Defra - Department for Environment, Food and Rural Affairs.

Science Search

Science and Research Projects

Return to Science Search homepage   Return to Project List

Biology and control of weeds and volunteer oilseed rape in broad-leaved crops - AR0210

Description


The aim of this programme is firstly to build on the achievements of ROAME AR0208, to increase understanding of the effects of weeds on broad-leaved crops, particularly, oilseed rape, field beans and linseed. Secondly, it will continue to improve understanding of the biology of volunteer oilseed rape, extending work initiated in ROAME AR0 126. This work will provide improved guidance on how to optimise weed control practices, thus meeting MAFF’s objectives of reducing herbicide use and enhancing the competitiveness of UK agriculture.

The proposed work falls into three categories:

a) Studies to increase knowledge of how different weed species affect winter oilseed rape, winter linseed, winter linseed and spring field beans, and how it is possible to manipulate crop husbandry to reduce the need for weed control. This work will include studies using herbicide resistant oilseed rape to explore aspects of week control in rape previously not amendable to investigation in other ways.

b) specific studies to develop on farm predictive systems of weed management, using spring field beans as a model crop.

c) investigations of the factors controlling longer term persistence of volunteer oilseed rape and of the importance of varietal differences in determining the longevity of rape seed in the soil.



Objective
1) Understanding the responses of broad-leaved crops to weed competition
The section of the programme will aim to establishreliable data bases on the sensitivity of winter oilseed rape, winter linseed and winter lupin to competition from the major arable weeds. It will include studies of multiple weed competition and the effects of crop agronomy on weed competitiveness.
The work will also utilise the wider weed control window provided by herbicide resistant rape to investigate the benefits of control of weeds currently hard to control and to establish the effects of delayed broad-leaved weed control on crop yield.

2) Production of yield response
The long trem aim of this work is to develop sound methods for predicting yield responses to weed competition. Work in this part of the programme will concentrate on methods of weed assessment and on factors that may cause deviation from the expected yield loss, using spring beans as a model crop.

3) Biology of volunteer oilseed rape
It is important to have a full understanding of the biology of oilseed rape, to establish effective management strategies for this weed. The objective of this part of the programme is to determine the factors controllinf the onset of dormnacy and longer term seed persistance, concentrating on varietal differences in dormancy and on the long term decline of seeds in soil.
Project Documents
• Final Report : Biology and control of weeds and volunteer oilseed rape in broad-leaved crops   (955k)
• Final Report - Annex : Biology and control of weeds and volunteer oilseed rape in broad-leaved crops   (8k)
• Final Report - Annex : Biology and control of weeds and volunteer oilseed rape in broad-leaved crops   (7k)
Time-Scale and Cost
From: 1997

To: 2001

Cost: £330,828
Contractor / Funded Organisations
Rothamsted Research (BBSRC)
Keywords
Arable Farming              
Crops              
Farming              
Oilseed Rape              
Weed Control              
Fields of Study
Arable Crops