| 2026-06-14 | Wrestling move named after a pesticide |
| 2025-11-26 | Once-common pesticide banned in 1972 |
| 2025-08-04 | E.P.A.-banned pesticide |
| 2025-01-29 | Toxic insecticide |
| 2023-07-23 | Substance banned for agricultural use in 1972, for short |
| 2022-10-06 | Banned antimalarial |
| 2022-08-14 | Banned insecticide |
| 2022-07-08 | Banned compound once used to control malaria |
| 2022-01-29 | Subj. of Rachel Carson's "Silent Spring" |
| 2021-11-06 | Noted organochloride, in brief |
| 2021-07-22 | E.P.A.-banned pesticide |
| 2021-05-31 | Banned pesticide, for short |
| 2020-12-18 | Target of a 1972 ban |
| 2020-05-19 | Insecticide whose 1972 ban led to the comeback of the bald eagle |
| 2020-03-08 | "Silent Spring" subject, for short |
| 2020-01-15 | E.P.A.-banned pesticide |
| 2019-12-16 | Banned insecticide |
| 2019-09-13 | Substance whose primary use earned its discoverer the 1948 Nobel Prize in Physiology - but is now banned |
| 2019-03-24 | Pesticide banned in 1972 |
| 2019-02-13 | Banned insecticide |
| 2018-11-01 | Debugging aid? |
| 2017-05-17 | Pesticide banned in the '70s |
| 2017-04-02 | Banned insecticide |
| 2017-03-12 | Target of a 1972 ban |
| 2016-07-24 | "Silent Spring" subject |
| 2016-01-10 | "Silent Spring" spray |
| 2015-12-20 | Chemical used to fight malaria |
| 2015-09-30 | E.P.A.-banned pesticide |
| 2015-09-22 | Pesticide banned in 1972 |
| 2015-09-07 | Banned insecticide |
| 2015-05-28 | "Silent Spring" topic, in brief |
| 2015-03-04 | "Silent Spring" pesticide |
| 2015-02-19 | "Silent Spring" topic, for short |
| 2014-12-28 | Antimalarial agent |
| 2014-10-17 | Malaria-fighting compound during W.W. II |
| 2014-05-01 | Chemical restricted by the Stockholm Convention |
| 2014-04-11 | Target of a 1972 ban |
| 2013-07-27 | "Silent Spring" topic |
| 2013-04-17 | E.P.A.-banned substance |
| 2012-12-24 | Banned insecticide |
| 2012-05-22 | Insecticide whose spelled-out name has 31 letters |
| 2012-01-04 | Subj. of the 1948 Nobel in Physiology or Medicine |
| 2011-06-04 | Target of a 1972 ban in the U.S. |
| 2010-12-27 | Banned insecticide, for short |
| 2010-11-26 | It's been banned in the U.S. since 1972 |
| 2010-03-17 | Banned bug spray |
| 2009-09-25 | "Silent Spring" subj. |
| 2009-09-13 | Banned insecticide |
| 2009-07-19 | Toxic spray |
| 2009-06-22 | Banned bug spray |
| 2009-03-13 | "Silent Spring" subject |
| 2008-10-16 | Banned pesticide |
| 2008-03-03 | Banned insecticide |
| 2007-04-22 | Banned spray |
| 2006-12-15 | One target of Rachel Carson's "Silent Spring" |
| 2006-10-24 | Banned insecticide |
| 2006-05-22 | Banned pesticide |
| 2005-07-26 | Banned insecticide |
| 2003-08-31 | Banned pesticide |
| 2002-11-29 | Chloral derivative, for short |
| 2002-08-04 | Old agricultural letters |
| 2002-07-29 | Banned insecticide |
| 2001-05-02 | Danger in the water supply |
| 2000-03-25 | "Silent Spring" subject |
| 1999-04-25 | Insect killer |
| 1999-04-15 | "Silent Spring" topic |
| 1998-10-22 | Bug killer, briefly |
| 1998-05-10 | C14H9Cl5 |
| 1998-03-14 | C14H9Cl5, familiarly |
| 1997-09-09 | Banned pesticide |
| 1996-10-11 | Subject of a 1973 ban |
| 1996-09-13 | Bug killer |
| 1995-11-22 | Potent pesticide |
| 1995-05-25 | Mantis killer |
| 1995-04-09 | Banned insecticide |
| 1994-07-20 | It was banned in 1973 |