Enumeration and estimation of insect attack fruits of some cultivars of Punica granatum.

摘要

In this study, five cultivars of?Punica granatum?identified (two of which are endemic, while the other three are new) were grown in certain farms at Al-Taif, Saudi Arabia. Enumeration to the insects attack its' fruits illustrated that, there are three insects, namely,?Virchola livia,?Ectomyelois?ceratonia?and?Pseudococcus maitimus?(or/andPseudococcus citri) infested both cracked and healthy pomegranate fruits. The population density of immature stage of?V. livia?was noticed in healthy fruit more than cracked fruit, while?E.?ceratonia?was shown the converse. Besides, there?ishigh infection by?the?three insects at 2008 more than 2009. Measurement susceptibility of?the?five cultivars showed that, Al- Taif cultivar was the most resistant one to V. livia?infestation, being 3.5 and 1.8% of immature stage/20 healthy or cracked fruits. While the most resistance one to immature stages of?E. ceratonia was?Wonderful-mangulatory cultivar recording infestation?of?0.0 and 2.4% of immature stage/20 healthy or cracked fruits during 2008 and 2009.?Key word:?Pomegranate cultivars,?Virchola livia,?Ectomyelois?ceratonia, mealy bugs, susceptibility.