Skip to main content Accessibility help
×
Home

The Reactions of Oxycarenus gossypinus Distant (Heteroptera, Lygaeidae) to Temperature and Relative Humidity

  • F. K. Ewete (a1) and E. O. Osisanya (a1)

Abstract

The distribution of Oxycarenus gossypinus Distant in artificial temperatures (16.5−40.5°C) and relative humidity gradients (20–95%) was studied in the laboratory. The fifth instar nymphs and adult females showed unimodal distribution to the hot end, a temperature range of 29.0−34.0°C and 31.5−37.0°C, respectively. The adult males showed bimodal distribution, one to the cool end, 19.0−24.0°C and the other to the hot end, 31.5−37.O°C. The adult females significantly moved to low relative humidity (20%) and the males moved in fairly large numbers to both low (20%) and high (95%) relative humidities at the ends of the apparatus with no significant difference in their distribution. O. gossypinus showed stronger response to thigmotaxis (movement to definite end for contact) than to relative humidity gradient, because of significant movement to the corners of the apparatus.

La distribution de L'Oxycarenus gossypinus Distant dans la température artificielle (16.5−40.5°C) et les rangs de l'humidité relative (20−95%) furent étudiés dans le laboratoire. La cunquième nymphe et les femelles adultes montrèrent une distribution unimodale envers la partie chaude, avec une tempèrature de 29.0−34.0°C et 31.5−37.0°C respectivement. Les mâles adultes montrèrent une distribution bimodale, l'une envers la partie froide (19.0−24.0°C) et l'autre envers la partie chaude (31.5−37.0°C). Les femelles adultes bougèrent d'une manìére significative envers l'humidité relative basse (20%) alors que les mâles bougèrent dans un très grand nombre vers la basse (20%) et la haute (95%) humidité relative au bout de l'appareil sans différence significative dans leur distribution.

O. gossypinus manifesta une plus forte reaction à la thigmotaxis (mouvement à un bout déflnitif pour le contact) qu'au rang de l'humidité relative à cause du mouvement significatif aux coins des appareils.

Copyright

References

Hide All
Deal, J. (1941) The temperature preferendum of certain insects. J. Anim. Ecol. 10, 323354.
Kirkpatrick, T. W. (1923) The Egyptian cotton seed bug (Oxycarenus hyalinipennis Costa). Its bionomics, damage and suggestions for remedial measures. Ministry Agric. Egypt Tech. and Sci. Service Bull. No. 35.
Madge, D. S. (1961) The control of relative humidity with aqueous solutions of sodium hydroxide. Ent. exp. appl. 4, 143147.
Madge, D. S. (1965) The responses of cotton stainers (Dysdercus fasciatus Sign.) to relative humidity and temperature and the location of their hygroreceptors. Ent. exp. appl. 8, 135152.
Nwana, I. E. (1975) Studies on the Hemiptera—Heteroptera associated with cocoa farms in Nigeria. Ph.D. Thesis, University of Ibadan, Ibadan, Nigeria.
Peacock, A. D. (1913) Entomological pests and problems of southern Nigeria: Bull. ent. Res. 4, 191220.
Pearson, E. O. (1958) The insect pests of cotton in tropical Africa. Empire Cott. Gr. Corp. and Comm. Inst. Ent., Lond.
Pomeroy, A. W. J. (1921) Ann. Rept. Agric. Dept. Southern Provinces, Nigeria, 1920–1921.
Toye, S. A. (1970) Studies on the humidity and temperature reactions of Dermestes maculatus Deg. (Coleoptera, Dermestidae) with reference to infestation on dried fish in Nigeria. Bull. ent. Res. 60, 2331.
Youdeowei, A. (1966) Laboratory studies on the aggregation of feeding Dysdercus intermedius Dist. (Heteroptera, Pyrrhocoridae). Proc. R. ent. Soc. Lond. (A) 41, 4550.
Youdeowei, A. (1967) The reactions of Dysdercus intermedius (Heteroptera, Pyrrhocoridae) to moisture, with special reference to aggregation, Ent. exp. appl. 10, 194210.
Youdeowei, A. (1968) The behaviour of a cotton stainer, Dysdercus intermedius (Heteroptera, Pyrrhocoridae) in a temperature gradient and the effect of temperature on aggregation. Ent. exp. appl. 11, 6880.

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed