1) Legumes used as cover crops before planting sugar beets can impact nitrous oxide (N2O) emissions. Data from experimental fields in France from 2009-2015 was analyzed.
2) Results showed that all cover crops reduced nitrate leaching compared to bare soil, and also reduced N2O emissions. Mixed cover crops of crucifers and legumes were the most effective at reducing nitrate leaching and nitrogen fertilizer usage, leading to the largest N2O emission reductions.
3) When the nitrogen from cover crop residues was accounted for in the calculations, the overall emission reduction was less positive, with legume-only and mixed cover crops being penalized the most. Further modeling work
1) Legumes used as cover crops before planting sugar beets can impact nitrous oxide (N2O) emissions. Data from experimental fields in France from 2009-2015 was analyzed.
2) Results showed that all cover crops reduced nitrate leaching compared to bare soil, and also reduced N2O emissions. Mixed cover crops of crucifers and legumes were the most effective at reducing nitrate leaching and nitrogen fertilizer usage, leading to the largest N2O emission reductions.
3) When the nitrogen from cover crop residues was accounted for in the calculations, the overall emission reduction was less positive, with legume-only and mixed cover crops being penalized the most. Further modeling work
7. S’adapter en fonction de la date de récolte
Septembre Octobre Novembre
Variétés intermédiaires
Variétés sensibles
Variétés tolérantes
3 choix en fonction des plannings d’arrachage :
8. Variétés tolérantes cercosporiose : conseils 2023
Rhizomanie
3
ans
BTS 2045 FPR
CASTOR FPR
JELLERA KWS FPR
NOVALINA KWS FPR
2
ans
CAMELEON
JIMMY
GOELETTE FPR
1
an
BTS 5090 FPR
CHRISTOPHA KWS FPR
Nématodes
3
ans
ARUM
2
ans
BTS 6975 N FPR
1
an
AURELIA KWS
TWAIN
Rhizoctone brun
3
ans
NAVAJO
1
an
1 K133
9. Quelle stratégie fongicide adopter ?
Légende :
Cu = Cuivre
Spy = Spyrale
T = Timbal EW
P = Passerelle
IFT = Indice Fréquence Traitement
130
141
150
152 152
0
1
2
3
4
5
6
115
120
125
130
135
140
145
150
155
Cu*3 Spy/T+P/Spy Cu/T+P/spy Spy+Cu/T+P/Spy Spy+Cu/T+P+Cu/Spy
IFT
stratégie
Rendement
en
PV
(T/ha)
Comparaison entre les protections fongicides - 2022 - Variété tolérante - Bordeaux en Gâtinais
10. Quelle stratégie fongicide adopter ?
Légende :
Cu = Cuivre
Spy = Spyrale
T = Timbal EW
P = Passerelle
IFT = Indice Fréquence Traitement
2
2
2
3 4
130
141
150
152 152
0
1
2
3
4
5
6
115
120
125
130
135
140
145
150
155
Cu*3 Spy/T+P/Spy Cu/T+P/spy Spy+Cu/T+P/Spy Spy+Cu/T+P+Cu/Spy
IFT
Rendement
en
PV
(T/ha)
Comparaison entre les protections fongicide - 2022 - Variété tolérante - Bordeaux en Gâtinais
Rendement PV - coût fongicides (t/ha) Coût des fongicides (t/ha) IFT stratégie
14. A retenir
Arrachages
avant 15 oct
•Variétés sensibles
ou intermédiaires
3 T = Cu+ Triazoles
Arrachages
après 15 oct
•Variétés
tolérantes 2 ou 3
T = Cu/ Triazoles