A good product to broadcast across your lawn is called Bifen I/T. It treats for various types of pests and can be used both inside along the baseboards, cracks and crevices and outside as well as a broadcast across the lawn. It is safe for pets when it is dry so remove the dogs from the area while spraying. This product is not labeled for fruit trees.
For fruit trees, I would recommend Monterey Fruit Tree Spray Plus. It is broadly labeled product that can be used on edibles.
We would not recommend mixing Bifenthrin and Permethrin together. The Bifenthrin mixed with an IGR is effective as well as mixing Permethrin with an IGR, such as NyGuard. Nyguard does have a residual for 4-5 months. With fleas, keep in mind that multiple applications are needed for them to be eradicated. After the first application, a follow up treatment should be done every 14 days until the fleas are gone.
Yes, we do have products that are comparable to Diazinon since it has been outlawed due to safety regulations. We would recommend Bifen IT. It is great for indoor and outdoor use. Indoors, you will spray along the baseboards and cracks and crevices. It lasts for 90 days. Outdoors, you can broadcast across your lawn, spray along the perimeter of your home, on flowers and also ornamentals. This lasts for 30 days outside. This product is not labeled to be sprayed on edibles. It is labeled for ticks, mosquitoes and various other pests as well.
If you have any questions, please do not hesitate to ask.