The pre-calling period and starting time of calling by females of three Japanese populations of the cotton bollworm, Helicoverpa armigera Hubner (Lepidoptera : Noctuidae)

Casimero, Vic; Tsukuda, Ritsuko; Nakasuji, Fusao; Fujisaki, Kenji

doi:10.1303/aez.34.123

Cited by 12 publications

(11 citation statements)

References 9 publications

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“…In the present study, for the susceptible strain, the onset time of calling advanced from 446.4 min after scotophase on night 1 (calling day 1) to 135 min on night 5, and the length of calling increased from 19.8 min on night 1 to 186.4 min on night 3, and then decreased to 171.2 min on night 5. Various populations of H. armigera might contribute to these differences in calling behaviour, because different geographical populations of H. armigera show different calling behaviours generally 22–24. A common genetic background for different strains of H. armigera in this study makes them directly comparable.…”

Section: Discussionmentioning

confidence: 86%

Modified female calling behaviour in Cry1Ac‐resistant Helicoverpa armigera (Lepidoptera: Noctuidae)

Zhao¹,

Wu²,

liang³

et al. 2009

Pest Management Science

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These results indicate that there is a fitness cost in terms of the female calling behaviour of the resistant strain. The lower proportion of females of the resistant strain showing calling behaviour could reduce the mating frequency of the resistant strain. The delayed onset time of calling in the resistant strain could reduce its mating time, and a reduction in the time spent calling could reduce the attractiveness of resistant females; this could also reduce the mating frequency of the resistant strain.

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Section: Discussionmentioning

confidence: 86%

Modified female calling behaviour in Cry1Ac‐resistant Helicoverpa armigera (Lepidoptera: Noctuidae)

Zhao¹,

Wu²,

liang³

et al. 2009

Pest Management Science

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show abstract

“…Female pre‐calling periods for populations of H. armigera have been documented for widely separated geographical populations around the world and from narrowly separated sources in Japan (Colvin and Gatehouse 1993a; Casimero et al. 1999).…”

Section: Discussionmentioning

confidence: 99%

“…1999). Different geographical populations of H. armigera from Malawi, India and China showed different ages of first calling patterns (Colvin and Gatehouse 1993a), as did three closely spaced populations in Japan (Casimero et al. 1999).…”

Section: Discussionmentioning

confidence: 99%

Comparisons of calling behaviour of different geographical populations of Helicoverpa armigera

Zhao

Guo

2007

J Applied Entomology

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The cotton bollworm, Helicoverpa armigera, with worldwide distribution, evolves into different geotypes for adapting to the changes of geographical climates. Comparisons of calling behaviour of the insect collected from the temperate region in northern China (Beijing), the temperate region in north-western China (Kashi) and the tropical region in southern China (Haikou) were investigated in the laboratory as a first step to understanding the influence of reproductive behaviour on its population differentiation. There were more than 80% of virgin females of each population that showed calling behaviour. The age at which the moths of all three populations initiated calling varied significantly. The durations of calling in scotophase and the percentages of females calling also differed between populations. Only a few females of the Beijing and Haikou populations called in the first 2 h after the onset of scotophase, whereas many Kashi females called at this time. However, the main calling peak occurred during the second half of scotophase for all three populations. Females of the Beijing and Haikou populations exhibited similar calling onset times at the same age, whereas the Kashi females initiated calling significantly earlier than those of Beijing and Haikou from nights 3 to 7. The durations of each calling bout and the time spent by both Beijing and Haikou populations were similar to each other at the same age, but were significantly shorter than that of the Kashi population from nights 3 to 7. These results suggest that there are genetic variations not only in pre-period calling but also in the calling behaviour of H. armigera.

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“…In addition, it has not been clear whether local populations of H. armigera were established in Japan. Because this species has outstanding flight ability (Coombs et al, 1993;Gregg, 1993;Casimero et al, 1999;Zhou et al, 2000), it is probable that populations in Japan reestablish each year by immigration from the subtropics. Our research examined this issue by simulating diapause induction outdoors.…”

Section: Discussionmentioning

confidence: 99%

“…This species has long been observed at low densities in Japan, but has recently become a serious pest. Before the outbreak in 1994, H. armigera was suspected to exhibit annual long-distance immigration from the south (Casimero et al, 1999;Zhou et al, 2000). However, H. armigera now occurs throughout the year in temperate Japan, and it is highly probable that local populations have established.…”

Section: Introductionmentioning

confidence: 99%

Timing of diapause induction and overwintering success in the cotton bollworm Helicoverpa armigera (Hb.) (Lepidoptera: Noctuidae) under outdoor conditions in temperate Japan

Shimizu

Fujisaki

2006

Appl. Entomol. Zool.

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The timing of diapause induction and overwintering success in the cotton bollworm Helicoverpa armigera were studied outdoors in Chiba (35°N, 140°E) and Kyoto (35°N, 135°E) prefectures, Japan, using local populations collected from Chiba and Mie (34°N, 136°E) Prefectures, respectively. For comparison, a similar experiment was performed in Chiba using a closely related species, H. assulta. Diapause induction in H. armigera was stimulated by low temperatures in autumn, and the incidence of pupal diapause increased sharply with little change in photoperiod. In Kyoto, pupae of H. armigera overwintered successfully in a state of diapause. However, larvae that had hatched from eggs deposited in late autumn suffered high mortality, presumably from the cold; therefore, the pattern of temperature change in autumn credibly affects overwintering success in H. armigera. In contrast, a considerable number of H. assulta pupae entered diapause well before autumn, even though those individuals had hatched from eggs deposited during the mid-summer. Thus, H. assulta appeared to prepare for overwintering earlier and more successfully than did H. armigera in this temperate zone. Differences in diapause induction between the sexes revealed in laboratory experiments with H. armigera were not detected under outdoor conditions.

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The pre-calling period and starting time of calling by females of three Japanese populations of the cotton bollworm, Helicoverpa armigera Hubner (Lepidoptera : Noctuidae)

Cited by 12 publications

References 9 publications

Modified female calling behaviour in Cry1Ac‐resistant Helicoverpa armigera (Lepidoptera: Noctuidae)

Modified female calling behaviour in Cry1Ac‐resistant Helicoverpa armigera (Lepidoptera: Noctuidae)

Comparisons of calling behaviour of different geographical populations of Helicoverpa armigera

Timing of diapause induction and overwintering success in the cotton bollworm Helicoverpa armigera (Hb.) (Lepidoptera: Noctuidae) under outdoor conditions in temperate Japan

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