you can spray just about anything you want on the hops to get rid of the problem, but if you don't first diagnose what the problem is, you may and probably will be wasting your money and applying pesticides unnecessarily. if you have to spray 'something' on them without being able to identify the pest, please use something easy on the environment like some diluted dish soap which works on a lot of insect pests. not trying to be difficult, just realistic. grow on!
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