They also fight timothy in their pastures and struggle with a variety of noxious weeds such as scentless chamomile, caraway, tansy, thistles and leafy spurge.
Sachets with dried moth-repellent herbs like wormwood, southernwood, costmary, lavender, pennyroyal, lemon verbena rosemary, rue, sage and tansy are called moth bags.
Coriander and tansy leaf are known to be particularly attractive to many species of adult hoverflies which feed on large quantities of pollen of these plants.