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To determine the effect of strategies of herbicide use on the sensitivity of weed populations in field vegetable crops - HH2009SFV

The implications of using reduced herbicide rates in terms of increasing herbicide tolerance among susceptible weed species will be assessed by :
(i) monitoring weed survival in a natural weed population following annual applications of reduced doses of selected pre- and post-emergence herbicides in the field.
(ii) selecting from the surviving weeds, the best represented of the horticulturally important weed species in the naturally-occurring populations at the two sites, and collecting and storing seed from treated and untreated plots for further investigation.
(iii) comparing patterns of weed seedling emergence in the field from untreated plots and from plots where weed has been treated with reduced doses of herbicide, and the survivors allowed to set and shed seed.
(iv) determining the susceptibility of naturally-occurring populations of horticulturally important weed species to different doses of the selective herbicides, and comparing the susceptibility of progeny from surviving herbicide treated plants with that of progeny from the untreated population.
Time-Scale and Cost
From: 1996

To: 1999

Cost: £167,925
Contractor / Funded Organisations
Horticulture Research International
Fields of Study