Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Role of Stethours gilvifrons (Mulsant) as Biological Control Agents of the Two Spotted Spider Mite Tetranychus urticae Koch59627890310.21608/jppp.2020.78903ENFatma M.SalehPlant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.Amira E.MesbahPlant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.OLA M.RoshdyPlant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.Journal Article20200324Predaceous insects is an effective important biological control agents of feeding on <em>Tetranychus urticae</em> Koch and decreasing the number during 2018 season to study the optimal predator: prey ratios for the release of <em>Stethours gilvifrons</em> (Mulsant) sacond larvae and adult stage for controlling the <em>T. urticae</em> on cottonplants <em>Gossypium burbadense</em> L. The obtained results showed that the effective control was gained after 12 days from released the second larvae and adult of the <em>S. gilvifrons</em> predatorwhen the predator: prey ratios were 1:15and1:25 respectively. The regression analysis between predator: prey ratios of <em>S</em>. <em>gilvifrons</em> (larvae and adults) reduction percentages cleared that there were negatively high relationship of larvae and adult predators and prey ratios, which means that the reduction rate was increased with lower predator : prey ratios and vice versa .The results assured that the best control of <em>T.urticae</em> populations under semi field conditions was cleared by using the lower predator prey ratios (1:15 and 1:25) . Finally the predators can be used as biological control agents for <em>T.urticae </em>in cotten plantation under field conditions. The regression analysis between P: p ratios of <em>S. gilvifrons</em> adults and reduction percentage of the <em>T.urticae</em> mites , data showed there were negatively highly relationship of both predators larvae and adult which means that the reduction rate was increased with lower P: p ratios and vice versa.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Using Green Chemicals and Biological Control Agents for Controlling the Seed-Borne Pathogen Fusarium moniliforme in Sugar Beet63727890510.21608/jppp.2020.78905ENK. F. M.ShawkiPlant Pathology Research Institute, Agricultural Research Center, Giza, Egypt.A. B. B.ElsayedPlant Pathology Research Institute, Agricultural Research Center, Giza, Egypt.W. A. E.AbidoAgronomy Department, Faculty of Agriculture, Mansoura University, Egypt.Y. M.ShabanaPlant Pathology Department, Faculty of Agriculture, Mansoura University, EgyptJournal Article20200324Seeds of fifteen sugar beet (<em>Beta vulgaris</em> L<em>.</em>) cultivars were collected in 2018 and 2019 in Egypt and screened for their seed-borne mycoflora using deep-freezing blotter method. Among those fungi recovered from sugar beet seeds, a plant pathogen <em>Fusarium moniliforme</em> was the most dominant. Thus, it was tested for its pathogenicity and transmission against sugar beet plants. Green chemicals (antioxidants) and biological control agents were used for suppressing <em>F. moniliforme </em>in comparison with Fludioxonil/Mefenoxam (MaximXL 3.5% FS<sup>®</sup>; a chemical fungicide), Potassium silicate at concentrations (4, 6, 8, 10 and 12 ml/L), Nicotinic acid at concentrations (1, 5, 10, 15 and 20 mM/L), <em>Trichoderma harzianum, T. hamatum</em> and <em>Bacillus subtilis</em> were tested against <em>F. moniliforme</em> in vitro, in the greenhouse and in the field. The results assured that nicotinic acid at 5 mM/L, <em>T. harzianum</em> and <em>T. hamatum</em> and potassium silicate at 12 ml/L were the best treatments compared with the Maxim<sup>®</sup> fungicide (control). But nicotinic acid at 5 mM/L was the most effective among all treatments.