BIOLOGICAL AND ECOLOGICAL STUDIES ON THE LYCTID BEETLE, LYCTUS IMPRESSUS LOM. (LYCTIDAE: COLE-OPTERA) ON CITRUS TREES IN EGYPT | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 6, Volume 78, Issue 1, March 2000, Page 79-89 PDF (2.42 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2000.321475 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| SAED M. HAGGAG; ABDEL-GHANY M. BATT | ||||
| Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| The biology and ecology of the Powder post beetle Lyctus impressus Lom (Lyctidae: Coleoptera) was investigated under the prevailing laboratory conditions. Female beetle lays its eggs in pores on the surface of wood. Adult longevity was 10.05 days and 8.93 days for female and male, respectively. The pre-pupal, pupal and adult hardness durations were 5-11 days, 5-17 days, and 3-10 days. respectively. The pest undergoes three annual generations. Adult activity period extends from the 2nd week of February until the 4th week of October with three distinct population peaks, during the 1st half of April, 4th week of June to 3rd week of July and 4th week of August to 3rd week of September. Temperature appeared to be a principal weather factor influencing beetles activity, while the effect of relative humidity was less evident. | ||||
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