Variety traits
Herbicide tolerance is the genetically determined ability of a crop variety to withstand the phytotoxic effects of chemical agents, allowing for the application of herbicides to growing crops without suppressing the crop.
Mentioned in descriptions 5 668 varieties reference book.
The herbicide tolerance of a variety is the genetically determined ability of a cultivated plant to withstand the phytotoxic effects of a specific chemical agent. In practice, this allows for the application of broad-spectrum herbicides directly to the growing crop without the risk of damage or loss of the stand, which significantly simplifies weed control.
This trait is evaluated within the framework of state variety testing using field and laboratory test methods. In field conditions, plots subjected to chemical treatment are compared with control samples, where plant density preservation, the absence of phytotoxicity signs (chlorosis, necrosis), and growth rates are recorded. Laboratory methods include dose-response analysis to determine survival rates at various application rates of the chemical.
Tolerance indicators are expressed in visual damage scores, percentage of stand density preservation, or productivity levels relative to an untreated standard. High tolerance is characterized by the preservation of full productivity when the recommended full dose of herbicide is applied. With low tolerance, even reduced doses cause growth retardation and yield loss; therefore, an important parameter for variety selection is its compatibility with the specific mode of action of the applied chemical.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Helianthus annuus L. · Sunflower
Jean Pierre Dufourcq
Helianthus annuus L. · Sunflower
Syngenta Participations,CH
Helianthus annuus L. · Sunflower
SYNGENTA FRANCE S.A.S.
Helianthus annuus L. · Sunflower
Syngenta Participations,CH
Helianthus annuus L. · Sunflower
Syngenta Participations,CH
Triticum aestivum L. · Bread wheat
Syngenta Hadmersleben
Glycine max (L.) Merr. · Soybean
RAGT semences
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Helianthus annuus L. · Sunflower
Pioneer Overseas Corporation, USA
Lolium perenne L. · Perennial ryegrass
ILVO-PLANT 39
Helianthus annuus L. · Sunflower
PANAM FRANCE SARL
Helianthus annuus L. · Sunflower
ROUANET
Helianthus annuus L. · Sunflower
Philippe Moreau
Helianthus annuus L. · Sunflower
PHILIPPE JOUVE
Helianthus annuus L. · Sunflower
Limagrain Verneuil Holding (FR)
Zea mays L. · Maize
Ragt, F
Helianthus annuus L. · Sunflower
Syngenta Participations,CH
Helianthus annuus L. · Sunflower
Rene Baratin
Triticum aestivum L. · Bread wheat
LIDEA FRANCE SAS
Solanum tuberosum L. · Potato
Kweek- en Researchbedrijf Agrico B.V.
Festuca ovina L. · Sheep's fescue
D J Van der Have BV (NL)
Helianthus annuus L. · Sunflower
Patrick Duhigg
Helianthus annuus L. · Sunflower
Nikolae Parvu
Triticum aestivum L. · Bread wheat
Ragt, F