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Assessment of Breeding Materials for Resistance to Fusarium Wilt in Cotton under Greenhouse Conditions in 201973778598610.21608/jppp.2020.85986ENAmal A.AsranPlant Pathology Research Institute, Agricultural Research Center (ARC), Giza, EgyptM. T. M.MansourPlant Pathology Research Institute, Agricultural Research Center (ARC), Giza, EgyptM. S.KhalilPlant Pathology Research Institute, Agricultural Research Center (ARC), Giza, EgyptA. Z. A.AshourPlant Pathology Research Institute, Agricultural Research Center (ARC), Giza, EgyptS. M. E.ZayedPlant Pathology Research Institute, Agricultural Research Center (ARC), Giza, EgyptA. M. A.ElsamawatyPlant Pathology Research Institute, Agricultural Research Center (ARC), Giza, EgyptMarian M.HabebPlant Pathology Research Institute, Agricultural Research Center (ARC), Giza, EgyptK. A.Abd-ElsalamPlant Pathology Research Institute, Agricultural Research Center (ARC), Giza, EgyptA. A.AlyPlant Pathology Research Institute, Agricultural Research Center (ARC), Giza, EgyptJournal Article20200429The germplasm evaluated in this study was a part of the National Screening Program for Fusarium Wilt Resistance. This program is conducted annually in the glasshouses of (Cotton and Fiber Crops Diseases Research Dept.), PPRI. The current study included 50 of Lower Egypt experimental genotypes, this experimental genotypes and 931families of seven common cultivars. The investigational genotypes were supplied by Cotton Breeding Dept., while the families of the seven common cultivars were supplied by Cotton Research Institute . Healthy survival rate of seedlings of the genotypes was used as a criterion to evaluate their reactions when the genotypes were grown in autoclaved soil highly infested with a mixture of race 3 of <em>Fusarium oxysporum</em> f. sp. <em>vasinfectum</em> isolates. All the lower Egypt genotypes (100%) were very highly resistant. The majority of the Upper Egypt genotypes 68 % were very highly resistant while 4% were very highly susceptible. The other reaction classed ranged from 4 to 16% of the tested genotypes. The distribution of Upper Egypt genotypes to reaction classes in 2017, 2018 and 2019 showed steady and considerable increases in the VHR genotypes, which were 48, 54 and 68% in 2017, 2018 and 2019 respectively. Over the three year period, the majority (56.67%) of the Upper Egypt genotypes were VHR. . All families of the common cultivars were VHR. The present study provides new and useful sources of resistance to Fusarium wilt caused by race 3 isolatesMansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Effectiveness of Certain Biocides and Essential Oils in Controlling Damping-Off and Root-Rot Diseases of Soybean (Glycine max (L.) Merr.)79877890610.21608/jppp.2020.78906ENE. A. D.SarhanPlant Pathology Research Institute, Agricultural Research Center, Giza 12619, Egypt.0000-0002-9364-3966Journal Article20200324Damping-off and root-rot are some of the most important diseases attack soybean (<em>Glycine max</em> (L.) Merr.) in Egypt. The effect of biocides, i.e. Bio-Cure-F, Plant guard, and Rhizo-N, and essential oils of eucalyptus, thyme, and lemongrass oils, as well as the fungicide Vitavax-200, were evaluated <em>in vitro</em>, greenhouse and under field conditions during the two successive growing seasons, 2018 and 2019 to control damping-off and root-rot diseases of soybean. All the tested biocides and essential oils used significantly inhibited the linear growth of the tested pathogenic fungi, <em>i.e.</em>, <em>Fusarium moniliforme</em>, <em>Fusarium solani</em> and <em>Rhizoctonia solani</em> compared with the control. Under greenhouse and field conditions in both growing seasons, obtained results indicated that all the tested biocides and essential oils significantly reduced the percentages of soybean damping-off and root-rot severity furthermore improved photosynthetic pigments content, growth parameters, and seed yield. Vitavax-200 and Plant guard gave the highest values of reduction in this respect, followed by Rhizo-N, lemongrass oil, Bio-Cure-F, thyme oil, and eucalyptus oil respectively. Besides, the quality parameters of soybean seeds showed a favorable elevation in total oil content, on the contrary, there was a general decrease in the seeds protein content. However, the correlations between seeds oil and protein contents were negatively correlated. It could be concluded in biocides and essential oils examined can be recommended for biocontrol of soybean damping-off and root-rot diseases.