The Evergreen Pyrethrum Concentrate is ONLY a contact kill and will not provide any residual which is what you need for flea and whitefly control. If you are having a problem with whiteflies on a tree, you would want to use something like
Dominion 2L. This product is one that only requires a tiny amount of product to work, and you would use it as a soil drench around the base of whatever tree or shrub the whiteflies are on as long as it is not a tree which produces food you plan to consume. The
Dominion will be soaked up through the root system of the tree and treat the tree from the inside out to get rid of the whitefly and will stay in the tree for up to 1 year. For Flea Control outdoors you would want to use
Talstar and
NyGuard IGR. The
Talstar is the liquid insecticide you would use to kill the adults and the
NyGuard is the birth control that keeps the larvae from growing into reproducing adults as well as halting reproduction in the adults. The birth control is one of the biggest factors in control the fleas. Keep your grass very short and dry as this makes it harder for the fleas to thrive on your property. If you have pets make sure they are on a flea preventative to keep the number being brought into your home at a minimum. For inside the home use
NyGuard Plus to spray down all floors, furniture, pet bedding and areas where the fleas are present. This is an aerosol so no mixing is needed and is easier for indoor applications and it has the birth control and insecticide built into the can together. Vaccuuming is going to be key indoors to control the fleas as well and you can review our article on
How To Get Rid Of Fleas Indoors for further tips. All of these products are safe when used according to the label and you would simply keep pets and children out of the area you are treating until it has dried.