Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-36778120170101Tritrophic Interaction Between Leguminous Crops, Aphid Species and Foraging Behavior of Lady Beetles.164613010.21608/jppp.2017.46130ENA. Abd El-KareimEconomic Entomology Dept., Fac. of Agric., Mansoura Univ., Egypt.M. E.El-NaggarAgric. Res. Center (ARC), Ministry of Agriculture, Egypt.Salma Kh. R.MohammadAgric. Res. Center (ARC), Ministry of Agriculture, Egypt.Journal Article20190828Foraging behavior of some coccinellid predators (<em>coccinella</em><em>.</em> <em>Undecinpunctata </em>L<em>,, Coccinella septempunctata </em>L<em>.</em> and <em>Cydoina vicina isis </em>L<em>.</em>) in response to different host plants (cowpea, white bean and broad bean) and prey species ( <em>Aphis gossypii</em> (Glover.)<em> , Myzus persicae</em> (Sultzer.) and <em>Aphis fabae</em> (Scop.) ) were evaluated under laboratory conditions. The lady beetles exhibited different searching rate and matual interferace values in response to differant host plant and prey species. However , the searching rate of <em>C. undecimpunctata</em> adults was higher on <em>A.</em> <em>gossypii</em> than on <em>M. persicae</em> and <em>A. fabae</em> especially those reread on cowpea plants. While, <em>C.</em> <em>septumpunctata</em> showed the higher searching rate on <em>M. persicae</em> than <em>A. fabae</em> and <em>A. gossypii</em> ,especially on white bean .On contrary, the highest searching rate of the black lady beetles was recorded on <em>A. fabae</em> and <em>M. persicae</em> reared on white bean (0.769, 0.701 )or broad bean ( 0.746, 0.708) in comparison with A.<em> gossypii</em>. The eleven spotted lady beetles recorded relatively higher mutual interference values in comparison with those of seven- spotted or black lady beetle adults, especially on cowpea plants . The present study revealed that the highest searching rate with relatively low mutual interference value for <em>C. undecimpunctata</em> (0.763, 1.881), <em>C. septumpunctata</em> (0.781, 1.626) and <em>C. vicina isis</em> (0.769, 1.684) were recorded on ( <em>A. gossypii</em> reared on cowpea ), (<em>M. persicae</em> reared on white bean) and (<em>A. fabae</em> reared on white bean ), respectively. Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-36778120170101Semiochemicals and Tritrophic Interaction Among Leguminous Plants, Aphids and Coccinellid Predators7134613110.21608/jppp.2017.46131ENA. I.Abd El-KareimEconomic Entomology Dept., Fac. of Agric., Mansoura Univ., Egypt.M. E.El-NaggarAgric. Res. Center (ARC), Ministry of Agriculture, EgyptSalma Kh. R.MohammadAgric. Res. Center (ARC), Ministry of Agriculture, EgyptJournal Article20190828<strong> </strong>
Chemical communication between the leguminous plants (cowpea, white bean and broad bean), aphids (<em>Aphis gossypii</em>, <em>Aphis. fabae</em> and <em>Myzus persicae</em>) and the coccinellidspecies (<em>Coccinella. undecimpunctata L., Coccinella. Septempunctata L.</em> and <em>Cydonia. vicina isis L.</em>) was evaluated under laboratory conditions(at 26 ± 2.5 ◦C and 68 ± 4.5 RH%). Lady beetles exhibited different degrees of preference to volatile oil extracts of the different tested host plants. However, volatile oils emitted from broad bean attracted the highest percent of both <em>Cyd. vicina isis </em>and <em>C. undecimpunctata</em>, while, <em>C. septempunctata </em>showed preference to white bean oil. On the other hand, all tested predators showed no response to oil extracts from cowpea plants. Broad bean and white bean plants damaged by feeding activity of <em>A. gossypii</em> produced volatile chemicals (synomones) that attracted all tested predators, While, <em>C. septempunctata</em> and <em>Cyd. vicina isis</em> adults only elicited positive response to damaged cowpea plants. Also, feeding by <em>M. persicae</em> or <em>A. fabae </em>on broad bean and white bean seedlings was sufficient to elicit emission of volatiles that attract all predator species in comparison with undamaged leaves. On contrary, all tested predators showed similar response to both damaged and undamaged cowpea seedling. Hexane approved to be the best solvents for kairomone extraction from <em>A. gossypii, Myzus persicae </em>and <em>A. fabae</em> for Cyd<em>. Vicina</em> <em>isis</em>, while acetone was the best one to extract kairomone of all aphid species for <em>C. undecimpunctata.