David Hansson &Sven-Erik Svensson Swedish University of Agricultural Sciences, Alnarp

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson &Sven-Erik Svensson Swedish University of Agricultural Sciences, Alnarp Effect of flame weeding at different time intervals before crop emergence

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson Project: Effective weed management in row- grown organic vegetables Participatory research The experiments were designed and analysed etc. after a discussion with: farmers, advisers and researchers The experiments were performed on 3 different farms

Participatory research Exchange of experience between farmers, advisers and researchers. Participatory research gives more solutions and faster changes. Present issues are in focus which gives a greater engagement. Participatory research involves a holistic approach to solve problems. The hole group is responsible to ask questions, analyse and participate. David Hansson & Sven-Erik Svensson Swedish University of Agricultural Sciences, Alnarp

Område Jordbruk - odlingssystem, teknik och produktkvalitet Weed management system Time False seedbed Seedbed preparation False seedbed Sowing Delayed sowing Flame weeding Emergence

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson Organic grow carrots

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson

Experimental plan Experimental treatments, flame weeding: 2 days before (beginning) emergency 1 day before emergency 0 day at emergency 2 days after emergency Untreated control (unflamed) David Hansson Swedish University of Agricultural Sciences, Alnarp

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson Picture 31 May, 2&1 days before flaming

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson Picture 31 May, 1&5 days before flaming

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson Assessment 20 June, a few days before hand weeding

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson Unflamed control

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson Flame weeding 2 days before beginning emergency

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson Flame weeding 1 day before beginning emergency

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson day at beginning of emergency

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson days after beginning emergency

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson Hand weeding 29 days after drilling, no. carrots at the time of flaming

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson One day postponed flaming resulted in; 10 % increased weed control effect, h per hectare reduced need for hand weeding.

Område Jordbruk - odlingssystem, teknik och produktkvalitet

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson Assessment 26 June Weed number a few days before hand weeding

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson Weed number a few days before hand weeding If flaming before crop emergence was delayed by; 3 days, the amount of weeds at the time of hand weeding was reduced by half. 2 days, the amount of weeds at the time of hand weeding was decreased by one-third.

Område Jordbruk - odlingssystem, teknik och produktkvalitet David Hansson