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- Title
Indices and criteria for comparing the tolerance of strawberries to herbicides in dose-response experiments.
- Authors
Clay, D. V.
- Abstract
Three indices were used to assess the tolerance of strawberries to herbicides in different experiments. Tolerance was compared using a tolerance index, TI, (=ED value of the test herbicide/ED value of a standard herbicide). The degree of response to increases in dose was compared by calculating a dose-response index, RI (=ED50ED20 value) for each herbicide and the speed of action by a speed of action index, SI (=time to minimum ED value, test herbicide/time to minimum ED value, standard herbicide). The optimum time of the final assessment varied according to the mode of action of the herbicides being tested. There was generally good agreement between ED values obtained from scores of plant condition and from fresh weight measurements. ED20 values gave more useful estimates of relative tolerance than ED50's where the degree of response to increasing doses was different.
- Subjects
PESTICIDES -- Dose-response relationship; HERBICIDES; STRAWBERRIES; DOSE-response relationship in biochemistry
- Publication
Weed Research, 1980, Vol 20, Issue 2, p91
- ISSN
0043-1737
- Publication type
Article
- DOI
10.1111/j.1365-3180.1980.tb00050.x