Persistence and Penetration of Monuron in Asparagus Soils

Rahn, E. M.; join(, Robert E. Baynard

doi:10.2307/4040238

Cited by 8 publications

(2 citation statements)

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“…The root mat was then placed in direct cantact with the soil to be bioassayed and the vegetative matter produced was used as a measure of the amount of the nutrient element in the soil. Bioassays have been used in studying herbicide residues by employing a sequential cropping technique (14,17).…”

Section: Introductionmentioning

confidence: 99%

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A Study of Soil Bioassay Technique Using Prometryne

1971

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A cooperative study to evaluate the accuracy and precision of bioassays was carried out among investigators at several locations for 3 years. Oats (Avena sativaL., var. Cimarron) seedlings were used as indicator plants for soil-applied 2,4-bis-(isopropylamino)-6-methylthio-s-triazine [prometryne]. Assay results varied a great deal initially, and ranged from 147% below to 234% above the prometryne actually applied. The adoption of uniform conditions and procedures greatly increased the uniformity of the determinations between locations to a range of from 37% low to 0% high in prometryne applied. Chemical analyses of the soils ranged from 13% low to 20% high. Measurements of herbicidal activity included dry and fresh plant weights, plant height, visual injury ratings, and plant water use. The average concentration of prometryne in the soil as estimated with several types of measurements gave a much better measure of prometryne content than any one measurement alone. Prometryne rapidly and greatly affected the utilization of water by oats seedlings and careful measurement of water use showed potential of being a good early indicator of prometryne activity.

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Section: Introductionmentioning

confidence: 99%

“…Of particular interest is its possible use as a preemergence and postemergence treatment for control of quackgrass (Agropyron repens (L.) Beauv.) (4,14).…”

Section: Introductionmentioning

confidence: 99%