The ragwort species common or tansy ragwort (Jacobaea vulgaris, formerly Senecio jacobaea), marsh ragwort (S. aquaticus), Oxford ragwort (S. squalidus) and hoary ragwort (S. erucifolius) are native in Europe, but invaded North America, Australia and New Zealand as weeds. The abundance of ragwort species is increasing in west-and central Europe. Ragwort species contain different groups of secondary plant compounds defending them against generalist herbivores, contributing to their success as weeds. They are mainly known for containing pyrrolizidine alkaloids, which are toxic to grazing cattle and other livestock causing considerable losses to agricultural revenue. Consequently, control of ragwort is obligatory by law in the UK, Ireland and Australia. Commonly used management practices to control ragwort include mechanical removal, grazing, pasture management, biological control and chemical control. In this review the biology of ragwort species is shortly described and the different management practices are discussed.

中文翻译：

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控制豚草种类的管理实践。

常见或艾菊类豚草（Jacobaea vulgaris，前身为 Senecio jacobaea）、沼泽豚草（S.aquaticus）、牛津豚草（S. squalidus）和白蒿（S. erucifolius）原产于欧洲，但入侵北美、澳大利亚和新西兰作为杂草。西欧和中欧的豚草种类越来越丰富。豚草种类含有不同组的次生植物化合物，保护它们免受一般食草动物的侵害，有助于它们作为杂草的成功。它们主要以含有吡咯里西啶生物碱而闻名，这种生物碱对放牧的牛和其他牲畜有毒，导致农业收入的相当大损失。因此，英国、爱尔兰和澳大利亚的法律强制要求控制豚草。控制豚草的常用管理方法包括机械移除、放牧、牧场管理、生物防治和化学防治。在这篇综述中，简短地描述了豚草物种的生物学，并讨论了不同的管理实践。