Weeds after natural disasters
When drought occurs:
- new weeds can be introduced in feed and fodder
- herbicide resistant weed seeds can be introduced in feed and fodder
- weed seed viability can be prolonged by the dry conditions
- existing vegetation can be devastating which subsequently reduces competition with weeds, and can favour the quick establishment of weeds when conditions improve
- drought causes mineralisation of nitrogen in the soil, and newly germinated weeds can take advantage of these nutrients
- increased livestock movement, to and from agistment, or purchased livestock for restocking a property, can increase the risk of weeds being introduced as their seed can remain viable after passing through the gut.
Feed and fodder
When buying feed and fodder the following steps:
- know where your feed and fodder has come from and what it is made up of can help manage any potential biosecurity risks
- restrict feeding areas as much as possible
- monitor feeding points and water points for germination of suspect weeds
- control weeds quickly after germination
- identify new or unknow plants.