Presentation on theme: "EWRS Joint Workshop. 4-8 September Huesca, Spain"— Presentation transcript:
1 EWRS Joint Workshop. 4-8 September 2011. Huesca, Spain Paper mulch controls purple nutsedge (Cyperus rotundus L.) in processing tomatoA. Cirujeda1, J. Aibar2, C. Zaragoza11Unidad de Sanidad Vegetal, Centro de Investigación y Tecnología Agroalimentaria (CITA), Zaragoza;2Universidad de Zaragoza. Escuela Politécnica Superior HuescaHuesca, September 7th, 2011
2 Cyperus rotundus L. is considered one of the world’s worst weed.
3 Despite its low size, this species can cause a reduction of up to 28% in the development of tomato (Morales-Payan et al., 2003).
4 CYCLE OF CYPERUS ROTUNDUS L. in the North of Spain (continental area) SHORT DAY9hLONG DAY12hLIGHT TªLIGHT TªLIGHT TªTª>20ºCTª<5ºCTª>15ºCnon- viable seeds21A21J21S21D21ASPRINGSUMMERAUTUMNWINTERCYCLE OF CYPERUS ROTUNDUS L. in the North of Spain (continental area)
5 Cyperus rotundus infestation in a commercial farm without mulch.
6 IX Congreso SEAE: Calidad y Seguridad Alimentaria Plastic mulch with black polyethylene (PE) is generally used in extensive horticultural crops in north-eastern Spain, like in tomato.
9 ObjectivesIn this work we present the effect of some types of paper used in tomato crop infested with C. rotundus during five years.
10 Material and methods Trial Year Material Company Colour Weight (gm2) Material and methodsTable 1. Description of the treatments.TrialYearMaterialCompanyColourWeight (gm2)AllUntreated control-PESolplastBlack16.4Mater-Bi1Novamont22.3Aula Dei2005, 06Saikraft 2002, 3SaicaBrown200Aula Dei, S. Bruno2007, 08Saikraft 1402, 3140S. Bruno2008, 09Mimgreen2Mimcord902009, 10Karpan Liner2Smurfit-Kappa120MG2501Biodegradable plastic2Paper3Paper coated on one side with an estiren-acrylate copolymer at 150 g/t.
16 ResultsPaper mulch does not prevent Cyperus emergence but as far as it stands the physical pressure and does not break, the plants are not able to reach the light, develop chlorotic leaves, do not flower and die.
19 ResultsDrawbacks: If rainfall is frequent, the paper becomes soft and do not dry and the control effect on Cyperus is not reached (Méndez et al., 2006 Northern Spain). This can also happen if the irrigation emitters are placed upwards and the paper is continously wet.Another unconvenient of paper mulch is that in clay soils the degradation of the underground part of the paper mulch may be quite fast and the paper breaks down in the contact line of the mulch with the soil surface allowing the wind to damage it.
21 ResultsTomato yield at the paper mulch treatments was very similar to that obtained in the PE all 5 years of experiments.
22 Economic aspects Mulching type €/kg* g/m2 €/ha** % Coments Black PE 15 µ1.8516.4202100Add aprox.150 € removal cost.Saikraft 125 recycled Paper Saikraft 140 recycled Paper0.470.46125140391429193212Shorter rolls for same weightMaterBi (biodegradable plastic)15µ4.7522.3706350-Biofilm (biodegradable plastic) 17µ5.821818404Black Paper Mimcord 135µ1.590.3903446Good installation. Shorter rolls for same weight*It does not include installation. Prices in Spain, 2010**2/3 field area covered (1,50m between rows, 1,20m mulch width)
23 ConclusionsPaper mulch is an efficient weed control method including Cyperus spp. unless the mulch is not under continous moisture conditions.Another advantage is the complete degradation of the paper after burial.The main constraints compared to PE is the price (nowadays), the slower installation and the heavier weight of the rolls.
24 EWRS Joint Workshop. 4-8 September 2011. Huesca, Spain Thanks for your attention!