Why is it a problem?
In favourable conditions, Ageratum conyzoides can carpet soil, often resulting in the displacement of crops. It is often found as part of invasive flora, which competes with arable crops, such as rice and maize. It is also a host plant of significant pathogens and nematodes, which can cause infection in crops like potato and banana.
- Displaces crops
- Host plants to pathogens and nematodes
- Loss of land
- Reduces native biodiversity
- Negatively impacts livelihoods
What’s the solution?
Short periods of flooding provide effective control in Eucalyptus plantations in India. In field crops in the dry tropics, the density of the weed is reduced by minimum tillage systems.
Ageratum conyzoides is shallow-rooted and relatively easy to control using mechanical means. As it is a prolific seeder, it is important to destroy plants before they flower.
A variety of herbicides have shown to be effective in protecting crops like maize, soyabean and tea from Ageratum conyzoides.