WZBY7UW3

2701

15 janvier 2021 10:05

15 janvier 2021 10:05

Galinsoga quadriradiata and Galinsoga parviflora are very troublesome weeds in many organic vegetable crops in Europe. A very straightforward method to keep Galinsoga infestations under control is by targeting the Galinsoga seedbank. To identify cropping systems able to reduce the seedbank size in vegetable-based cropping systems, the relationships between the seedbank size of Galinsoga species and prevailing soil/crop management practices and pedo-hydrological conditions were investigated. Hereto, the seedbank of the 0–20 cm topsoil layer was sampled in 50 organic vegetable fields and analysed according to the seedling emergence method. Field history data were collected for the past 5 years, and physical, chemical and microbial soil quality was determined. Galinsoga quadriradiata was the most frequent and abundant Galinsoga species in the weed seedbank. The genus Galinsoga was present in 90% of the soil weed seedbanks of organic vegetable fields but displayed wide variation in abundance. Smallest Galinsoga seedbanks were found in fields that were predominantly tilled with non-inversion implements or rotationally ploughed, and continuously cropped with competitive crops during the entire growing season (April 15-November 15). Contrary to G. quadriradiata, seedbank size of G. parviflora was closely related to soil organic carbon content and sand fraction. Remarkably, soils with a low level of easily plant-available phosphorus and concomitant high activity of arbuscular mycorrhizae had smaller G. quadriradiata seedbanks. To reduce Galinsoga infestations, fields should preferably be tilled without soil inversion, fertilised with organic amendments with low content of readily plant-available phosphorus and cropped with competitive crops all season long.

None

• AB - Spécifique
• FREDO adventice
• FREDO biologie et travail du sol
• FREDO lutte
• GEO Europe
• GEO Royaume-Uni

• competition
• cropping sequence
• organic manure type
• preventive weed control
• soil quality
• tillage type

Weed Research

n/a

14/12/2020

14 décembre 2020

https://doi.org/10.1111/wre.12457 Le DOI est une URL unique de référencement d'une publication. Il est donc plus fiable et permanent qu'une URL classique

1365-3180 L’ISSN est un code de 8 chiffres servant à identifier les journaux, revues, magazines, périodiques de toute nature et sur tous supports, papier comme électronique.