It is best to wait 24 hours after an applcation Sevin Concentrate to water.
We would recommend using soap and water to get the white residue from Sevin Concentrate off of your gutters. It should come right off that way.
We recommend using Sevin Concentrate as directed. If tank mixing with other products, it should be tested first. We are not sure about homemade solutions as ingredients vary.
Unfortunately, per the manufacturer the Sevin Concentrate can't be used for this purpose. It is not labeled to be used for any pasture or free range animal use, only for residential use.
You will mix 1.5 fl. oz. of Sevin Concentrate with 1 gallon of water for boxelder bugs. The upper and lower leaf surfaces, small trucks and stems and twigs need to be sprayed to the point of runoff. Repeat applications may be necessary up to a total of four times a year for trees and six times per year for ornamental shurbs and flowers. Sevin Concentrate should not be sprated more than once every seven days.
If you have any additional questions, you are welcome to call us at 866-623-6917.
If Sevin Concentrate is used as directed, the product should not kill your garden. Be sure to check the label for the specific mixing ratios, as well as the harvest times for each edible.
Sevin Concentrate could be used on apricot trees for prevention and early treatment. Per the product label: Do not use on large trees or where pest populations are generally inaccessible to spray deposits, as inadequate performance will result.
Unfortunately, once the borers have already infested the tree there are not any viable treatment options as they would be protected from sprays. In cases of infestation the general recommendation is to simply protect the surrounding trees with preventative sprays with a product labeled for such a use. There is a great read here by University of CA.
Sevin Concentrate is a contact kill for the listed applications and pests.
Sevin Concentrate is labeled for outdoor use only.