Assessing yield losses caused by the harvester ant Messor barbarus (L.) in winter cereals
MetadataShow full item record
Harvester ants from the species Messor barbarus (L.) are important seed predators in semi-arid cereal fields of NE Spain, and can contribute substantially to weed control. However, occasionally they harvest newly sown crop seeds at sowing in autumn, or ripe cereal grains close to harvest in summer, causing yield losses. A preliminary study was conducted in 34 commercial winter cereal fields to measure yield loss, and to identify factors that influence it. The area affected by ants was measured ten days prior to the anticipated harvest date. Ant colony size, nest density, crop height, weed densities and temperatures at sowing were assessed. At sowing, harvester ants did not cause yield losses (0.2% of potential yield on average). At harvest, yield losses were generally low as well (0.6%) although occasionally higher losses were recorded (max. 9.2%). Yield losses significantly increased with increasing nest density, nest size and with number of years of no-till. The results of this study show that in 2009 yield losses caused by M. barbarus were insignificant and more than offset by the benefits provided by the destruction of weed seeds.
Is part ofCrop Protection, 2011, vol. 30, núm. 9, p. 1144-1148
European research projects
Showing items related by title, author, creator and subject.
Harvester ant (Messor barbarus (L.)) density as related to soil properties, topography and management in semi-arid cereals Baraibar Padró, Bàrbara; Torra Farré, Joel; Westerman, Paula Renate (Elsevier, 2011)Harvester ants are important weed seed predators in semi-arid cereal fields. Densities of harvester ants vary considerably across fields and so do concomitant weed seed predation rates, however, causes for variability are ...
Baraibar Padró, Bàrbara; Torra Farré, Joel; Royo-Esnal, Aritz; Recasens i Guinjuan, Jordi; Comas Rodríguez, Carles (Elsevier, 2018-09-17)Nest densities of harvester ants (Messor barbarus) are high in rain-fed cereal fields in north-eastern Spain where the ants remove large quantities of seeds, contributing to reductions in weed populations. The distribution ...
Spatial and temporal stability of weed patches in cereal fields under direct drilling and harrow tillage Izquierdo i Figarola, Jordi; Milne, Alice; Recasens i Guinjuan, Jordi; Royo-Esnal, Aritz; Torra Farré, Joel; Webster, R. (Richard); Baraibar Padró, Bàrbara (MDPI, 2020-03-25)The adoption of conservation agriculture (CA) techniques by farmers is changing the dynamics of weed communities in cereal fields and so potentially their spatial distribution. These changes can challenge the use of ...