Canada to extend clothianidin approval
The Canadian Pest Management Regulatory Agency (PMRA) proposes to renew the conditional registration of Sumitomo Chemical subsidiary Valent Canada’s neonicotinoid insecticides, Clutch 50 WDG and Arena 50 WDG (both clothianidin). They were approved in 2009 for use on potatoes, grapevines, pome and stone fruit, and turf. The registrations were conditional on the supply of additional data by December 2012. They included a lysimeter study in coarse-textured soil, a study of behaviour and fate of clothianidin in plants, including concentrations in nectar and pollen, and a hive study to assess chronic toxicity to bees. Studies must now be submitted by December 2015. The PMRA is reviewing the risks posed by clothianidin and two other neonicotinoids to bees and other pollinators ( Agrow No 643, p 13).