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Dose response relationship of droplet applications for the leaf-specific weed control in vegetable crops

Koukiasas, N., Yu, T. and Murdoch, A. (2016) Dose response relationship of droplet applications for the leaf-specific weed control in vegetable crops. In: Proceedings of International Advances in Pesticide Application, January 13-15, 2016, Barcelona, pp. 343-348.

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Abstract/Summary

As a prelude to leaf-specific weed control using droplets targeted by a robotic weeder, amounts of herbicide required to control individual weed seedlings were estimated. Roundup Biactive was applied at doses equivalent to 1/128th to four times the recommended rate in addition to undiluted Roundup and water controls. Based on the mean ground cover of the seedlings, the recommended dose (1.5 l ha 1) was estimated and droplets were applied to individual plants by micropipette. All treatments contained 1% AS 500 SL, Agromix (adjuvant). Three weeks after application dry weights (DW) of each seedling was recorded. DW reductions of 50% were achieved in the five species tested at less than the recommended rate whereas only in one species was a 90% reduction obtained at that rate. In Galium aparine for example, 19.3 μg of glyphosate reduced DW per plant by 90% compared to the recommended dose of 8.4 μg.

Item Type:Conference or Workshop Item (Paper)
Refereed:Yes
Divisions:Interdisciplinary centres and themes > Centre for Food Security
Faculty of Life Sciences > School of Agriculture, Policy and Development > Biodiversity, Crops and Agroecosystems Division > Crops Research Group
ID Code:53019
Uncontrolled Keywords:leaf-specific weed control, droplet application, dose-response, glyphosate, vegetables
Publisher:Association of Applied Biologists

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