How do you get rid of black fly larvae that is in a back yard waterfall?

Answer by  mollymay318 (49)

The best thing to do is to try and amp up the pressure of the water to keep the larvae from gaining the oxygen necessary for their development and survival.

Answer by  saturno (325)

If the water of the waterfall is recirculating you can add a low dosis of some organic insecticide, if the pest is around the water you can spray it directly

Answer by  Redhdz (527)

BTI, Bacillus thuringiensis subspecies israelensis. Will kill black fly larvae before they mature into adults. Mosquito Dunks, are donut-shaped cakes with 10% concentrations of BTI. It is a larvicide that works up to 30 days. You just drop the in your water. They are available at places like Home Depot or Ace Hardware. And they really work, I've used them.

Answer by  melissa23 (1002)

You need to take a net and scoop out all of the larvae. Also, you need to go to the store and buy some insectiside to prevent future infestation, sprinkle it in the waterfall. If that does not work, you should call an exterminator to see if he can get rid of the eggs.

Answer by  BrendaG (6111)

A black fly needs moving water in order for it to complete its life cycle. Outside foggers and insecticides provide temporary solutions. Those with pyrethrine-based ingredients are ok to use without harming people, pets, or the environment. BTI Dunks can safely be used when put into the water in those areas you want to eliminate flies from.

Answer by  Creedr (73)

You can get rid of black flies by clearing brush and debris from a nearby stream. Black fly larvae not only require moving water, but they also require objects in the water to attach themselves to.