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Notes on the biology and immature stages of West African sorghum head bugs Eurystylus immaculatus and Creontiades pallidus (Heteroptera: Miridae)

Published online by Cambridge University Press:  10 July 2009

A. Ratnadass ,
B. Cissé  and
K. Mallé
A. Ratnadass*
Affiliation:
Entomology Subprogram, Centre de coopération internationale en recherche agronomique pour le développement, West African Sorghum Improvement Program, International Crops Research Institute for the Semi-Arid Tropics, Bamako, Mali
B. Cissé
Affiliation:
Entomology Subprogram, Centre de coopération internationale en recherche agronomique pour le développement, West African Sorghum Improvement Program, International Crops Research Institute for the Semi-Arid Tropics, Bamako, Mali
K. Mallé
Affiliation:
Entomology Subprogram, Centre de coopération internationale en recherche agronomique pour le développement, West African Sorghum Improvement Program, International Crops Research Institute for the Semi-Arid Tropics, Bamako, Mali
*
A. Ratnadass, CIRAD-CA Entomologist, ICRISAT/WASIP, BP 320, Bamako, Mali.
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Abstract

Detailed studies on the immature stages of the sorghum head bugs, Eurystylus immaculatus Odhiambo and Creontiades pallidus Rambur, were carried out in the laboratory at Samanko, Mali, during November 1991 to March 1992, and January to April 1993, and in the field in October 1993. Eggs of both species were laid in maturing sorghum (Sorghum bicolor) grains. The egg incubation period was 4–7 days in E. immaculatus, and 5–7 days in C. pallidus. There were five nymphal instars in both species. The total nymphal period was 6–11 days in E. immaculatus and 8–14 days in C. pallidus. The durations of first, second, third, fourth and fifth nymphal instars were 1–3, 1–2, 1–2, 1–3 and 1–3 days, respectively, in E. immaculatus, and 1–3, 1–2, 1–3, 2–3 and 2–4 days, respectively, in C. pallidus. All the immature stages of E. immaculatus are described and sketched.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 84 , Issue 3 , September 1994 , pp. 383 - 388
Copyright
Copyright © Cambridge University Press 1994

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