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Survey of Scottish Winter Oilseed Rape Cultivation 2014/15: Impact of Neonicotinoid Seed Treatment Restrictions

Survey of Scottish Winter Oilseed Rape Cultivation 2014/15: Impact of Neonicotinoid Seed Treatment Restrictions

Wednesday, February 17, 2016

ISBN: 9781786520203

This publication presents information from a survey of Scottish winter oilseed rape growers. The survey was conducted to inform the Scottish Government about the impact of the first year of the EU restrictions on use of neonicotinoid seed treatments.

Executive Summary

This publication presents information from a survey of Scottish winter oilseed rape cultivation. The crops surveyed were sown in 2014 and harvested in 2015 and were the first sown since the implementation of EU restrictions on the use of three neonicotinoid insecticides (clothianidin, imidacloprid & thiamethoxam). Data were collected from a sample of farmers collectively growing 16 per cent of the 2015 Scottish winter oilseed rape crop.

Whilst the absence of neonicotinoid seed treatments made the control of autumn insect pests more challenging for some growers the impact of the restrictions appears to be less severe in Scotland than has been encountered in England. This may be influenced by lower pest pressure due to cooler climatic conditions and also potentially by lower resistance rates. A further survey is being conducted during the second year of the restrictions.