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46132

The Population Abundance of the Mealybug Species Infesting Pomegranate Trees and their Associated Insect Predators in Mansoura Region, Egypt

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Last updated: 22 Jan 2023

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Abstract

Experiments were carried out in the experimental farm belonging to Faculty of Agriculture, MansouraUniversity during the two successive years 2014 and 2015 to study the population abundance of mealybug species attacking pomegranate trees and their associated predatory insects. The seychelles fluted scale Icerya seychellarum (Westwood) recorded the highest peaks of abundance during the period of study and represented by 367 and 568 individuals/sample followed by the citrus mealybug Planococcus citri Risso which represented by 192 and 242 individuals, respectively. Meanwhile, the cottony- cushion scale Icerya purchasi (Maskell) recorded the lowest peaks of abundance during the two years of study and represented by 46 and 29 individuals followed by the Egyptian fluted mealybug Icerya aegyptiaca (Douglus) which represented by 58 and 98 individuals, respectively. Vidalia beetle Rodolia cardinalis (Mulsant) recorded the highest peaks during the two successive years and represented by 42 and 57 individuals followed by the green lacewing Chrysoperla carnea (Steph.) and represented by 32 and 29 individuals, respectively. Meanwhile, coccinellid predator Nephus includens (Kirsch) ranked last category, and represented by 12 and 16 insects in the two years, respectively. Statistical analysis between the four seasons for the mealybug species revealed that a highly significant differences during the two years. I. seychellarum recorded the highest average number 110.3 and 158.6 individuals/sample, followed by P. citri 74.2 and 87.9 individuals while I. purchasi came in the last category with an average of 9.4 and 6.0 individuals, during the two successive years, respectively. Regarding to the associated insect predators, R. cardinalis ranked the first category and represented by 60.6 and 69.4% followed by C. carnea 30.4 and 22.7 % while N. includens came in the last category with 9.0 and 7.9% during the two successive years, respectively. Predator-prey ratio was the best during the period from July tell December and ranged between 1: 4.7 and 1: 10.6 during the two years.

DOI

10.21608/jppp.2017.46132

Keywords

Mealybug species, Insect predators, Pomegrenate, Population abundance, Predator-prey ratio

Authors

First Name

Hagar

Last Name

Awadalla

MiddleName

S. S.

Affiliation

Economic Entomology Dep. Faculty of Agriculture, Damietta University, Egypt

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Volume

8

Article Issue

1

Related Issue

6886

Issue Date

2017-01-01

Receive Date

2019-08-28

Publish Date

2017-01-01

Page Start

15

Page End

19

Print ISSN

2090-3677

Online ISSN

2090-3758

Link

https://jppp.journals.ekb.eg/article_46132.html

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https://jppp.journals.ekb.eg/service?article_code=46132

Order

3

Type

Original Article

Type Code

888

Publication Type

Journal

Publication Title

Journal of Plant Protection and Pathology

Publication Link

https://jppp.journals.ekb.eg/

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Article

Created At

22 Jan 2023