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Studies on the population and distribution pattern of Parlatoria zizyphus (Lucas) in citrus orchards in Egypt

Published online by Cambridge University Press:  19 September 2011

H. S. Salama ,
A. L. Abdel-Salam ,
A. Donia  and
M. I. Megahed
H. S. Salama
Affiliation:
Laboratories of Plant Protection, National Research Centre, Dokki, Cairo
A. L. Abdel-Salam
Affiliation:
Department of Plant Protection, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt
A. Donia
Affiliation:
Department of Plant Protection, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt
M. I. Megahed
Affiliation:
Laboratories of Plant Protection, National Research Centre, Dokki, Cairo
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Abstract

The population and distribution pattern of the black parlatoria scale, Parlatorio zizyphus (Lucas) have been investigated. This scale had two annual peaks of abundance in September and May. It passed through three annual generations, the first in September–October, the second in March–April and the third in June–July on grape fruit trees. The build up of insect population on different zones of grape fruit trees in different seasons of the year was studied. The insect distribution of different insect items were significantly affected at different heights and directions of the trees. The highest population tended to be accumulated on the lower and middle shady zones of the trees in different seasons. With regard to directions the central core of the tree harboured the highest population followed by the west direction and the lowest population was accumulated on the north or south direction in the fall and spring. In summer, the highest population settled on the south direction in contrast to the east or north directions, which harboured the lowest population. The mode of insect distribution is discussed in correlation with the environmental conditions.

Keywords

Black parlatoria scaleParlatoria zizyphuscitrus orchardsscale population and distributiongrape
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 6 , Issue 1 , February 1985 , pp. 43 - 47
Copyright
Copyright © ICIPE 1985

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References

REFERENCES

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