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Functional Responses of Coccinella undecimpunctata and Chrysoperla carnea to their Aphid Prey under Semi-Field Conditions89957891210.21608/jppp.2020.78912ENRehab E.KhalilPesticides Department, Faculty of Agriculture, Mansoura University, B. O. Box 35516, Mansoura, EgyptF. A. H.ShaheenPesticides Department, Faculty of Agriculture, Mansoura University, B. O. Box 35516, Mansoura, EgyptA. A.Abdel-HadyPesticides Department, Faculty of Agriculture, Mansoura University, B. O. Box 35516, Mansoura, EgyptA. A.SalehPesticides Department, Faculty of Agriculture, Mansoura University, B. O. Box 35516, Mansoura, EgyptJournal Article20200324Understanding the interactions between predator and prey is the basis for creating a strategy for the biocontrol of aphids. One of the most informative methods to understand these interactions is the functional response. In this study, the predation efficiency, of the second-instars of <em>Coccinella undecimpunctata</em> L. and <em>Chrysoperla</em> <em>carnea</em> (Stephen) to <em>Aphis</em> <em>craccivora</em> and <em>Aphis gossypii</em> were evaluated. The experiments were carried out under semi-greenhouse conditions at predator: prey ratios ranging from 1: 20 to 1: 100 per cage. The decline in the predation rates with increasing density of <em>A.</em> <em>craccivora</em> by each of both predators fits the type II and type I functional responses for <em>C. undecimpunctata </em>and <em>C. carnea</em>, respectively. While, both predator species exhibited a type I responses to changing in <em>A. gossypii</em> densities<em>. </em>The type II functional response estimates showed that <em>C. carnea </em>had greatest attack rate and shorter handling time on <em>A.</em> <em>craccivora</em> than those for the type I of <em>C. undecimpunctata</em>. On <em>A. gossypii</em>, these values were better for <em>C. undecimpunctata </em>larvae than <em>C. carnea</em>. Theoretically, the highest number of prey that could be eaten by a single predatory larva of <em>C. undecimpunctata</em> and <em>C. carnea </em>within a day (<em>T/T<sub>h</sub></em>) was 18.31 and 9.30 of <em>A. craccivora</em>, and 24.89 and 16.91 of <em>A. gossypii</em>, respectively. Although, the type of response was generally a type I with a constant mortality rate regardless the prey density increased or not, this type might be turned to type II, on long-term, as the predator establishes.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Effect of Food on the Biological Aspects and Life Table Parameters of the Predatory Mite, Cheletogenes ornatus (Canestrini & Fanzago) (Acari: Cheyletidae)971017891410.21608/jppp.2020.78914ENOla M.RoshdyPlant Protection Research Institute, Agricultural Research Centre, Dokki, Egypt.Journal Article20200324Biological characteristics, life table parameters and predation rate of the predatory mite, <em>Cheletogenes ornatus</em> (Canestrini & Fanzago) (Acari: Cheyletidae) were studied when reared on eggs and immature stages of different types of food; the date scale insect, <em>Parlatoria blanchardii</em> (Targ.) and three phytophagous mite pests [<em>Tetranychus urticae </em>Koch(Tetranychidae), <em>Raoiella indica</em> Hirst (Tenuipalpidae) and <em>Acarus siro</em> Linnaeus (Acaridae)] under laboratory conditions. Females of the predatory mite passed through two nymphal stages before reaching adulthood, while predatory male passed through only one stage. <em>Cheletogenes ornatus </em>male and female fed successfully on the four tested preys mentioned previously. <em>Acarus siro</em> increased the oviposition period of <em>C. ornatus</em> females to 18.92 days with daily rate of deposited eggs 5.18 eggs/ day. So, <em>Acarus siro</em> seemed to be the most favorable prey for the predatory mite, <em>C. </em><em>ornatus </em>compared with other tested preys.