5 July 2023 News
The International Bremia Evaluation Board for the EU (IBEB-EU) has announced three new Bremia races: Bl:38EU, Bl:39EU and Bl:40EU. Our tests confirm that a significant portion of Enza Zaden's lettuce portfolio shows High or Intermediate resistance to these races. We have created a leaflet and updated our local websites to provide an overview of lettuce varieties with these new Bremia resistances.
Bremia lactucae
Bremia lactucae, causing downy mildew in lettuce, is genetically very variable. It occurs worldwide and represents a great problem for the yield and quality of cultivated lettuce. Due to the high variability of the pathogen, there could be frequent mutations in the virulence genes, and newly emerging races could rapidly break the resistance genes.
The International Bremia Evaluation Board for the EU (IBEB-EU) evaluates over 300 European isolates annually, focusing on lettuce varieties from breeder's and grower's fields.
They track the emergence of new races and the disappearance of known races.
New announcement: BI:38EU, BI:39EU, BI:40EU
The IBEB-EU recently announced the introduction of three new Bremia races: BI:38, BI:39, and BI:40, and the removal of BI:16-28.
Breeders are working together to monitor the changes in the Bremia population in response to the introduction of increased resistance. After the test following IBEB-EU Protocol, we conclude that Enza Zaden’s lettuce portfolio offers a wide range of solid varieties with excellent field performance, outstanding post-harvest quality, and High or Intermediate Resistance to Bremia. In combination with your usual preventive treatments, these varieties ensure a high level of protection, leading to successful lettuce production.
The International Bremia Evaluation Board for the EU (IBEB-EU) has announced three new Bremia races: Bl:38EU, Bl:39EU, and Bl:40EU. Our tests confirm that a significant portion of Enza Zaden's lettuce portfolio shows High or Intermediate resistance to these races. We have created a leaflet and updated our local websites to provide an overview of lettuce varieties with these new Bremia resistances.
Bremia lactucae
Bremia lactucae, causing downy mildew in lettuce, is genetically very variable. It occurs worldwide and represents a great problem for the yield and quality of cultivated lettuce. Due to the high variability of the pathogen, there could be frequent mutations in the virulence genes, and newly emerging races could rapidly break the resistance genes.
The International Bremia Evaluation Board for the EU (IBEB-EU) evaluates over 300 European isolates annually, focusing on lettuce varieties from breeders' and growers' fields. They track the emergence of new races and the disappearance of known races.
New announcement: BI:38EU, BI:39EU, BI:40EU
The IBEB-EU recently announced the introduction of three new Bremia races: BI:38, BI:39, and BI:40, and the removal of BI:16-28.
Breeders are working together to monitor the changes in the Bremia population in response to the introduction of increased resistance. After the test following IBEB-EU Protocol, we conclude that Enza Zaden’s lettuce portfolio offers a wide range of solid varieties with excellent field performance, outstanding post-harvest quality, and high levels of disease resistance. In combination with your usual preventive treatments, these varieties ensure a high level of protection leading to successful lettuce production.
Read the full press release from IBEB
Bl:16-28EU Removal: Lettuce Resistance Update
Check out our complete lettuce resistance portfolio :
Bremia resistances Bl:29-36EU,38-40EU