Controlling Offsite Movement of Agricultural Chemical Residues: Winegrapes

Abstract

Residues: WinegrapesT his publication provides winegrape growers with information on farming practices that can help reduce the occurrence of organophosphate and synthetic pyrethroid pesticides in surface water, including streams, lakes, ponds, rivers, and drainage ditches. It describes the current regulatory approach to surface water protection; gives background information on the safe and effective use of pesticides, integrated pest management, and handling runoff water; and demonstrates a self-assessment of the potential risk of offsite pesticide movement using flowcharts for specific management practices and field conditions in winegrapes. The risk self-assessment focuses on issues that affect either the number of pesticide applications containing certain active ingredients or the offsite movement of pesticides as drift, attached to sediment, or in water. The publication concludes with research-based management practices that mitigate the risk that pesticide residues will leave the site of application and enter surface water.

Impact of Deficit Irrigation on Grapevine cv. ‘Touriga Nacional’ during Three Seasons in Douro Region: An Agronomical and Metabolomics Approach

“…Precipitation was subtracted from ET c each week, and the calculated amount of water required was applied the following week. The constant Kc was chosen from previous studies, considering the months where irrigation occurred, the vineyard characteristics, and the values described in the literature [ 69 ]. Irrigation started when values of pre-dawn leaf water potential (Ψpd) reached ca.…”