SEASONAL ABUNDANCE, NUMBER OF GENERATIONS AND HORIZONTAL DISTRIBUTION OF Aulacaspis tubercularis (NEW STEAD) AND ITS ASSOCIATED PARASITOIDS ON MANGO TREES

Document Type : Original Article

Authors

1 Plant Protection Research Institute, Agricultural Research Center, Egypt

2 Department of Plant Production, Faculty of Technology &Development, Zagazig University, Egypt

3 Plant Production Department, Faculty of Technology and Development, Zagazig Univ., Egypt

Abstract

The seasonal abundance of Aulacaspis tubercularis (Newstead) and its associated parasitoids on mango trees varity hendi was studied in Inshas El-Raml district, Sharkia Governorate during the two successive years (2017 and 2018).
The obtained results were summarized as follows:

Females, males and total alive stages population showed two peaks of activity during the two successive years.
Nymphs population appeared four and two peaks of activity during the two successive years, consecutively.
During the first year the mean percentage of total mortality (13.71%) was relatively lower than the mean percentage of total mortality during the second one (29.52%).
During the course of this work, two hymenopterous species were recorded as parasitoids of A. tubercularis. They were Aphytis sp. and Aspidiotiphagus sp.(Aphelinidae).The mean percentages of parasitism were 2.78 and 7.37% during the first and second years, respectively.
Coefficient of determination (C.D.%) affected total number of alive stages population by 70.60 and 87.13 % during the first and second years, consecutively.
The pest, A. tubercularis had three generations annually on mango trees varity hendi during the two successive years. The generation took about 3 to 5 months.
 The insect and its associated parasitoids occurred in north eastern side of the trees.


Conclusively, seasonal abundance of Aulacaspis tubercularis (Newstead) and its associated parasitoids on mango trees varity Hendi showed that female, males and total alive stages population two peaks of activity during the two successive years. The pest, A. tubercularis had three generations annually during the two successive years. During the course of this work, two hymenopterous species were recorded as parasitoids of A. tubercularis. so, when uses pesticides it must be concentrate on the opposite side.
Key words:

Keywords

Files

Share

How to cite

Statistics