POPULATION DENSITY OF SOME INSECTS INFESTING Lantana camera L. SHRUBS AND THEIR PREDATORY INSECTS AT MANSOURA DISTRICT

Abstract

Field experiments were conducted in the experimental farm of the Faculty of Agriculture, Mansoura University between January and December during the two successive years 2012-2013 and 2013-2014. Biweekly samplings were done on Lantana Camara L., to evaluate the population density of some insect pests attacking Lantana and their predators. The obtained results revealed that there were five species namely this species were Planococcus citri Risso, Ferrisia virgata (Cockerell), Orthezia insignis Browne, Aphis gossypii Glover and Bemisia tabaci (Gennadius) were recorded. The results showed that P. citri was the most dominant species in the two years of study. The predatory insects were Hyperaspis vinciguerra Capra, Scymnus syraicus Marseul and Chrysoperla carnea( Stephens). The population density of P. citri recorded three peaks in the two years of study, F. virgata had three peaks and O. insignis had three peaks in the two years of investigation.A. gossypii had three peaks during the two years, while the data cleared that B. tabaci, had three peaks during the two years of investigation. The dominant predator was H. vinciguerra the main predator of mealybug insects and this predator had four peaks during the two years of study. Scymnus syraicus and Chrysoperla carnea had one peaks during the two years of investigation.

The Striped Mealybug Ferrisia virgata (Hemiptera: Pseudococcidae)Monitoring and Population Dispersion on Acalypha Shrubs and its Control in Luxor Region, Egypt

“…Balboul (2003) also recorded two peaks of seasonal abundance in early November and mid-October on guava trees. However, El-Batran et al (2015) in Mansoura, Egypt, recorded three seasonal population…”

“…As a result of advanced damage, symptoms of wrinkling, dwarfing, stunting, dryness, and shrinkage appear on the leaves, and eventually the entire leaf dries and falls. In general, maybugs can also indirectly damage plants by transmitting plant pathogens such as viruses (Franco et al 2009;El-Batran et al 2015;Mittler and Douglas, 2003). Miftakhurohmah et al (2022) mentioned the mealybug, Ferrisia virgata a vector of the piper yellow mottle virus in black pepper (Piper nigrum).…”