The prevalence of the helminth infections of the Nile fishes Bagrus bayad, Clarias lazera, Tilapia nilotica and Barbas bynni was investigated. 234 (66.5%) out of 352 examined freshwater fishes were infected with the helminth parasites. Single or mixed infections were noticed among the infected fishes. Out of the the fish examined, 72.2% were found harbouring Trematode parasites, 8.1% harboured nematodes ... إقراء المزيد

ABSTRACT The effects of five corn hybrids on some biological parameters of R. maidis were studied under laboratory conditions. The lowest developmental time of nymphal stage was recorded on Hi-Tech-2066 with 5.13 days. The highest mean number of offspring was recorded on Hi-Tech-2066 (46.20 nymphs/ female), while Hybrids Watania-6 and 131 gave the significantly lower mean number of 30.67 and ... إقراء المزيد