Abundance, Generation Determination and Spatial
Distribution Pattern of the Sunt Wax Scale Insect,
Waxiella Mimosae (Signoret) (Hemiptera: Coccidae)
Infesting Sunt Trees in Luxor Governorate, Egypt
Volume 4 - Issue 3
Moustafa MS Bakry*
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- Scale Insects and Mealybugs Research Department, Plant Protection Research Institute, Egypt
*Corresponding author:
Moustafa MS Bakry, Scale Insects and Mealybugs Research Dept, ARC Dokii, Giza, Egypt
Received: September 03, 2018; Published: September 12, 2018
DOI: 10.32474/CIACR.2018.04.000187
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Abstract
The present work was carried out throughout two successive years (2016/2017 and 2017/2018) at Esna district, Luxor
Governorate. As a basic study for developing future management of the sunt wax scale insect, Waxiella mimosae (Signoret), to
determine the seasonal abundance of this pest and its spatial distribution pattern. The obtained results showed that insect
population occurred on sunt trees all the year round and has two overlapping generations a year under field conditions. The first
generation occurred in autumn season, started in September 10th and extended until March 10th in the two years and covered a
period of 24 weeks per year and its peaked in November 10th and October 25th during the two years, respectively. Whereas, the
second generation recorded in spring season, observed between the period in February 25th to August 25th, peaked in May 10th and
its duration 24 weeks per year in the both years. In general, the population density was varied in the two generations; the spring
generation of pest was the biggest one in size than the autumn generation during the two years.
The obtained results showed that the favorable time for abundance and maximum values of total population density of W.
mimosae, were recorded in autumn and spring months and were the optimal for the insect multiplication and build up, since the
highest R.M.V.P values was achieved during the both two years. Lowest activity of population was recorded during winter months
(this referred to the cold weather) during the two years. Also, the percentages of the age-structure population of W. mimosae
species, during the both two years, were almost similar. However, the insect age-structured population was considerably differed
among between months and between the two years. Data were analyzed using fourteen indices of dispersion to estimate the spatial
distribution pattern of this pest. All models of dispersion indices exhibited an aggregated distribution and follows a negative
binomial distribution pattern for all alive different stages and total population of W. mimosae in all seasons of the year and on the
over year during the two years of study.
Keywords: Waxiella mimosa; Seasonal activity; Environmental conditions; Peaks; Generations; Spatial distribution and sunt trees
Abstract|
Introduction|
Materials and Methods|
Results and Discussion|
Spatial distribution pattern|
References|