Effect of Some Chemical Characteristics of Olive Leaves on the Biological Activity of Dasineura oleae Angelini (Diptera: Cecidomyiidae)

Abstract

Abstract The results of the statistical analysis showed that there was a clear significant difference in the amount of phenols between the Bakwal variety and the rest of the varieties, while the Syrian, Nepalese, and Khastawi varieties did not differ. Significantly, the percentage of phenols was 8.08, 4.98, 3.98, and 2.58 for the studied varieties. The results showed the effect of the amount of silica in the Nepalese, Khastawi, and Syrian varieties of Bakwal on the average olive flies. The Syrian variety contains the highest amount of silica compared to the rest of the varieties, reaching 0.100, 0.102, 0.106, and 0.188%, respectively, of dry weight. The results showed that the highest percentage of potassium in The Syrian variety amounted to 0.440%, followed by Al-Khastawi and amounted to 0.410%, then the Nepalese variety 0.330%, and finally the Bakwal variety 0.240%. It was found that the amount of chlorophyll in the Bakwal, Nepali and Khastawi variety was higher than the amount of chlorophyll in the four non-varieties, respectively, 9.65, 8.25, 8.12, and 3.44 mg. /g fresh weight, respectively. These results for some chemical characteristics showed a gradual increase in the general average of infection, reaching 8.08, 4.98, 3.98, and 2.58 swelling/10 leaves, respectively.