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Life table analysis of the green rice leafhopper, Nephotettix virescens (distant) (Hemiptera: Cicadellidae), and efficient vector of rice tungro disease in asynchronous rice fields in Indonesia
Author(s) -
Aryawan I Gusti Ngurah,
Widiarta I Nyoman,
Suzuki Yoshito,
Nakasuji Fusao
Publication year - 1993
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/bf02515643
Subject(s) - leafhopper , biology , population density , population , hemiptera , agronomy , veterinary medicine , botany , demography , sociology , medicine
Summary Population dynamics of Nephotettix virescens was studied in 17 paddy fields transplanted at intervals of about 1 month in 1988–1990. The adult density was highest either in the immigrant or the 1st generation and sharply decreased to the 2nd generation. The survival rate of the 1st generation was lowest in the transition season when areal population density increased. Key factor analysis revealed that the nymphal and adult mortality of the 1st generation (kn) was the principal source of population fluctuations. No significant correaltion was found between kn and natural enemy density, natural enemy density/healthy egg density, or the precipitation during the nymphal period. On these bases adult emigration was suspected to be the key factor. Areal population build‐up of N. virescens in the transition season was considered to occur as a result of increasing immigration to young stages of rice.