حصر أصناف الحمضيات المصابة بحشرة البق الدقيقي الكروي Nipaecoccus viridis (Newstead) (Hemiptera: Pseudococcidae) في محافظة اللاذقية.

Abstract

A field study was conducted in a citrus orchard in the village of Qabu al-Awamiya in Lattakia Governorate during the month of June to the end of August 2024, with an area estimated at 3.7 hectares, and an altitude of 15 meters above sea level. Through this study, the citrus varieties infected with the spherical mealybug were identified, the total infection rate was calculated and calculated on each of the fruits, leaves and branches, and the intensity of infection on the fruits was calculated during the research period. The results showed the spread of the spherical mealybug on four groups of citrus fruits, including the sweet orange group, the sour group, the mandarin group, and the Indian lemon group. The infection varied among the cultivated varieties, as the highest field infection rate during the three months was recorded in the Abu Sura variety, Citrus sinensis [L.] Var. Washington navel, estimated at (36.66%) in July. The highest infection rate on fruits was on the Clementine variety, Citrus reticulata [Blanco.], at 60% in July. The highest infection rate on leaves and branches was on the Santa Teresa variety, Citrus. lemon [L.] Var. Santa teresa, at 44% and 56%, respectively, in July. The severity of infection on fruits was calculated, as the highest infection rate was on the Abu Sura variety, Citrus sinensis [L.] Var. Washington navel, at 21.11% in July, and the lowest infection rate was on the Valencia variety, Citrus sinensis [L.] Var. Valencia by 1.58% in June, and the peak of the spread of the spherical mealybug was recorded from the end of June (6/29) to the middle of July (7/20), then its numbers began to decline until the end of August. The infestation in the orchard was concentrated on the trees located in the northern and northeastern sides, and in the middle of the tree.