Effect of different host plants on the main insect pests attacking the ornamental plants and their associated predators at Damietta district

Document Type : Original research papers

Authors

1 Plant Protection Dept. Fac. of Agric. Damietta Univ., Egypt

2 Economic Entomology Dept. Fac. of Agric. Mans. Univ., Egypt.

3 Plant protection, Agriculture, Damietta University, Damietta, Egypt

Abstract

The present studies were carried out in the experimental farm belonging to the
Faculty of Agriculture, Damietta University, Egypt and several areas in Damietta
Governorate to evaluate the population abundance of the main insect pests attacking some
ornamental plants and their associated predators during the two successive years, 2021/22
and 2022/23. The obtained results revealed that Planococcus citri (Risso) attracted to
Ficus nitida trees as a host plant during the two years of study. Also, Icerya aegyptiaca
(Douglas) attracted to four host plants among them F. nitida trees was the most favorable
host plant followed by F. benjamina during the two successive years with Significant
differences. Meanwhile, Icerya Purchasi (Mask.) attracted to two host plants and F. nitida
was the most favorable host followed by F. benjamina. Moreover, Icerya Seychellarum
(Westwood) attracted to four host plants with F. nitida was the most preferred host.
Meanwhile, Maconellicoccus hirsutus (Green) attacked Hibiscus rosae only. Also,
Chrysomphalus ficus (Ashmead) attacked F. nitida only but Aonidiella aurantii (Maskell)
attracted to two host plants among them F. nitida was the most preferred host followed by
F. benjamina. Meanwhile, Mycetaspis personata (Comstock) and Ceroplastes floridensis
(Comstock) attracted to F. nitida trees during the two years. Also, Saissetia oleae (Bern.)
and Pulvinaria psidii (Maskell) attracted to F. benjamina as a host plant during the two
years of study. Meanwhile, Nezara viridula (L.) and Earias insulana (Boisd.) attracted
Hibiscus rosae during the two years of study. Regarding to the predatory insects, results
revealed that Rodalia cardinalis (Mulsant) attractive to three host plants and F. nitida was
more favorable than F. benjamina and H. rosae. Also, Coccinella septempunctata (L.)
attracted to three host plants among them F. nitida was the most preferred host followed
by Acalypha marginata and A. wilkesiana. Meanwhile, Orius sp. attracted to five host
plants and F. nitida was more favorable than F. benjamina, H. rosae, A. marginata and A.
wilkesiana. Also, Scymnus interrputus (Goeze) preferred F. benjamina more than hibiscus
rosae. Cydonia vicina isis (Mul.) attracted more to A. marginata than A. wilkesiana.
Further, Syrphus corolla (Fab.) attracted to acalypha wilkesiana as a host plant during the
two years of study

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