Variation of pre‐ovipositional period in the brown planthopper, Nilaparvata lugens, collected in tropical, subtropical and temperate Asia

Abstract

We investigated the pre-ovipositional period of Nilaparvata lugens originating from tropical, subtropical and temperate regions of East and Southeast Asia using laboratory experiments to compare the migration capability of the populations. Macropter females collected in 1992 from Japan and subtropical North Vietnam had a longer immature period than those from tropical Indochina Peninsula, i.e. the day of the first oviposition after eclosion was about 3 days later in the former populations. Populations collected in 1993 and 1994 from Japan, Central and South China, and North Vietnam also had a longer immature period than that of the tropical Malaysian population. Thus, a general trend was demonstrated that macropters originating in temperate and subtropical East Asia had a longer pre-ovipositional period, which is presumably beneficial for pre-reproductive long-distance migration. This finding supports a current hypothesis for the migration system of N. lugens existing in East Asia, which has maintained the capability of longdistance migration throughout years in spite of the disadvantage of prolonged oviposition for multiplication.

Starvation tolerance of macropter brown planthopper, Nilaparvata lugens, from temperate, subtropical, and tropical populations in East and South‐East Asia

“…Using exactly the same populations (same original collections), Wada et al (2007) confirmed that all subtropical and temperate populations had longer pre-ovipositional periods than the tropical populations. Using exactly the same populations (same original collections), Wada et al (2007) confirmed that all subtropical and temperate populations had longer pre-ovipositional periods than the tropical populations.…”

“…The biotype composition of the N. lugens populations (proportions of individuals showing virulence on different rice cultivars) in Japan, China, and northern Vietnam are similar, and show a clear discordance from those of tropical populations Wada et al, 1994;Tanaka & Matsumura, 2000). In addition, Wada et al (2007) demonstrated that macropter females originating from temperate and subtropical East Asia had a longer pre-ovipositional period than those of tropical populations. In addition, Wada et al (2007) demonstrated that macropter females originating from temperate and subtropical East Asia had a longer pre-ovipositional period than those of tropical populations.…”

Rice Planthoppers

“…This was explained by the difference in the sources of immigrants, i.e., Japanese N. lugens were originated from South China in most cases, but sometimes also from other tropical countries. Wada et al (2007) demonstrated that N. lugens populations collected from subtropical and temperate East Asia (Northern Vietnam, Central China, and Kyushu, Japan) had longer adult immature stage before oviposition, compared to tropical populations (Southern Vietnam, Thailand, and Malaysia). The periods required for 50 % female to begin oviposition at 25 °C were 4.7 days for tropical populations and 7.6 days for East Asian populations ( Fig.…”

Development of an ELISA for evaluating the reproductive status of female brown planthopper, Nilaparvata lugens, by measuring vitellogenin and vitellin levels

“…For migratory macropters, the preoviposition period was difficult to estimate because it can be prolonged to 1 month or longer when there is no appropriate habitat available (Kisimoto & Sogawa, 1995). In addition, macropterous BPH originating from temperate and subtropical East Asia had a longer pre-oviposition period than those of tropical populations (Wada et al, 2007). The pre-oviposition period of BPH was influenced by food quality and probably by nymphal rearing densities and resistant rice varieties (Lu et al, 2004;Wada et al, 2007).…”

“…In addition, macropterous BPH originating from temperate and subtropical East Asia had a longer pre-oviposition period than those of tropical populations (Wada et al, 2007). The pre-oviposition period of BPH was influenced by food quality and probably by nymphal rearing densities and resistant rice varieties (Lu et al, 2004;Wada et al, 2007). In this study, we evaluated whether BPH was in the pre-oviposition period in rice fields through determining the levels of Vg ⁄ Vt.…”