Acta Entomologica Sinica (1997) 40, S25-S29

Kongming Wu and Yuyuan Guo (1997)
[The characteristics of diapause termination of different geographical populations in cotton bollworm, Helicoverpa armigera (Hubner) in China]
Acta Entomologica Sinica 40 (Supp.), S25-S29
Abstract: The characteristics of diapause termination for 13 populations of cotton bollworm, Helicoverpa armigera (Hübner), collected from various geographical regions in China, were investigated in the laboratory. The results showed that the developmental duration of diapausing pupae prolonged with the increase of latitude where the population was collected, for instance, that of Hengyang population (low latitude) and Hami population (high latitude) were (15.6 ± 4.9) days and (41.4 ± 9.0) days at 30°C respectively. The diapausing durations of the populatins from central and north China could be significantly shortened by low temperature treatment, but it only played a slight role on the population from southern China. The developmental thresholds and effective accumulated temperatures of the vernalized diapause pupae of the populations from south, central, north and northwest China were 17.4°C and 146.0 degree-day, 16.6°C and 146.5 degree-day, 15.7°C and 156.4 degree-day, and 15.7°C and 167.7 degree-day, respectively.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Kong Ming Wu, Yu Yuan Guo

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
environment - cropping system/rotation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Helicoverpa armigera		China (south)
	Helicoverpa armigera		China (NE)
	Helicoverpa armigera		China (NW)