Population Studies on Nine Leafhopper Species on Various Host Plants at Giza, Egypt, Using Light Trap and Sweeping Net (Hom., Cicadellidae)

Abstract

Population studies on nine cicadellid species were carried out throughout 1974 at Giza, Egypt, using a modified light trap and sweeping net. These species, arranged descendingly according to their abundance in light trap catches were : Cicadulina bipunctella zeae CHINA, Exitianus taeniaticeps (KIRSCHB.), Recilia schmidtgeni WAGNER, Cicadulina chinai GHAURI, Nephotettix modulotus MEL., Neolimnus aegy tiacus (MATS.), Balclutha rufofaasciata MERINO, Macrosteles sexnotatus (FALLEN), and Orosius albicinctus %IS,. Light trap catches of the majority of these species were relatively abundant only during warm-humid months: August till October. These species were found on a large number of host plants; the average number ofeach species/100 strokes on each host was determined. Sex ratios in light trap and sweeping net samples of most species are given.

Study of Productivity and Economic Evaluation of Intercropping Cowpea With Maize Under Three Irrigation Water Levels and Their Response to Insect Infestation and Viral Infection

“…The nymphs and adults of the leafhopper suck sap from leaves and characteristic symptoms of hopper burn appear owing to the toxigenic nature of leafhopper (Jayaraj, 1967). The leafhoppers can propagate intensively in North Egypt at warm temperatures and caused a big yield loss as reported by El-Nahal et al (1979). Moreover, females of Sesamia cretica lay their eggs under the leaf sheath, and newly hatched larvae enter the plant whorl or stem.…”