You should measure the height of the shrub (the length is not calculated). The mix rate is 0.1 fl oz to 0.2 fl oz of Dominion 2L Termiticide Concentrate per foot of shrub height as a drench around the base of the shrubs/bushes in no less than 10 gallons of water per 1,000 square feet. Direct application to the root area is best.
Dominion 2L is often used as soil drench application to the base/root zone of shrubs/trees to help with insects that do damage to the plant throughout the season such as whiteflies, aphids, borers, etc. and you would only need to do a single application to the roots of the plant per year.
We highly recommend to continue your trench of Dominion 2L Termiticide Concentrate next to your pony wall as well. This will give you a complete barrier for Termite Treatment and prevention.
We would recommend using Dominion 2L Termiticide Concentrate. It is labeled for use on trees for emerald ash borers as a preventative and a curative. Treatments should begin in May or June and should be done every year to protect trees from the Emerald Ash Borers. Most people use a 5-gallon bucket or a large watering can to apply Dominion as a soil drench. You will need 0.1 to 0.2 fl. oz. (3 to 6 mL) of Dominion 2L per inch of trunk diameter for trees. It is recommended that you use the higher rate for boring beetles. The amount of water that is used will vary depending on soil conditions and volumes that are easy for applicators to use. The minimum amount of water that should be used is 1 pint per inch of trunk diameter for trees but you may use 1 quart -1 gallon of water per inch of trunk diameter for trees. Denser soils such as clay do not accept water as readily, so the lower volume of water is suggested. Since sandy soils can accept more water, using the higher volume of water is preferred. After the soil drench has been applied you should water it in with at least 1/2 inch of water. Note: Water simply acts as a carrier and it is important that even distribution of the product is achieved. Thus, more water may be used if the applicator feels runoff will not occur and proper penetration of the root zone is achieved. Insecticides applied to the soil are taken up by the roots and translocated throughout the tree or shrub. Root/soil drenches offer the advantage of requiring no special equipment to apply (other than a bucket or watering can). However, surface layers of organic matter, such as mulch or leaf litter, can bind the insecticide and reduce uptake. Before applying drenches, it is important to remove or pull back any mulch or dead leaves so the insecticide solution is poured directly on the mineral soil. It is also important to keep the soil around the tree or shrub moist for the next 10-14 days after applications to encourage uptake.
The Dominion 2L can be used as a systemic application to roses and other plants for thrips and it would do a great job. If you have a heavy population of them though, you may find that you need to do a foliar application to the buds while the systemic makes its way through the plant to eliminate them and protect them for the rest of the season. Products like Talstar P are often used in this instance to spray where they are currently damaging the plants and provide residual control for a month or so on the surface. If you use the Dominion, you would apply at the rate of 0.2-0.4 oz per foot of shrub height in roughly 1-2 gallons of water based on your rose bush size.