In America, must one check brocolli and cauliflower, if yes how? Also must one check rice in america?

It is very complicated to check broccoli and cauliflower. It is advisable to buy them only from a certified company. In our https://www.yeshiva.org.il/ask/print.asp?id=7402"> Hebrew responsa you will find that checking these products is done first by looking for little flies and bugs. Then one must wash it off with soup and water, and finally one has to singe them in a flame. For this reason many refrain from eating them. Regarding rice, it needs to be checked also in America. For details on Kashrut in America it is advisable to refer to the OU or to Star-K Kashrut organizations.