</em>Meanwhile, <em>C. septempunctata</em> adults exhibited positivel response to hexane extract of both,<em> Myzus persicae </em>and <em>A. fabae, </em>and to acetone extracts from<em> A. gossypii</em>Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-36778120170101The Population Abundance of the Mealybug Species Infesting Pomegranate Trees and their Associated Insect Predators in Mansoura Region, Egypt15194613210.21608/jppp.2017.46132ENHagar S. S.AwadallaEconomic Entomology Dep. Faculty of Agriculture, Damietta University, EgyptJournal Article20190828Experiments were carried out in the experimental farm belonging to Faculty of Agriculture, MansouraUniversity during the two successive years 2014 and 2015 to study the population abundance of mealybug species attacking pomegranate trees and their associated predatory insects. The seychelles fluted scale Icerya seychellarum (Westwood) recorded the highest peaks of abundance during the period of study and represented by 367 and 568 individuals/sample followed by the citrus mealybug Planococcus citri Risso which represented by 192 and 242 individuals, respectively. Meanwhile, the cottony- cushion scale Icerya purchasi (Maskell) recorded the lowest peaks of abundance during the two years of study and represented by 46 and 29 individuals followed by the Egyptian fluted mealybug Icerya aegyptiaca (Douglus) which represented by 58 and 98 individuals, respectively. Vidalia beetle Rodolia cardinalis (Mulsant) recorded the highest peaks during the two successive years and represented by 42 and 57 individuals followed by the green lacewing Chrysoperla carnea (Steph.) and represented by 32 and 29 individuals, respectively. Meanwhile, coccinellid predator Nephus includens (Kirsch) ranked last category, and represented by 12 and 16 insects in the two years, respectively. Statistical analysis between the four seasons for the mealybug species revealed that a highly significant differences during the two years. I. seychellarum recorded the highest average number 110.3 and 158.6 individuals/sample, followed by P. citri 74.2 and 87.9 individuals while I. purchasi came in the last category with an average of 9.4 and 6.0 individuals, during the two successive years, respectively. Regarding to the associated insect predators, R. cardinalis ranked the first category and represented by 60.6 and 69.4% followed by C. carnea 30.4 and 22.7 % while N. includens came in the last category with 9.0 and 7.9% during the two successive years, respectively. Predator-prey ratio was the best during the period from July tell December and ranged between 1: 4.7 and 1: 10.6 during the two years.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-36778120170101Effect of Different Prey on Biological Aspects , Fecundity and Life Table Parameters of the Predatory Mite ,Cheletomorpha lepidopterorum Shaw (Acari:Actinidida:Cheyletidae)21254613310.21608/jppp.2017.46133ENAmira E.MesbahPlant Protection Research Institute, A.R.C, Dokki, Giza, Egypt.Alyaa A.TawfikPlant Protection Research Institute, A.R.C, Dokki, Giza, Egypt.Doaa A.Abou El-AttaPlant Protection Research Institute, A.R.C, Dokki, Giza, Egypt.Fatma M.SalehPlant Protection Research Institute, A.R.C, Dokki, Giza, Egypt.Journal Article20190828The biology of Cheyletid mite, <em>Cheletomorpha lepidopterorum</em> (Acari: Cheyletidae) on three different immature stages of two acarid mites, the seed wheat mite<em> ,Goheria wahabeii</em> El-Naggar,Taha& Hoda and the storage grain mite<em>, Blomia tropicalis</em> Bronswijk and also the Tetranychid Brown wheat mite, <em>Petrobia latens</em> (Muller) was conducted at 20 ⁰C and 60% R.H in the laboratory. Acarid mites used as faclitious food for mass rearing this predator.