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Intercropping of some Aromatic Plants with Sugar Beet, its Effects on the Tortoise Beetle Cassida vittata Vill. Infestation, Appearance Predators and Sugar Beet Yield1031108598710.21608/jppp.2020.85987ENI. F.KhafagyPlant Protection Research Institute, Sakha Agricultural Research Station, ARC, Kafr El-Sheikh, Egypt.M. A.SamyPlant Protection Research Institute, Sakha Agricultural Research Station, ARC, Kafr El-Sheikh, Egypt.Amal M.HamzaPlant Protection Research Institute, Sakha Agricultural Research Station, ARC, Kafr El-Sheikh, Egypt.Journal Article20200429These studies were carried out at the Experimental Farm at the Sakha Agriculture Research Station, Kafr El-Sheikh Region and Egypt during the two successive growing seasons; 2017/18 and 2018/19 to investigate the role of intercropping of Sugar Beet with four aromatic plants on the infestation with <em>Cassida. vittata</em> (vill.), the appearance predators and sugar beet yield. The four aromatic plants were Fennel, Dill, Coriander and Marjoram. Results showed that intercropping pattern reduced the infestation percentage with <em>C. vittata (</em>all stages),especially in case of Coriander with Sugar beet. Results showed that intercropping pattern with sugar beet increased the appearance numbers of predators especially in case of Fennel+ sugar beet. Results exhibited that dill intercropping with Sugar beet was highest attractive for <em>Coccinella </em>sp.. Intercropping between Fennel and Sugar beet was highest attractive to <em>Chrysoperla carnea </em>Stephens, as so coriander plants intercropping with sugar beet plants was more attractive to <em>Paederus alfierii </em>Koch. Results indicated that Marjoram intercropping with sugar beet was highest attractive for <em>Scymnus </em>spp < em>.. The highest abundance of true spiders was found on sugar beet plants intercropped with Fennel, followed by sugar beet with Marjoram. The highest sugar beet yield was obtained when sugar beet was intercropped with Fennel, followed by coriander.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Innovation of a New Trap, for Catching Mediterranean Fruit Fly, Ceratitis capitata (Wied.) and Peach Fruit Fly, Bactrocera zonata (Saund.) in Egypt1111147891610.21608/jppp.2020.78916ENE. F.GaziaPlant Prot. Res. Inst., Agric. Res. Center, Ministry of Agric., Egypt.Journal Article20200324The present investigation was carried out during two periods, from 28 May to 25 June and 18 November to 16 December 2019, conducted in orchards at El-Qanater_Elkhairia district, Qalubya Governorate. Field experiments evaluation of attracting both <em>Ceratitis capitata</em> (MFF) and <em>Bactrocera zonata</em> (PFF), to Gazia trap compared with two types of traps, Jackson and McPhail traps was, during the first period the attraction rate for Gazia trap recorded 61.72 and 50.5% males fruit flies of <em>C. capitata</em> and <em>B. zonata</em> comparing with Jackson traps, also recorded 30.39 and 59.39% fruit flies of <em>C. capitata</em> and <em>B. zonata</em> respectively comparing with McPhail traps. While the attraction rate for the Gazia trap during the second period recorded 23.4 and 9.75 males fruit flies of C<em>. capitata</em> and <em>B. zonata</em> comparing with Jackson traps. But when compared to McPhail traps, the results cleared 15 and 206.64% fruit flies of <em>C. capitata</em> and <em>B.zonata</em> respectively. 5% Bominal solution was the most attractive bait for MFF and PFF comparing with 3% of di-ammonium phosphate solution. Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Population Density of Soybean Piercing Sucking Pests in Relation to Varieties, Chlorophyll and some Weather Factors1151198598810.21608/jppp.2020.85988ENE. F.El-khayatplant prot. Dept., Fac. of Agric., Benha Univ., Egypt.Safaa M.Halawaplant prot. Dept., Fac. of Agric., Benha Univ., Egypt.H. A.SalehPlant Prot. Res. Inst., Agric. Res. Centre, Dokki. Giza, EgyptEsmat S. A.ZaghlolPlant Prot. Res. Inst., Agric. Res. Centre, Dokki. Giza, Egypt.Journal Article20200429Two field experiments were carried out at the experimental farm of the Faculty of Agriculture, Benha University, Qalubiya