Imidapro 4SC is a systemic product that you can use as a soil/root drench. Like all systemic products it will depend on the size of the tree, the level of moisture and the health of the tree to determine how long it will take the product to translocate through the tree. It could take a week or two for small to medium trees and several weeks for large trees.
You will use .1 fl oz (3ml) of Imidapro 4SC per inch of diameter of the trunk at breast height. You will mix the product into one quart of water per inch. For example: if the tree is 18 inches around (at chest height) divide by 3.14 to get the diameter = 5.73 inches. For this tree you will need to use .6 fl oz (18 ml) mixed in 5 quarts of water. We do recommend making sure the soil is moist prior to the application and that you keep the soil moist for at least two weeks after the applications to help increase translocation.
Once in the tree, Ambrosia Beetle is quite hard to treat for. We recommend to take down the trees that are already infected and chip them. Then you can protect the other trees by using a systemic product like Imidapro 4SC.
After doing some research with universities and their studies there are not a lot of options for controlling fire blight on pears. Most recommend using right at the beggining stages of growth and emergence in the spring to start spraying regularly with copper fungicides. Monterey Liqui-Cop or Bonide Liquid Copper Fungicide would be good foliar options for the blight. For the bugs since we dont know exactly what pest it is we cant say for certain the best product or application method for you to use. A general product you could go with that is safe for pears is Imidapro 4SC since it can be applied to pears for a variety of pests both as a soil drench treatment and as a foliar spray. Just be sure to follow instructions on the product label for reapplication intervals and dilution rates. We would also suggest contacting a local arborist to see if there are any measures others are taking more specific to your area for timing and control.
ImidaPro 4SC is one of the only products we have labeled for use on grape vines for leaf hoppers and should do a great job for you.
ImidaPro 4SC is really labeled for agricultural uses on a large scale so the label does not give a rate per gallon of water, only an amount per acre. What are you trying for?
You will use .1 fl oz (3ml) of Imidapro 4SC per inch of diameter of the tree trunk at breast height. You will mix the product into one quart of water per inch. For example: if the tree is 18 inches around (at chest height) divide by 3.14 to get the diameter = 5.73 inches. For this tree you will need to use .6 fl oz (18 ml) mixed in 5 quarts of water. We do recommend making sure the soil is moist prior to the application and that you keep the soil moist for at least two weeks after the applications to help increase translocation.
ImidaPro 4SC is labeled to treat termites that come across a treated surface. It can be applied to fruit trees for a variety of pests both as a soil drench treatment and as a foliar spray. Just be sure to follow instructions on the product label for reapplication intervals and dilution rates. We would also suggest contacting a local arborist to see if there are any measures others are taking more specific to your area for timing and control.