Arab Journal of Plant Protection最新文献

{"title":"Effect of Tomato Yellow Leaf Curl Virus Infection on Some Growth Indicators of Pepper Hybrids Grown Under Plastic House Conditions in Lattakia Governorate, Syria","authors":"R. Hamdan, I. Ismail, Insaf Akel","doi":"10.22268/ajpp-39.4.309316","DOIUrl":"https://doi.org/10.22268/ajpp-39.4.309316","url":null,"abstract":"Hamdan, R.S., I.D. Ismail and I. Akel. 2021. Effect of Tomato Yellow Leaf Curl Virus Infection on Some Growth Indicators of Pepper Hybrids Grown Under Plastic House Conditions in Lattakia Governorate, Syria. Arab Journal of Plant Protection, 39(4): 309-316. https://doi.org/10.22268/AJPP-39.4.309316 This study aimed to evaluate the effect of Tomato yellow leaf curl virus (TYLCV) infection on some growth parameters of several pepper hybrids grown under protected cultivation along the Syrian coast. Four pepper hybrids (Capsicum annum) were tested, two hot (Lahab, Sirad) and two sweet (Nevada, Dallas) peppers. The research was carried out during the 2020-2021 growing season in a plastic house at the Agriculture Scientific Research Center in Lattakia, using a randomized complete block design, with 8 treatments, three replicates and 5 plants per replicate. The results obtained showed that the sweet pepper hybrids (Nevada, Dallas) were more sensitive to infection with Tomato yellow leaf curl virus than the hot pepper hybrids (Lahab, Sirad), without significant differences among them. The pepper hybrid Nevada did not show any apparent symptoms, and the effect of the virus on some growth parameters (number flowers, flower setting, and the leaf surface area) was evident in comparison with other hybrids, but the differences were not significant. The Dallas, Sirad and Lahab pepper hybrids showed visible symptoms in response to infection with infection rate of 93.33%, 80% and 80%, respectively. The effect of virus infection on the growth parameters of these hybrids was variable. The reduction in the flowers number of Nevada, Dallas, Cirad and Lahab after 45 days of infection was 33%, 31.10%, 10.23% and 5.07%, respectively, and also with a reduction in the number of flowers setting of 77.39%, 20.87%, 23.33% and 66.68%, respectively. The same was true for the leaf surface area, where reduction rate for the Nevada, Dallas, Sirad and Lahab hybrids 30 days after infection was 48.17%, 53.06%, 16.45% and 36.6%, respectively. Keywords: Tomato yellow leaf curl virus, pepper hybrids, growth parameter, host resistance, protected agriculture.","PeriodicalId":37670,"journal":{"name":"Arab Journal of Plant Protection","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48747315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation Efficiency of Different Isolate of Actinomycetes for Control of Cucumber Seedling Damping-off Disease Caused by Rhizoctonia solani (Khun)","authors":"Mohamad Amer Fayyadh, Lina K. Awad","doi":"10.22268/ajpp-39.4.281288","DOIUrl":"https://doi.org/10.22268/ajpp-39.4.281288","url":null,"abstract":"Fayyadh, M.A. and L.K. Awad. 2021. Evaluation Efficiency of Different Isolate of Actinomycetes for Control of Cucumber Seedling Damping-off Disease Caused by Rhizoctonia solani (Khun). Arab Journal of Plant Protection, 39(4): 281-288. https://doi.org/10.22268/AJPP-39.4.281288 This study was conducted in Plant Protection Department, College of Agriculture, University of Basrah during the period 2017-2018 aimed to isolate and identify Actinomycetes from different environmental sources and evaluate their efficiency to control cucumber damping off disease caused by Rhizoctonia solani. 28 isolates of Actinomycetes were isolated from different sources from the Basrah region. All such isolates were gram positive, amylase and catalase positive and they had branched hyphae. Molecular identification following amplification of 16sRNA confirmed that Actinomycetes isolate No 6 isolated from soil had a similarity of 99% with Streptomyces griseus, whereas the isolate No 66 isolated from date palm roots had a similarity of 99% with Brevibacterium celere. The nucleotide sequence of the two isolates has been deposited at NCBI with Genbank accession number LC501385.1 for S. griseus and LC501386.1 for B. celere. The dual culture technique showed that Actinomycetes isolates S. griseus and B. celere had high antagonistic activity against Rhizoctonia solani, which produced inhibition zones of 