Popis: |
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 aegyptiacus (MATS.), Balclutha rufofasciata MERINO, Macrosteles sexnotatus (FALLEN), and Orosius albicinctus DIST. 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 of each species/100 strokes on each host was determined. Sex ratios in light trap and sweeping net samples of most species are given. |