The present investigation was carried out to follow up the population fluctuations of these Coccoidea on mango trees under the conditions of Esna district, Qena Governorate, A.R. of Egypt. There are four different scale insects and one mealybugs species infested mango trees at Esna district. These species are Insulaspis pallidula, Aonidiella aurantii, Kilifia acuminata, Pulvinaria psidii and mealybugs, Icerya seychellarum. The Maskell scale insect, Insulaspis pallidula, had four generations, which were recorded in May, July, October and December in the two years of investigation. While, the...

The present investigation was carried out to clarify the negative effects of the infestation with scale insect on the contents of mineral elements, morphological and chemical characters of certain varieties leaflets of date palm trees at Esna district, Luxor Governorate, Egypt. The obtained results could be summarized as the follows: Results concluded that the uninfested date palm leaflets had significantly higher was found in all measured mineral element contents (macro- and micro-), fresh weight, weight after one hour of drying, dry weight, moisture content, epicuticular wax, leaflet area,...