Knowledgebase
use of Safari 20 SG insecticide for Hemlock wooly adelgid #785325
Asked March 28, 2022, 12:59 PM EDT
Allegan County Michigan
Expert Response
To protect hemlock trees from Hemlock Wooly Adelgid using this product, I will refer you to page 15 of the product label (see attached). This page contains the instructions for basal trunk sprays. You will need to calculate the cumulative trunk diameter. Cumulative trunk diameter is just the sum of the diameter of the trunks on all of the trees that you are treating. This is only concerned with the portion of the trunk that falls within the space from the soil surface to 4-5 feet above the soil surface. If your tree splits above the 5 ft. mark, then you do not need to factor in the diameter of the separate trunks above the split. If they split below the 5 ft. mark, then you should add together the diameters of the two trunks to arrive at the correct value for cumulative trunk diameter. For example, if you have three hemlock trees with diameters of 20", 22", and 24", then your cumulative trunk diameter is 66". For this example, you would be able to treat the trunks of all three trees using a basal trunk spray with a spray solution containing 12 oz. of the product mixed with 1 gallon of water in your sprayer. Be sure to read all of the safety and application information including the environmental hazards statement on the label and to follow all the instructions.
hemlock
# 1 34 1/2” trunk diameter
# 2 14” + 11”
#3 9” , 10”, 13”
#4 13”
#5 8”, 3”
The total trunk diameters is 115.5 ". In looking at the mixing suggestions I can't tell if I'm suppose to add a tablespoon of Safari powder to a gallon of water or what. The listing includes for outdoor spray applications ornamental crops. So I don't know if that includes hemlocks since they list the relevant plants as 'evergreens'. I don't know how that differs from a lets say juniper as opposed to hemlocks. So, if you could help me determine the amount of Safari powder I need per gallon of water that would help. Is spraying the trunk the best method or would a drench be better?
Thank you.
Hi, I'm still confused about treating my hemlocks with Safari. I have a one gallon hand pump sprayer. I have 5 hemlocks, only two of which are not split.
hemlock
# 1 34 1/2” trunk diameter
# 2 14” + 11”
#3 9” , 10”, 13”
#4 13”
#5 8”, 3”
The total trunk diameters is 115.5 ". In looking at the mixing suggestions I can't tell if I'm suppose to add a tablespoon of Safari powder to a gallon of water or what. The listing includes for outdoor spray applications ornamental crops. So I don't know if that includes hemlocks since they list the relevant plants as 'evergreens'. I don't know how that differs from a lets say juniper as opposed to hemlocks. So, if you could help me determine the amount of Safari powder I need per gallon of water that would help. Is spraying the trunk the best method or would a drench be better?
Thank you.
