Control zone vis-à-vis the root chrysomele of corn in Eure-et-Loir (28)

Limits of the control zones against the spread of chrysomele, a beetle pest with compulsory control of maize crops. They are determined, by prefectural decree, on a case-by-case basis and in each area concerned by the discovery of chrysomèle during summer trapping campaigns. Within each control zone, three ‘sub-areas’ are distinguished, namely:- a focal zone, whose limit is one kilometre from the field where maize chrysomele specimens have been caught, within which the use of insecticides and crop rotation are, among other measures, mandatory;- a safety zone, whose outer limit is five kilometres from that of the focus zone and within which the pest control, mandatory, either by crop rotation or by application of insecticides;- a buffer zone, whose outer limit is 34 kilometres away from that of the safe zone and where crop rotation is recommended.针对玉米作物实施强制防控的甲虫害虫chrysomele的扩散防控管控区范围，由各省政令根据具体个案，并结合夏季诱捕监测中发现chrysomele的相关区域逐一划定。 每个管控区内划分为三个"sub-areas"，具体如下： - 核心区（focal zone）：其边界距捕获玉米chrysomele标本的田块1公里范围以内，该区域内需强制实施包括杀虫剂施用与作物轮作在内的多项防控措施； - 安全区（safety zone）：其外边界距核心区外边界5公里，该区域内需通过作物轮作或施用杀虫剂实施强制害虫防控； - 缓冲区（buffer zone）：其外边界距安全区外边界34公里，该区域仅推荐实施作物轮作防控措施。