In the experiment, you treated trips by spraying the pesticide directly on the target (coating the target). However, what about the rice stem borer pests that are inside the rice stalks, maybe under these conditions, the pesticides that are sprayed will be blocked by the rice stalks. Is there a special technique for spraying pesticides, especially for pests that are in the plants? such as rice stem borer.  

https://youtu.be/r1gs8efDlgY
Try applying this method.  

Ok, I will try the recipe. Thank you very much.  

As a step to prevent the emergence of rice stem borer pests, what should I do? Please guide me.