WONDER #2145: What Is the World’s Worst Weed?

Question 1 of 3

Giant salvinia is an invasive species native to Argentina and which other country?

  1. Brazil
  2. Canada
  3. Ecuador
  4. South Africa

Question 2 of 3

Which insect has proven to be an effective means of controlling giant salvinia?

  1. mosquito
  2. fly
  3. praying mantis
  4. salvinia weevil

Question 3 of 3

Which of the following is NOT one of the states fighting giant salvinia infestations?

  1. Florida
  2. Texas
  3. Louisiana
  4. Maine

Check your answers online at https://www.wonderopolis.org/wonder/what-is-the-worlds-worst-weed.