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Journal of Entomology

Year: 2007 | Volume: 4 | Issue: 5 | Page No.: 379-386
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Authors

Riffat Sultana

M. Saeed Wagan

Keywords

Research Article

Life History and Economic Importance of Hieroglyphus nigrorepletusBolivar (Hemiacridinae: Acrididae: Orthoptera) from Pakistan

Riffat Sultana and M. Saeed Wagan
Hieroglyphus nigrorepletus I.Bolivar is reported as injurious pest of rice, sugarcane, wheat, maize and minor pest of millets and fodder crops in Pakistan. Presently a fair number of specimens both nymphs and adults were collected from various province of Pakistan. Present study was carried out in field as well as in laboratory. The hoppers go through six nymphal stages before becoming adult. The developmental rate was recoded 4.37±0.0, 5.02±0.14, 5.73±0.05, 4.79±1.20, 5.64±0.38 and 4.92±0.82 days for first to six instars, respectively. Hoppers usually emerge during July as soon as monsoon begins and adults appear in August-September in field. The total population of hopper was significantly higher during the hottest months of the year i.e., July, August, September and October. The sex ratio is in the favour of females. Similarly the green colour form was more prominent in females as (64.53%) than males (35.46%). Morphological description of various nymphal instars and measurement of different body parts has been discussed. In addition to this, present finding also suggests that mortality percentage of hoppers is increased with an increased in their population density in laboratory.
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