Yes, Gly Pho-Sel Pro 41% with Surfactant should be diluted with water. You will mix 1-2 oz. per gallon of water to control most annual weeds or use 2-4 oz. to control tougher or hard to kill perennial weeds. Please refer to product label for complete use instructions.
Neither Drive nor MSMA are actually labeled to control centipede in bermuda grass. The best thing to do in your case would be to spot treat with a glyphosate based product such as Gly-Pho-Sel Pro and then replant the bermuda in those areas.
Gly Pho-Sel Pro cannot be used on desirable trees because severe damage or destruction may occur. You can use the product around the tree to kill weeds.
Gly Pho-Sel Pro 41% with Surfactant should be applied when the animals are not present and they can return once the surfaces have completely dried.
Gly Pho-Sel Pro 41% with Surfactant treated areas can be reseeded 2 weeks after application.
Unfortunately there is not an herbicide available that would remove the poison ivy from around blue rug juniper that would not also potentially harm it. The best thing for this area is wear gloves and carefully hand pull the poison ivy or you can carefully spot treat with a glyphosate based product such as Gly Pho-Sel Pro 41% with Surfactant, avoiding contact with as much of the juniper as you can.
If you mixed 2.33 fl oz of Gly Pho-Sel Pro 41% with Surfactant to one gallon of water this should treat 1,000 sq ft.
Yes, Gly Pho-Sel Pro is labeled for poison ivy and poison oak.
Unfortunately, Johnson grass and Orchard grass are both perennial grasses. Therefore, we are unaware of any selective herbicide that would kill the Johnson grass and not harm the Orchard grass. In this instance we would recommend spot treating the Johnson grass with a non selective glyphosate herbicide such as Gly Pho-Sel Pro with 41% Glyphosate and reseeding. Please be sure to read the product label for complete use instructions before use.