<em> Ch. lepidopterorum</em> showed a higher fertility 97 egg on immature stages of <em>G. wahabei</em><em>i</em> as food than on other tested preys. <em>Predator </em>has a high predation capacity when fed on immature stages of <em>P. latens</em> ; <em>B. tropicalis</em> and <em>G.wahabeii</em> ,respectively. Food consumption during predator total immatures averaged (25.2 ; 35.1 and 70 prey) for predator male and (50 ; 71.6 and 103 prey) for predator female when fed on immature stages of aforementioned prey, respectively; while, during life span predators consumed (154.7; 166.1 and 265.5 prey) for male and(200; 242 and 342 prey) for female on the same preys, respectively. Life table parameters showed that the highest intrinsic rate of natural increase (r<sub>m</sub>) was reached as 0.206 when fed on immature stages of <em>G. wahabei</em><em>i</em> which considered as the optimal prey for this mite. Lower r<sub>m </sub>value as 0.177was obtained when fed on immature stages of <em>P. laten</em>. Time for population doubling was determined as( 3.93, 3.34 and 3.42) at different studied prey, respectively. The results indicate the possibility of using some Acaridida species; <em>B. tropicalis</em> and <em>G.wahabeii</em> for the mass-rearing of Cheyletid mite, <em><em>Ch. lepidopetrorium</em></em> potentially fostering wider use as biocontrol agents for Astigmatid and Phytophagous mites. Complementary studies for that species, as other factors could influence the suitability of these prey as food sources.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-36778120170101Comparative Effectiveness of Some Insecticide Treatments Against Citrus Leafminers, Phyllocnistis citrella (Stainton),on Mandarin Orchard at Nubareya District, Beheira Governorate27294613410.21608/jppp.2017.46134ENAnas A.AhmedPlant Protection Research Institute, Alex. EgyptJournal Article20190828Citrus leaf miner (CLM), Phyllocnistis citrella (Stainton) is one of the most common insect pests infesting mandarin orchards. The present study was carried out to evaluate some insecticides (Proclaim-Vertemic-Radiant-Mospilan-Runner) treatments in mixture with a mineral oil against larval and pupal stages of the leaf miner to find out the effective treatment in controlling the CLM. Results revealed that, Proclaim / Chemisol mixture (92.9%) achieved the highest reduction percentage in CLM serpentine mines, which is followed by Vertemic / Chemisol (88.3) and Radiant / Chemisol (88.2) in 2014 season. In 2015, Proclaim / Chemisol (88.2) and Radiant / Chemisol (86.5) mixtures achieved the highest reduction percentage in CLM serpentine mines. Mospilan / Chemisol (85.1) mixture achieved the lowest reduction percentage in P. citrella serpentine mines in 2014. Runner / Chemisol mixture achieved the lowest reduction percentage in P. citrella serpentine mines in 2015. Percent reduction of CLM larvae were 95.1, 90.1, 87.1, 84.3 and 81.4% in 2014 and 89.6, 86.5, 83.1, 82.7 and 78.9 in 2015, after treatment by the mixture of Chemisol with each Proclaim, Vertemic, Radiant, Mospilan and Runner, respectively. In respect with the effect of the insecticide treatments on the CLM pupae, Vertemic / Chemisol mixture (86.3 and 86.6%) achieved the highest reduction percentages followed by Proclaim / Chemisol mixture (83.9 and 83.4%) in both seasons 2014 and 2015. Runner / Chemisol mixture (77.5 and 76.0%) achieved the least reduction percentage of CLM pupae in both seasons 2014 and 2015.