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Douglas (Pseudotsuga douglasii) mychorrized with  Laccaria bicolor S238N HAUTE PERFORMANCE® grown in GODET ROBIN ANTI-CHIGNON® R400 containers, 6 months old.

These plants are inoc­u­lated with the ec­to­my­c­or­rhizal fungus LAC­CARIA bi­color S238N chosen by the INRA Centre in Nancy. Re­search has been car­ried out by INRA in
part­ner­ship with our nursery and that of our col­league. After sev­eral years of trials, this col­lab­o­ra­tion has cul­mi­nated in com­mer­cial pro­duc­tion. Which has en­abled us
to be able to offer you plants that offer a higher yield than tra­di­tional plants with just nat­u­rally oc­curing my­c­or­rhiza, be­cause nat­ural my­c­or­rhiza­tion in the nursery does not give an ad­van­tage to the plant. The fol­lowing figure shows the re­sults ob­tained over ten years by INRA in the net­work of com­par­a­tive crops.

10-year-old Douglas (exemples from the experimental plantation network from the INRA)



Logo licence and monitoring by L'INRA


The mon­i­toring car­ried out in our nursery by INRA guar­an­tees a good level of my­c­or­rhiza­tion by the inoc­u­lated stock in ac­cor­dance with strict spec­i­fi­ca­tions. LAC­CARIA bi­color S238N is a stock orig­i­nating in the open air of Dou­glas in the North West of the USA. It is par­tic­u­larly suited to the species for which it stim­u­lates the ini­tial growth for at least ten years. Mon­i­toring is car­ried out using a label dated and num­bered placed on each crate of plants.

The economy car­rying out a clearing is a re­al­istic ob­jec­tive taking into ac­count the ex­per­i­mental re­sults of INRA.

My­c­or­rhizae are fragile or­gan­isms, sen­si­tive to ex­ternal con­di­tions. The My­c­or­rhiza­tion is very fragile and rapidly dis­ap­pears on con­tact with air. The con­tainer ROBIN ANTI-CHIGNON® al­lows the de­vel­op­ment of a beau­tiful root system and shel­ters my­c­or­rhiza­tion from con­tam­i­nants. The con­tainer pre­serves the root system and keeps the my­c­or­rhizae in tact until the mo­ment of planting thus con­serving all the ben­e­fits of the con­trolled my­c­or­rhiza­tion
As the trial re­sults show, the inoc­u­lated plants with a LAC­CARIA bi­color S238N stock should be placed in acidic soils : pH (water) op­timum of the soil 5 to 5.5. We should avoid placing the plants in soils in­vaded with grasses.


My­c­or­rhizae formed by the fungi LAC­CARIA bi­color S238N with a Dou­glas root. The my­c­or­rhizae are mixed or­gan­isms root – fungus. They are the site of a sym­biosis which means an as­so­ci­a­tion of mu­tual ben­efit :
the tree re­ceives sugars and the fungus in re­turn sends water and min­erals to­wards the root, while pro­tecting
against cer­tain pathogens and pro­ducing growth reg­u­la­tors. The my­c­or­rhizal fungi are nu­merous, but cer­tain, like LAC­CARIA bi­color S238N, are more ef­fec­tive than others in stim­u­lating tree growth.

Douglas s238N® roots mycchorized with Laccaria bicolor s238N

Coforêt site in Ronno (69). Douglas (Pseudotsuga douglasii) HAUTE PERFORMANCE® mycchorized with Laccaria Bicolor S238N, plantation in ROBIN ANTI CHIGNON® R200 cm containers, one year old, 15 cm high at least, picture taken 2,5 years after the plantation, average hight of plants: 150 to 180 cm, recovery rate 99%, only one clearing was made