Yes these are thrips!
You can use neem oil to kill them. Neem oil is 100% organic and reallt cheap. You need neem oil with a emulsifier because it is a oil and they usually don't solve in water without.
So buy neem with a emusifier (you can also use green soap as an emulsifier). Make a solution with water and 3% neem. Spray the leaves (top and bottom) with this solution everyday for 1 week. And they will be all gone within a week!
Neem is really usefull for all kind of bugs that are a threat to our beloved cannabis. When you have bugs that are eating your roots like gnats you can give this same solution (3% neem) during watering for 1 week and same results the bugs in the soil are gone!
Happy Growing! 😋