature around clubroot pathotyping continues to evolve as the science and detection methods advance. Due to this uncertainty, there is real risk that what we believe is a particular pathotype today, may actually be a population of multiple pathotypes that we have yet to understand.
  • InVigor L234PC is resistant to the predominant pathotypes present across Canada, plus additional recent newer pathotypes.
  • InVigor L234PC has been tested and is resistant against a wide range of clubroot pathotypes, including many of the new pathotypes that have been identified, and we are confident that InVigor L234PC is going to be effective against most of these new and emerging pathotypes.
  • In fields where InVigor L255PC cannot be grown due to the pathotypes that have overcome the resistance within this hybrid, InVigor L234PC can be used as it will perform better due to additional effectiveness against some of the new pathotypes.
  • InVigor L234PC is good option in areas where clubroot has been a problem for several years and a grower has used the first generation hybrids for two cycles or until clubroot symptoms appear, which ever comes first.
What is a first generation versus second generation clubroot hybrid?
  • First generation hybrids contain resistance genetics that were initially deployed to combat clubroot for InVigor hybrid canola. This includes InVigor L255PC. They were designed to control the predominant pathotypes in Canada at the time of their registration.
  • Second generation hybrids contain additional sources of resistance designed with multiple genes so that they are effective against a wider range of pathotypes.
There is currently no clubroot found on my farm or in my farming community. What InVigor hybrid should I be growing?

Grow the InVigor hybrid that best meets your needs for yield potential and agronomic characteristics (either non-clubroot resistant or first generation clubroot resistant). Remember to keep scouting for clubroot on your farm and utilize good IPM strategies, regardless of your hybrid choice.

If not particularly concerned or have little risk of clubroot infection but a clubroot hybrid has an agronomic characteristic of interest such as standability or exceptional yield and potential to straight cut (InVigor L255PC), should I be growing it?

While we would likely suggest a hybrid such as InVigor L252 for standability, or InVigor L233P for exceptional yield potential, the clubroot hybrid noted above does have a good fit based on those agronomic characteristics.

In both cases there is a theoretical risk in exposing the clubroot-resistant genes to low levels of clubroot spores that may be undetected by the grower. Exposing the clubroot resistance genes to this low level of spores could cause the population to shift prior to needing the clubroot genetics to help manage the disease on your farm.

Other companies are labeling what pathotypes they are resistant to. What is BASF's response to this approach?

The science and nomenclature are evolving, and we continue to learn about clubroot population dynamics. Secondly, clubroot pathotypes within populations are diverse and are highly variable within a field. Generalizations about predominant pathotypes can lead to poor field performance. Furthermore, there are no commercial testing facilities providing robust pathotyping for clubroot currently.

I have not identified clubroot on my farm, but it is a growing concern in my area. What InVigor hybrid should I be growing?

Grow a non-clubroot-resistant or a first generation clubroot-resistant InVigor hybrid, whichever you feel performs best on your farm and in your area. Remember to keep scouting for clubroot on your farm and utilize good IPM strategies.

I have not identified clubroot on my farm, but some of my neighbours have found it on theirs. What InVigor hybrid should I be growing?

Consider growing a first generation clubroot-resistant InVigor hybrid combined with aggressive scouting and good IPM strategies.

I have identified clubroot on my farm in non-clubroot-resistant hybrids. What InVigor hybrid should I be growing?

Grow a first generation clubroot-resistant InVigor hybrid on all your canola acres combined with aggressive scouting and good IPM strategies for managing clubroot, which includes extending your crop rotation to a minimum of 1 in 3 years. For example:

Year 1: Canola
Year 2: Wheat
Year 3: Soybean
Year 4: Canola

I have identified clubroot on my farm in non-clubroot-resistant hybrids and have grown first generation clubroot-resistant hybrids for the last two cycles. What InVigor hybrid should I be growing?

Consider growing second generation clubroot-resistant InVigor hybrids across all your canola acres combined with aggressive scouting and good IPM strategies. First generation hybrids can still be an option, providing you actively scout for clubroot and implement a minimum 1-in-3-year crop rotation.

I have identified clubroot in my first generation clubroot-resistant hybrids. What InVigor hybrid should I be growing?

Start growing second generation clubroot-resistant InVigor hybrids combined with aggressive scouting and good IPM strategies which includes extending your crop rotation to a minimum of 1 in 3 years.

What should growers and agronomists look for in terms of clubroot and where?
  • Look for areas with premature ripening, thin canola areas.

    FAQ IMAGE 1

    Source: Strelkov, S., 2015. Found in Clubroot disease of canola and mustard, Agri-Facts, Alberta Agriculture and Rural Development

  • Scout near field entrances and areas where water has moved soil.
  • Pull plants and look for gall formations on roots – if late in the season, galls may have decayed into sawdust-like brown material. DNA tests can provide confirmation.

    FAQ IMAGE 2

    Source: Turkington, K., 2015. Found in Clubroot disease of canola and mustard, Agri-Facts, Alberta Agriculture and Rural Development

  • If no patches exist, then dig up the roots of random plants near field entrances or other high-traffic areas.
  • Scout non-canola fields and look at brassica weeds e.g. shepherd's-purse, stinkweed, flixweed, wild mustard and volunteer canola, which can act as a host and become infected.
  • Be sure to consider volunteer canola as a potential source of clubroot, even if the volunteers are from a clubroot-resistant hybrid.
Who should be growing a clubroot-resistant hybrid?

If you have clubroot on your farm or you know that there are fields that are infected with clubroot in the community that you farm in, you should be growing a resistant hybrid.

Clubroot-resistant canola decision checklist.

Each grower has a different level of risk tolerance and needs to make decisions appropriate for their farming operation. If you feel that you are doing a good job with the checklist, then growing an InVigor hybrid that best fits your operation is likely the best decision for your farm. Otherwise, growing a clubroot-resistant hybrid will be your best choice.

  • Growing canola in a 1 in 3 year or greater rotation.
  • Scouting, especially near field entrances for early detection of clubroot.
  • Minimizing tillage to prevent soil movement.
  • Limiting or eliminating external traffic on fields.
  • Cleaning equipment prior to entering fields.
  • Having a soil pH of 7.2 or greater, or considering liming of fields with lower pH