governorate during two seasons, 2015 and 2016. The experiments aimed to study susceptibility of five soybean varieties (Giza 21, Giza 22, Giza 35, Giza111 and Crawford) under natural infestation with piercing sucking pests mainly; <em>Bemisia tabaci</em> (Genna). <em> Aphis sp.,</em> and<em> Tetranychus urtica</em> (Koch). Also to investigate relationship between these pests and some climatic factors and leaflets characteristic. The obtained results showed that, <em>B. tabace</em> started to appear on the 4<sup>th</sup> week of June and reached the highest infestation was on 4<sup>th</sup> July. The infestation by <em>Aphis </em>and <em>T. urticae</em> appeared earlier on 3<sup>rd</sup> week of June and increased gradually until reached its peak on 3<sup>rd</sup> July. Susceptibility of the tested soybean varieties to infestation with the pests varied significantly between each other. Crawford variety had the highest infestation (susceptible), except Giza. 21 with <em>B.tabace</em> in the 2<sup>nd</sup> season. On the other hand, Giza 35 variety was more resistant with <em>Aphis</em> and <em>T. urticae</em>, the lowest infestation with <em>B. tabace </em>was found in Giza 22. Relationship among soybean cultivars, infestation level of temperature and humidity was significant. On the other hand, there was a negative significant relationship between the chlorophyll content and infestation with the pests.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Improving the Silk Industry by Studying the Effect of Several Aqueous Extracts to Enhance the Efficiency of Silkworm Bombyx mori L. Production1211268598910.21608/jppp.2020.85989ENMarwa N.MoustafaSericulture Res. Dept., Plant Prot. Res. Inst., Agric. Res. Center, Dokki, Giza.Journal Article20200429Mulberry leaves have a high nutritional value for larval silkworm so fortification with plant and animal extracts that contain antioxidant and phytochemical properties and amino acids improve the sericultural industry. Data cleared that, Mulberry leaves that fortified with 2.5% <em>Aloe Vera</em> recorded the highest value in all traits significantly. Although, Taurine with a recommended dose showed the high value in all biochemical analyses after <em>Aloe Vera </em>the results differed in biological and cocoon traits. Also, <em>Moringa oliefera</em> 2% registered high value in biological and cocoon traits after <em>Aloe vera </em>and some biochemical analysis after <em>Aloe vera </em>and Taurine. From the previous results 2.5% <em>Aloe vera </em>is more effective in all parameters than any aqueous extracts understudied.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Could Organic Pesticides Be a Good Alternative to Synthetics in Controlling Aphids and Leafhoppers in Tomato Fields?1271348458310.21608/jppp.2020.84583ENHala A.Central Laboratory for Organic Agriculture, ARC, EgyptS. A.GaffarCentral Laboratory for Organic Agriculture, ARC, EgyptJournal Article20200421We aimed in this investigation to prove that organic pesticides (neem oil and a mixture of cottonseed and sunflower oil) can replace synthetics (malathion) in controlling aphids and leafhoppers attacking tomato under field conditions. The experiment was laid out in a randomized complete block design, during two successive seasons; 2018 and 2019 in a total area of 0.5 ha. Both yellow sticky traps and plant sampling methods were used. Data analyses revealed that the mixture of cotton and sunflower oil gave the highest control levels of both leafhoppers and aphid <em>Myzus persicae</em> (Sulzer). Leafhoppers were much more susceptible to all the applied compounds than aphids. Oil mixture proved to be either higher or equal to malathion in its efficiency. Neem oil was less efficient on both pests than malathion. Effectiveness of all tested compounds highly decreased after 14days post treatment. The highest control levels of both pests occurred after three consecutive treatments. Accordingly, cottonseed oil mixed with sunflower oil is very promising in controlling those two pests and can replace malathion in IPM programs in tomato fields in Egypt, taking into consideration repeating the application for three consecutive times with maximum one week between sprayings. Thus, the answer to the study title according to our research is “yes they could” provided that farmers’ awareness is raised concerning shifting towards those organic compounds and training them on using such safe, eco-friendly and cost effective natural products is taking into consideration to achieve agricultural sustainability.