| 1594 | First time PPN mentioned by William Shakespeare in his ‘Love’s Labor Lost’ act IV, Scene -3 and wrote in ‘Sowed cockles reaped no corn’ |
| 1743 | J.T. Needham: discovered first PPN Anguina tritici and it was named as ‘Vibrio tritici |
| 1855 | Berkeley, reported root knot nematode (Meloidogyne spp.) from roots of green house cucumber in England |
| 1857 | Kuhn reported stem & bulb nematode Ditylenchus dipsaii. |
| 1859 | Schacht, reported sugar beet cyst nematode (Heterodera schachtii) |
| 1865 | H.C. Bastian, he known as Father of Nematology and wrote monograph of the Anguillulidae |
| 1871 | Kuhn first experimented CS2 for control of Sugar beet cyst nematode. |
| 1884 | J.G. Deman, gave “Biometry’ and taxonomic monograph (Morphometry). |
| 1907 | N.A. Cobb, known as Father of American (modern) Nematology. |
| 1933 | Tom Godey: He published two books., 1. Plant parasitic nematodes and disease they cause in 1933. 2. Soil and fresh water nematodes in 1951. |
| 1937 | Chitwood & Chitwood wrote a book: An Introduction to Nematology’. |
| 1943 | Carter discovered nematicidal properties of DD. (JRF- 09) |
| 1945 | Christie, discovered nematicidal properties of EDB |
| 1958 | Hewitt, Rask and Goheen, first reported the transmission of viruse by nematode(Xiphinema index) transmitting .grape vine fan leaf virus disease in USA |
| 1961 | G. Thorne wrote book ‘Principle of Nematode known as Bible of nematology). |
