Heterodera mothi completed its embryonic development in about a week. Hatching occurred in distilled water in March April, Larvae penetrated roots of Cyperus rotundus in 48h without preference for any tissue. Second moult occuraed in 96 h and third moult 6 days after inoculations. Males developed faster than females and adult males could be seen on 8th day whereas female larvae took 14 days to reach adult stage. Males usually coiled around a female inside the root until a very late stage. Egg laying started on 17th day and eggs were deposited within the roots. Females erupted out of the roots leaving eggs attached there to and only in few instances (2%) a female was found with egg masses in a gelatinous matrix which was larger than the adult size. An egg mass contained 110 eggs and a cyst 188. Brown phase of cysts was reached on 30th day. In October-November, both egg laying and hatching did not occur.
