none Three different hymenopterous parasitoids, viz. Pristomerus sp. Mesochorus sp. and Apanteles machaeralis were observed to parasitise the larvae of citrus leaf roller, Psorosticha zizyphi Stain. Extent of parasitism by Pristomerus sp. and Mesochorus sp. was higher during July and by Apanteles machaeralis during June. Mesochorus sp. is reported for the first time to parasitise citrus leaf roller. However, no parasitization of eggs and pupae was observed. Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Host parasite relationships; Abiotic factors; Physical factors; Land and freshwater zones; Oriental region Psorosticha zizyphi (Oecophoridae); Hymenopteran parasites; Apanteles machaeralis; Mesochorus & Pristomerus; Prevalence & new host record; India; Ludhiana; Hymenopteran parasite prevalence & new host record Apanteles machaeralis (Braconidae ); Pristomerus (Ichneumonidae ); Lepidopteran hosts; Psorosticha zizyphi; Prevalence; Psorosticha zizyphi (Lepidoptera); Humidity; Temperature; Prevalence relationships; India; Ludhiana, influences Mesochorus (Ichneumonidae); Lepidopteran hosts; Psorosticha zizyphi; Prevalence & new host records; Prevalence; Psorosticha zizyphi (Lepidoptera); Humidity; Temperature; Prevalence relationships; India; Ludhiana; Prevalence & new lepidopteran host record Psorosticha zizyphi (Ichneumonidae); Prevalence; Apanteles; Mesochorus & Pristomerus (Hymenoptera), influences; India