Ideally the animals should not graze the pasture for more than three days, but this is not always practical. In these are as there is usually sufficient soil moisture or follow up rains after hay making to allow the ryegrass to produce enough viable seed for the following year. This enables the ryegrass to re-establish itself quickly and compete with volunteer grasses. Pests African black beetle has been a problem for ryegrass establishment in the Busselton-Vasse area, where there have been large numbers of the beetles. The withholding period is two days for grazing and ten days for haymaking.
Pasture loopers can also cause a problem if they are present in large numbers in pastures.
Heavy infestations of redlegged earth mite has caused major problems for the clover and attacked Concord ryegrass. The new varieties of ryegrass are more tolerant to rust infection. If rust is evident, heavy grazing will reduce the source of further infection. Its availability does not imply suitability to other areas, and any interpretation or use is the responsibility of the user. Mention of product or trade names does not imply recommendation, and any omissions are unintentional.