Boric Acid Powder ，用了很多年了

https://www.amazon.com/Zap-Roach-Boric-Roach-Killer/dp/B00LLQ4AU8/ref=asc_df_B00LLQ4AU8/?tag=hyprod-20&linkCode=df0&hvadid=194884170462&hvpos=&hvnetw=g&hvrand=3229632611555425420&hvpone=&hvptwo=&hvqmt=&hvdev=t&hvdvcmdl=&hvlocint=&hvlocphy=9003430&hvtargid=pla-340575447284&psc=1&mcid=7aa7bc53bffd30989910fe723b22dc9c&gclid=EAIaIQobChMIoLLPruzGhAMVg1lHAR1klwM-EAQYASABEgJocfD_BwE