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Influence of Magnetic Field on some Biological And Biochemical Aspects of Silkworm, Bombyx mori1351407999510.21608/jppp.2020.79995ENEnas M. Y.ElyamaniPlant Protection Research Institute, Agricultural Research Center, Dokkii 12622, EgyptJournal Article20200401The application of 180 milli-tesla (ml.t) on larvae of silkworm, Bombyx mori L. (Lepidoptera: Bombycidae) was investigated to assess the effect of its different exposure periods; 1, 2, 4 and 8 minutes on some biological traits and haemolymph biochemical constituents. The magnetization each of the third and the fourth larval instar was carried out once on the first day before first feeding. Exposing silkworm larvae during each of the third or the fourth instars to the tested magnetic field for eight minutes increased mature larval weight followed by four minutes magnetization during both instars. Control group and the larvae exposed to the magnetic field for eight minutes manifest the highest cocoon shell weight of the resulting cocoons. Silk ratios were significantly higher in two minutes exposure to the magnetic field during the fourth larval instar followed by one minute exposure during the third larval instar. Variation in the exposure periods of the magnetic field remarkably influenced the biochemical component of the haemolymph of mature silkworm larvae. Stimulatingly, Alanine amino transferase activity, total protein content and Amylase activity were highest in haemolymph of the larvae exposed to the tested magnetic field during the third or the fourth larval instar for eight minutes, while Aspartate amino transferase activity and total lipid content were found to be the highest in the haemolymph samples taken from larvae exposed to the same magnetic field during the third larval instar for four and eight minutes, respectively.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Study the Toxicity of Three Benzothiazole Compounds Formulated as 10 % Suspension Concentrate against Cotton Leafworm Spodoptera littoralis (Boisd)1411467999810.21608/jppp.2020.79998ENR. A.El-SharkawyPesticides Evaluation Research Department, Plant Protection Research Institute, Agriculture Research Center (ARC), Dokki, Giza, EgyptM. A.EskanderFormulation Research Department, Central Agricultural Pesticides Lab. (CAPL), Agriculture Research Center (ARC), Dokki, Giza, EgyptAmal A.Abd- AllahPesticides Evaluation Research Department, Plant Protection Research Institute, Agriculture Research Center (ARC), Dokki, Giza, EgyptJournal Article20200401Three compounds of benzothiazole were synthetized as active ingredient and prepared as 10 % suspensions concentrate (SC). They were evaluated against the second and fourth instar larvae of the cotton leafworm <em>S. littoralis (Boisd.)</em>, under laboratory conditions. LC<sub>50</sub> values showed that formulation (1) gave the highest toxic effect against 2<sup>nd</sup> and 4<sup>th</sup> instar larvae after 48 hrs from treatment and gave the best effect as antifeedant followed by formulation (3) and formulation (2). Semi field experiment was done to evaluate the initial and latent effects of the formulated compounds compared with commercial insecticide chlorpyrifos 48% EC (Dursban), the results showed that formulation (1) gave 100 % prevention of adult emergency due to the high initial and latent effects and lowest pupation percentage as the same as chlorpyrifos followed by formulation (3) and formulation (2) with the 2<sup>nd</sup> and the 4<sup>th</sup> instar larvae. Whereas Formulation (1) at 1 % is already as the same of recommended insecticide chlorpyrifos, therefore it could be recommended to use the new formulations as alternative of hazard conventional insecticides in controlling cotton leafworm in different crops after conducting the other necessary open field experiments. Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Effect of some Insecticides on Pink Bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae), Associated Predators in Cotton Field and some of their Biochemical Effects1471518459410.21608/jppp.2020.84594ENA. A.El-SayedPlant Protection Research Institute, Agriculture Research Center (ARC) , Dokki Giza, Egypt.A. E. A.AmerPlant Protection Research Institute, Agriculture Research Center (ARC) , Dokki Giza, Egypt.Eman M.Abd-ElAzeemPlant Protection Research Institute, Agriculture Research Center (ARC) , Dokki Giza, Egypt.Journal Article20200421Efficiency of profenofos, chlorpyrifos and alpha-cypermethrin against <em>Pectinophora gossypiella</em> and their associated predators in cotton field at Zagazig, Sharkia Governorate. Alpha-cypermethrin increased mean seasonal reduction percentages (92.92%), while, profenofos decrease it (78.38%). Alpha-cypermethrin caused the highest mean seasonal reduction percentages in the Coccineledae, <em>Chrysoperla carnea</em> and True spider predators (88.26, 73.67 and 85.70%, respectively). The pupal mortality percentage increased while, pupal duration, adult emergency percentage, pupal weight, pupation percentage, deposited eggs and hatchability percentage decreased. The activity of trehalase, invertase and acetylcholine esterase enzymes decreased but of amylase and AST (Aspartate aminotransferase) increased. Disturbance recorded in ALT (Alanine aminotransferase) enzyme, total lipid and total soluble protein content relative to control.Mansoura University, Faculty of AgricultureJournal of Plant Protection and Pathology2090-367711220200201Comparative Efficiency of Certain Products against some Piercing-Sucking Pests and their Associated Predators on Cotton Plants1531598000010.21608/jppp.2020.80000ENA. A. A.Abd El-HadyPlant Protection Research Institute, Dokki, Giza.F. A. H.El-Din ShaheenPesticides Department, Faculty of Agriculture, Mansoura University.A. A.SalehPesticides Department, Faculty of Agriculture, Mansoura University.A. M.HamidPlant Protection Research Institute, Dokki, Giza.Journal Article20200401The present research work aimed to evaluate the efficacy of five different products, two biocides (abamectin and protecto), two synthetic chemical products (methomyl and chlorpyrifos) and one mineral oil (Kz-oil) against some piercing-sucking insect pests attacking cotton plants and their side effects on the associated predators. The experiment was conducted during 2017 season at Kafr ElShenhab village, Mansoura district by using cotton variety Giza 94. From results were obtained, it is obvious that methomyl and chlorpyrifos were more effective as initial kill (72.2 and 68.2%), (66.4 and 51.9%) and (60.1 and 78.9%) for aphid, whitefly and predators respectively. But Kz-oil (61.4%) and abamectin (62.9%) were more effective against jassid and spider mites respectively as initial kill% (after 24 hrs. of treatment) effect, whereas a moderate or less initial kill effect ranged from 32.7 to 51.9% was recorded for the other products. In contrast, abamectin, protecto and Kz-oil were more safety against associated predators as initial kill as follows: 12.2, 9.5 and 12.5% respectively. With respect of residual mean and general mean effect, abamectin, protecto and Kz-oil were relatively highly effective against aphids (65.0, 63.3 and 61.6%) as residual mean and (61.8, 60.4,and 59.5%) as general mean effect and against jassids by moderate effect (50.3, 51.4 and 57.7%) as residual mean and (48.7, 48.3 and 58.3%) as general mean effect respectively. While other tested products recorded a weak effect as residual mean and general mean effect against all piercing sucking insects except both methomyl and chlorpyrifos were highly effective against predators (78.0 and 48.9%) and (75.0 and 53.9%) as residual mean and general mean effect respectively.