Parasitism of green rice leafhopper, Nephotettix cincticeps Uhler by Alloneura oryzaetora, Eudorylas cruciator and Eudorylas tsuboii (Pipunculidae: Diptera) in southern rice cultural area

The rate of parasitism by pipunculids on the cicadellid Nephotettix cincticeps was investigated in field studies in the Korea Republic. Of 3 species of pipunculid parasitoids present (Alloneura oryzaetora [Tomosvaryella oryzaetora], Eudorylas cruciator [Pipunculus mutillatus] and E. tsuboii [P. javanensis]), T. oryzaetora was the most dominant. Parasitism in the nymphal stage was 16.0% for the overwintered generation, 14.0% for the 1st generation on a fallow field, and 29.7 and 4.0% for the 2nd and 3rd generations, respectively, on rice. The 4 peaks of parasitism occurred in late June, early and late August and early September.Abstract 2: This study was carried out to investigate the parasitism of Pipunculidae parasites to the green rice leafhopper, Nephotettix cincticeps Uhler in southern rice cultural area, Chinju, Korea. The percentages of parasitism in the nymphal stage of Nephotetix cincticeps at each generation were 16.0% for overwintered generation, 14.0% for the first generation on fallow field, 29.7% for the second generation and 14.0% for the third generation on paddy field, respectively. The four peaks of occurrence of Pipunculidae parasites (Diptera) in paddy field were observed late June, early and late August and early September. We found three species of Pipunculidae parasites, Alloneura oryzaetora Koizumi, Eudorylas cruciator Perkins and Eudorylas tsuboii Koizumi from the green rice leafhopper. Alloneura oryzaetora was dominant nymphal parasitoid among the three parasites.