7 and 15 mm in dimeter, respectively. On the other hand, volatile compoundsreleased from S. griseus and B. celere inhibited the growth of R. solani by 68 and 81.5%, respectively. Pot experiment showed that all actinomycetes isolates significantly reduced cucumber seedling damping–off incidence caused by R. solani. Keywords: Actinomycetes, Rhizoctonia solani, Cucumber, Biological Control","PeriodicalId":37670,"journal":{"name":"Arab Journal of Plant Protection","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44463313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Spraying Glyphosate Herbicide on Solanum elaeagnifolium in Uncultivated Fields and on Physicochemical and Biological Soil Characteristics","authors":"Faten Bakkour, Anwar Meamar, Zakaria El- Naser","doi":"10.22268/ajpp-39.4.296308","DOIUrl":"https://doi.org/10.22268/ajpp-39.4.296308","url":null,"abstract":"Bakkour, F., A. El-Meamar and Z. El-Naser. 2021. Effect of Spraying Glyphosate Herbicide on Solanum elaeagnifolium in Uncultivated Fields and on Physicochemical and Biological Soil Characteristics. Arab Journal of Plant Protection, 39(4): 296-308. https://doi.org/10.22268/AJPP-39.4.296308 Glyphosate herbicide is used in uncultivated fields infested with Solanum elaeagnifolium plants several times a year in all Syrian governorates by the Ministry of Agriculture. This research aimed to study the effect of repeated spraying of glyphosate in uncultivated fields in five different locations in the Syrian governorates, Deir Ezzor (Tebni), Aleppo (Dakwani), Hama (Bostan AL-Omahat), Homs (ALZahoria) and Rural Damascus (Bohter) during the period 2017-2020, on the physiochemical and biological characteristics of the treated soils. Herbicide residues were measured in the leaves of the treated Solanum elaeagnifolium plants and in the soils surrounding the roots of the Solanum elaeagnifolium plants. It was found that the repetition of the pesticide spray 3 and 6 times during the study period did not alter the physical composition, salinity, pH and calcium carbonate content in all study locations. Whereas, spraying glyphosate 3 and 6 times increased the percentage of organic matter and phosphorus available, with a significant difference with the control. The values of available phosphorous after 6 pesticide spray applications reached 176, 203, 196, 227 and 205 mg/kg of soil in Deir Ezzor, Aleppo, Hama, Homs and Rural Damascus, respectively. In addition, repeated spraying with glyphosate of the treated soils led to increase the average general bacteria and fungi populations. These indicators were increased with the increase in the number of pesticide sprays applied. Furthermore, the pesticide residues increased in the soil and Solanum elaeagnifolium leaves with the increase in number of pesticide sprays. Pesticide residue values after 6 sprays were 1.72, 3.53, 4.89, 4.43 and 2.29 mg/kg of soil in Deir Ezzor, Aleppo, Hama, Homs and Rural Damascus locations, respectively. Keywords: Glyphosate, S. elaeagnifolium, residues, microorganisms, soil.","PeriodicalId":37670,"journal":{"name":"Arab Journal of Plant Protection","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43626814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measuring Adoption of Integrated Pest Management Practices by Citrus Farmers in Tartous Governorate, Syria","authors":"S. Faskha","doi":"10.22268/ajpp-039.4.257267","DOIUrl":"https://doi.org/10.22268/ajpp-039.4.257267","url":null,"abstract":"Faskha, S.M. 2021. Measuring Adoption of Integrated Pest Management Practices by Citrus Farmers in Tartous Governorate, Syria. Arab Journal of Plant Protection, 39(4): 257-267. https://doi.org/10.22268/AJPP-039.4.257267 A questionnaire study was conducted to analyze the IPM adoption by citrus farmers in Tartous Governorate during two seasons (2018 and 2019). The questionnaire was designed to collect the required information from a representative sample of farmers (370 farmers). Responses were tabulated, and the extracted data were statistically analyzed by using Chi–Square (X 2 ) at P=0.05. The results obtained indicated that the mean rate of farmer adoption was 5.55 points based on a 10-point scale. Accordingly, practices of the surveyed farmers came in the third level: “IPM level” (based on a proposed scale for adoption consisting of four levels, namely, conventional control, entry level IPM, normal IPM