Biological, ecological and survey studies on tree insect borers in burg El-Arab | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 8, Issue 2, August 2000, Pages 135-152 PDF (680.87 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.2000.460567 | ||
| Authors | ||
| W. A. Shehata* ; Hoda Helal; G. N. Girgis | ||
| Plant Protection Research Institute, ARC, MOA, Dokki (123111), Giza, Egypt. | ||
| Abstract | ||
| Survey on tree insect borers had been done to throw light on the widespread serious borers in Burg El-Arab. Biological and ecological investigations on two harmful borers, Paropta pradoxa on grapevine and Hesperophanes griseus on fig trees were carried out during 1997-1999 Eight injurious insect borers were recorded on seven fruit and wood tree hosts Rate and degree of borers infestation on their different tree hosts were estimated External and internal damage caused by P. paradoxa and H. griseus were determined . Larval and pupal duration of P. paradoxa and H. griseus lasted for 338.5±4.0 days (at 20.8ºC and 63.5% R H) and 325.3±3.8 days (at 20.6ºC and 61.3% R.H), respectively. A single larva of R paradoxa and H. griseus which survived (291-335) and (277-323) days consumed 94.8 and 45.5 cm in length of wooden tissues of grapevine and fig branches, respectively . Moths of P. paradoxa started to appear from grapevine trees during late May or early June and continued to October Two peaks of moths emergence were recorded during the 2nd half of July or the 1st half of August and the 1st half of September Beetles of H. griseus began to appear from fig trees during April and resumed to late October or early November. Two peaks of beetles emergence were existed in the 1st half of June and the 1st or the 2nd half of August . Reinfestation one year later raised the adult population of P. paradoxa and H. griseus by 26.0 moths and 108.2 beetles per tree, respectively. | ||
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