Mas Immigration and Occurrence of the Rice Leafroller Cnaphalocrocis medinalis GUENEE in Kagoshima Prefecture in 1993.

Tatsuki

2003

Appl. Entomol. Zool.

We examined the effect of moth age and photoregime on the timing of male response to sex pheromones in male Cnaphalocrocis medinalis. The responsiveness of males varied with age, increasing up to 3-days and then remaining constant to 7-days. In male responses to the pheromone throughout the scotophase under five different photoregimes, it was shown that the time to reach the maximal response level after lights-off was rather constant (ca. 4 h), regardless of the duration of the scotophase in a range from 6 to 18 h. The maximal response level in every case appeared to be maintained until the end of the scotophase. Furthermore, in the experiment involving Ϯ3 h shifts of lights-off or lights-on timing from the usual 15L:9D, the male responsiveness increased within 4 h after lights-off, and the maximal level extended throughout the remaining dark period. These results suggest that, at least under the present experimental conditions, only lights-off and lights-on cues are critical for the timing of the increase and decrease in responsiveness. No responsiveness was observed under light conditions, showing that light inhibits the responsiveness of males to sex pheromones.

Section: Discussionmentioning

confidence: 99%

Effects of photoregime on the timing of male responses to sex pheromones in male Cnaphalocrocis medinalis (Lepidoptera: Crambidae)

Tatsuki

2003

Appl. Entomol. Zool.

“…The reproductively immature stage of P. unipuncta moths has been implicated in their seasonal migration 3,24,25 . C. medinalis is also a long-distance migrator 11,26 , so the reproductively immature period, 2 days after emergence, may be linked to this migration.…”

mentioning

confidence: 99%

The Effect of Photoregime on the Calling Behavior of the Rice Leaf Folder Moth, Cnaphalocrocis medinalis (Lepidoptera: Crambidae)

Tatsuki

2011

JARQ

The rice leaf folder, Cnaphalocrocis medinalis, showed a circadian rhythm in its calling behavior at 25 ± 1 o C. Female moths showed calling behavior most frequently 5-7 h into the scotophase under LD 15:9. Female moths at age 4 (days), after entraining at LD 15:9, showed a free-running rhythm for at least two more cycles in continuous darkness. The rhythm was damped out in constant light. The temporal pattern in the calling behavior was affected by different LD cycles (LD 15:9, 12:12, and 9:15), indicating that the rhythm in calling behavior was entrained by the LD cycles. By changing one photoregime condition to another after calling had been initiated, it was shown that C. medinalis females use the light-off signal to phase-set the circadian rhythm of calling behavior. Our results suggest that the rhythm in calling behavior is a circadian rhythm entrained by LD cycles.

“…Individuals that have been captured in Japan during early summer are thought to be migrants, mostly from the rice double‐cropping areas of southern China, such as Fujian and Guangdong Provinces, where rice planthoppers exist (Wada et al. 1980; Kamiwada et al. 1994; Kawazu et al.…”

Section: Resultsmentioning

confidence: 99%

“…Eight of these species ( S. recurvalis, C. medinalis, M. vitrata, M. pyrrhosticta, H. armigera, P. separata, S. litura and C. agnata ) are reportedly able to migrate over long distances (Asahina & Turuoka 1969; Wada et al. 1980; Hirai 1982; Miyahara 1993; Kamiwada et al. 1994; Riley et al.…”

Section: Resultsmentioning

confidence: 99%

Lepidoptera captured on the East China Sea in 2005 and predicted migration sources

Tonogouchi³

et al. 2008

Entomological Science

This paper provides a list of moths captured in a region at latitudes 29-32°N and longitudes 127-130°E on the East China Sea on 14-28 June and 1-7 July 2005. Sixteen species of moths from the families Plutellidae, Crambidae, Sphingidae and Noctuidae were identified. Among these, three species were recorded on the East China Sea for the first time. The migration paths of the captured moths were analyzed using a threedimensional backward trajectory analysis method. Predicted migration sources for these moths are Taiwan and Fujian, Guangdong, Jiangxi, Zhejiang, Jiangsu, and Anhui provinces in China.