Guava orchards in Haryana were facing symptoms of sudden decline and loss in productivity due to heavy infestation of highly pathogenic species of Meloidogyne not only by itself but also causing havoc through predisposing the host for secondary attack by wilt fungus Fusarium spp causing disease-complex with synergistic effects on the common host guava. Severely infested plant showed small leaves, slightly browning in colour, leaf drop, growth inhibition whereas roots are distorted by small and large multiple galls leading to sudden death of tree. Fungus and nematode-induced soil-borne diseases are among the main constraints in agricultural production and are quite challenging to be managed. Due to data unavailability of plant-parasitic nematodes associated with guava orchards, a detailed survey was conducted in the main guava-growing regions of Haryana during 2019-21 (2019-20, 2020-21 and 2021-22) to assess the occurrence, distribution and diversity of plant-parasitic nematodes (PPNs) associated with guava orchards. In this respect, a total of 95 roots and rhizosphere soil samples of guava orchards of different districts (eight) in Haryana were analysed for the infestation of PPNs. Out of 95 samples, 60 samples were found infected with root-knot nematode, Meloidogyne incognita with 63.2 per cent frequency of occurrence with density range of 50-785 nematodes/200 cc soil. The root-knot index of infested guava orchards ranged from 1.0-5.0. Other plant-parasitic nematodes which were found associated with the guava belonged to Pratylenchus sp., Hoplolaimus sp., Helicotylenchus sp. and Rotylenchulus reniformis. Helicotylenchus had the highest mean population density (146.6 nematodes/200 cc soil), followed by Hoplolaimus (120.7 nematodes/200 cc soil). Based on incidence, population density and associated damage on guava M. incognita was considered to be the most important PPNs. Among the districts, the highest incidence of damage by M. incognita was observed in Palwal followed by Sonipat, Sirsa and Bhiwani.