Impact of neighboring on some arthropods associated with castor bean, Recinus communis L. in Assiut area

To study the effect of different neighbors to castor bean, Ridtms communis L., on some arthropods inhabiting castor bean trees. Two locations in Assiut Governorate involved two sites [agronomy farm and animal production farm] for each location was chosen during the whole year of 2012. The pests [i.e. whitefly, Bemisia tabaci [Gennadius] [Homoptera]; jassid, Empoasca spp.[Homoptera] and the two-spotted spider mite, Tetranychus urticae Koch [Prostigmata] as well as the predators [i.e. Scolothrips longicornis Priesner [Thysanoptera]; Onus spp. [Heteroptera] and Amblysieus spp. [Mesostgmata] were surveyed on castor bean trees at two locations. The population density, at animal production farm, was more abundant than that of agronomy farm for ail species at both of cultivated land and newly reclaimed area except at agronomy farm in the newly reclaimed area B. tabaci and Orius spp. recorded higher abundant than that of animal production farm. The difference of neighboring and location affects the fluctuation and peak of the studied species. The results showed that B. tabaci represented key pest at agronomy farm and animal production farm at both cultivated land and newly reclaimed area. Whereas, T. urticae and Empoasca spp. showed as potential pest at both agronomy farm and animal production farm in both of locations. Regarding the predators, and longicornis in the cultivated land and Amblysieus spp. in the newly reclaimed showed higher dominant and abundant at both agronomy farm and animal production farm

Parasitism on cabbage aphid, brevicotyne brassicae [linnaeus] [homoptera: aphididae] associated with canola plants in Assiut

Thirteen cultivars of canola were subjected to evaluate the percentage of parasitism on cabbage aphid, Brevicoryne brassicae L. infesting canola plants in the field and laboratory during 2011 season in Assiut Governorate. The rate of parasitism in the field was [7.13%] for all cultivars. The rate of parasitism of the aphid collected from the field and reared in the laboratory was 2.67% times higher than the rate of parasitism in the filed at the end of season regardless the canola cultivars. The highest rates of parasitism were recorded with the early ripening cultivars, while the lowest ones were realized with the late ripening cultivars. In the field, the rate of parasitism increased progressively during the third week of February to a peak level [parasitism 43.15%] in the second week of March. Whereas in the laboratory, the highest rate of parasitism [53.06%] was achieved during the last week of February and then the parasitism started to decrease gradually during March. Two primary parasitoids species [Diaeretiella rapae McIntosh and Praon necans Mackauer, Aphidiidae] and two hyperparasotoids species [Alloxysta sp., Cynipidae and Chalcids sp., Chalcididae] were associated with cabbage aphids in canola fields. D. rapae consider the most important primary parasitoids on B. brassicae which represented about 93.93% of the total primary parasitoids in canola field. While, Alloxysta sp. was the most hyperparasioid represent 81.67% of the total of the secondary parasitoid. However, the primary parasitoids recorded the most percentage [71.94%] comparison with the percentage of secondary parasitoids [28.06%] from the total parasitoids for primary and secondary parasitoids

Survey of insects and mites inhabiting leaves and soil of lantana camara L. in Assiut Governorate

This study was conducted throughout whole year of 2009 on lantana hedges bordering farms at cultivated land and newly reclaimed area in Assiut Governorate. The survey revealed the presence of four insect species [Aphis nasturtii Kaltenbach Bemisia tabaci [Gennadius]; Empoasca decipiens Paoli; Scolothrips Iongicornis Priesner], and two mite species [Tetranychus urticae Koch and Amblyseius sp.] on lantana leaves in the two studied areas. Additionally, eleven soil mite species belonging to ten families [Caloglyphus sp. Acaridae; Euphthiracarus sp. Euphthiracaridae; Galumna sp. Galumnidae; Sterroppia sp., Oppiella sp. Oppiidae; Ololaelaps bregetovae Laelapidae; Lasioseius quinisetosus Ascidae; Parasitus sp. Parasitidae; Acaropsella notchi Cheyletidae; Pediculochelus sp. Pediculochelidae and Spinibdeila sp. Bdellidae] were recorded. The population density of A. nasturtii, B. tabaci E. decipiens and Amblyseius sp, was more abundant at newly reclaimed area, while T. urticae and S. longicornis were more abundant at cultivated land. Also, the newly reclaimed area harbored higher numbers of soil mites than that of cultivated land. The Cryptostigmata species exhibited the higher number followed by Astigmata and Mesostigmata, while low numbers of the Prostigmata were recorded in the cultivated land and newly reclaimed area

Survey of insects and mites inhabiting leaves and soil of lantana camara L. in Assuit governorate

This study was conducted throughout whole year of 2009 on Lantana hedges bordehg farms at cultivated land and newly reclaimed area in Assiut Governorate. The survey rvealed the presence af four insect speclees [Aphis nasturil Kaltenbach; Bemisia tabaci [Gennadius] Empoasca declpiens Paoll Scolothrips Longicornis Priesner and two mite species [Tetranychus Urticae Koch and Amblyseius sp.] on lantana leaves in the two studied areas. Additionally, eleven soil mite species belonging to ten families [Calogiyphus sp. Acariade;Euphthiracarus sp. Euphthracaridae ;Galumnidae. Sterroppia sp.Oppiella sp. Oppiidae; ololaelaps bregetovae Laelapldae; Laelapidae quinisetosus Ascidae; Parasitus sp. Para Asitidae Acaropsella notch Cheyletidae;Pediculochelus sp. Pedinnlocbelidae and Spinibdella sp. Bdellidae] were recorded. The population density of A. nasturilB. Tabaci E.decipiens and Amblyseius sp., was moree abundant at newly reclamed area, While T. urticae and S. Longicornis were more abundant at cuItivated land. Also, the newly reelaiamed area harbored higher number of soil mites than that of cultivated lands. The Cryptostigmata species exhibited the higher number Followed by Astigmata and Mesostigmata, while low numbers of the Prostigmata were recorded in the cultivated land and newly reclaimed area