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VOL. 5, ISSUE 3 (2023)

Population dynamics of Palpita unionalis and Prays oleae in relation to certain ecological factors in olive orchards

Authors

Salma Kh Ragab, Nabil M Ghanim

Abstract

The olive leaf moth (jasmine moth), Palpita unionalis Hübner (Lepidoptera: Pyralidae) and the olive moth, Prays oleae Bern. (Lepidoptera: Praydidae) are of the major lepidopterous pests infesting olives in Egypt and other Mediterranean countries. The population dynamics of these pests in olive orchards at Dakahlia and Damietta governorates in addition to their responses to certain weather factors and the height of the olive trees were the purposes of the present study. The obtained results showed that populations of P. unionalis and P. oleae occurred all over the year. P. unionalis showed three distinct peaks of activity; while, P. oleae showed three and two peaks of activity at Dakahlia and Damietta governorates. The two pests exhibited relatively high activities during summer season in the two governorates. Statistical analysis showed that the effects of daily mean temperature and relative humidity on the seasonal activity of P. unionalis and P. oleae were relatively low. Populations of P. unionalis and P. oleae are significantly affected by the height on the olive trees which the samples were taken from it; where, the regression analysis showed that every increase on the height on trees increased P. unionalis and P. oleae larval populations by obvious numbers at Dakahlia and Damietta governorates.

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Pages:14-20

How to cite this article:

Salma Kh Ragab, Nabil M Ghanim "Population dynamics of Palpita unionalis and Prays oleae in relation to certain ecological factors in olive orchards". International Journal of Agriculture and Plant Science, Vol 5, Issue 3, 2023, Pages 14-20

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