How to stop the particle effect after a while

[Therese31529828or8m]

Hi

Im making falling leaves in after effect with the particle world effect. 

I have made a compisition that gradualiy showing falling leaves but i want the leaves to stop comming down after a while? 

How do i stop the particle flow?

Thank you have a good friday 

[Kyle Hamrick]

Keyframe the Birth Rate setting and change it from [your value] to 0 when you want it to stop producing particles.

[Rick Gerard]

If you are using CC Particle World, animate the birth rate from the original value to zero, make the longevity equal to the duration of the layer, adjust the floor position, and change the Floor Action to glue.