• 4 experiments: 55 species and varieties • 2 years : 2016, 2017
• 3 sites in Reunion Island:
La Mare, Bassin Plat, Colimaçons • 4 experiments: 55 species and varieties
• 2 years : 2016, 2017
• 3 sites in Reunion Island:
La Mare, Bassin Plat, Colimaçons
Crop cover selection to improve weed
control in sugarcane agrosystems
in Reunion Island
Context
:
• Cover crops are increasingly used for weed management in tropical regions as an alternative to herbicide.
• Selecting the most suitable species of cover crop to be associated with a main crop requires long-term trials.
High potential to limit weeds below the 30% threshold.
Objectives: to assess the ability of various cover crops to limit weed growth in Reunion Island
CHRISTINA Mathias1, MARNOTTE
Pascal1, BENARD Renaud1,2,
COURTOIS Julie1, MARIN Yoann1, VIRAMA LATCHOUMY Mickaël1,
CHABANNE André1
1CIRAD, UPR AIDA, Sainte-Clothilde, La Reunion, France
2eRcane, Saint-Denis, La Reunion, France
mathias.christina@cirad.fr
Collection experiments : to assess the life cycle of cover crops
• 4 trials: 55 species and varieties • 2 years : 2016, 2017
• 3 sites in Reunion Island:
La Mare, Bassin Plat, Colimaçons
Pennisetum Glaucum (millet)
Cajanus Cajan (pigeon pea)
Improved fallow, 3 mths to 1 yr (e.g. millet)
Short rotation (2-3 mths), intercrop
(e.g. Vigna, Guizotia)
Cover crop mixture with short life cycle, intercrop
(e.g. Canavalia)
Large plot experiments : to limit weed growth
• 4 trials : 10 species • 2 years : 2016, 2017
• 2 sites : La Mare & Bassin Plat
• Coverage after 60 days of growth
Growth under shading
• AGRITERRA trial: 16 species, 2018 ISSCT 3rd workshop,
September 24th-28th, La Reunion
Perspectives: sugarcane association
• CanécoH project: eRcane (2014 – in progress)
• SALSA – FertiCannes :
Design: sugarcane & legumes (Jack bean) association Objectives: to assess the nitrogen intakes by legumes
• 4 experiments: 55 species and varieties • 2 years : 2016, 2017
• 3 sites in Reunion Island:
La Mare, Bassin Plat, Colimaçons
To assess the optimal sowing date
• 1 trial: 16 species, 2018
• 1 site : La Mare, 3 planting dates
• Aboveground dry biomass after 3 months of growth