level, and bio-intensive IPM level). The implemented cultural practices, the handling of pesticides, and farmers' knowledge were at the forefront of good practices with mean index of attribute values of 0.66, 0.72 and 0.85, respectively. On the other hand, the Adoptability Index values showed that the non-use of attractant traps, planting mixed varieties, and voluntary lack of commitment to stop spraying (conservation biological control) were -0.46, -0.44 and -0.75, respectively, and those were among the most negative indicators in IPM practices adoption, although 31.35% of farmers did not use chemical control. Keywords: Integrated pest management, IPM, adoption, citrus, Syria.","PeriodicalId":37670,"journal":{"name":"Arab Journal of Plant Protection","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48959699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of the Maximum Appearance Period of Capnodis tendebrionis in Al-Sweida-Syria Governorate and Testing the Efficacy of Some Pesticides on the Pest Adults","authors":"Mazen Bufaur, Safwat Al-Gkhami, Rami Bou Hamdan, Waed Ghanem, Maher Dawara","doi":"10.22268/ajpp-39.4.268272","DOIUrl":"https://doi.org/10.22268/ajpp-39.4.268272","url":null,"abstract":"Bufaur, M., S. Al-Gkhami, R. Bohamdan, W. Ghanem and M. Dawara. 2021. Determination of the Maximum Appearance Period of Capnodis tendebrionisin Al-Sweida-Syria Governorate and Testing the Efficacy of Some Pesticides on the Pest Adults. Arab Journal of Plant Protection, 39(4): 268-272. https://doi.org/10.22268/AJPP-39.4.268272 A weekly adults collection of Capnodis tendebrionis L. (Buprestidae; Coleoptera) was conducted for two seasons (2018, 2019) to determine the maximum insect adults appearance period. Early adult appearance was recorded in the first year in warm-dry months as compared to the second year in cold-wet months. Maximum insect adults appearance was recorded at the end of April during the first season and at the end of May in the second season. A field experiment was carried out to test the efficacy of some pesticides on controlling pest adults: Deltamethrin, 100g/l, Chlorpyriphos-ethyl 48% and Acetamiprid 20% as a foliar spray, and Deltamethrin 0.25% as dusting powder around the stem, in addition to the control. Results obtained showed that Chlorpyriphos-ethyl and the two Deltamethrin treatments were the best on adults and with significant differences compared with Acetamiprid treatment following the first and the second week after spraying in 2018, and the Deltamethrin as dusting powder and Chlorpyriphos-ethyl treatments were the best and with significant differences compared to other treatments were observed. Using Deltamethrin as dusting powder around the stem was highly efficient during three weeks after spraying as compared with other treatments in the two years. Keywords: Capnodis tendebrionis L., Maximum adult appearance period, Deltamethrin, Chlorpyriphos- ethyl and Acetamiprid","PeriodicalId":37670,"journal":{"name":"Arab Journal of Plant Protection","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43565656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification of Fusarium oxysporum f. sp. ciceris Physiological Races in Chickpea Cultivated Areas in Al-Ghab Region, Syria","authors":"Leila Allouch","doi":"10.22268/ajpp-39.4.231240","DOIUrl":"https://doi.org/10.22268/ajpp-39.4.231240","url":null,"abstract":"Alloush, L., S. Al-Maghribi and B. Barhom. 2021. Identification of Fusarium oxysporum f. sp. ciceris Physiological Races in Chickpea Cultivated Areas in Al-Ghab Region, Syria. Arab Journal of Plant Protection, 39(4): 231-240. https://doi.org/10.22268/AJPP-39.4.231240 Fusarium wilt disease caused by Fusarium oxysporum f. sp. ciceris is one of the diseases that cause significant economic losses to the chickpea crop around the world, as infection with FOC can occurs during the different stages of plant growth. One of the best approaches to reduce the damage caused by FOC is by using resistant chickpea varieties. Hence, this study aimed to determine the physiological races of 25 FOC isolates collected from 20 agricultural sites belonging to six regulatory zones in the Al-Ghab region in Syria, based on their pathogenicity on 13 differential chickpea cultivars (C-104, JG -74, CPS-1, BG-215, BG-212, WR-315, Anniger, Chaffa, ILC482, L-550, K850-3/27, UC-27). The study was carried out during 2020 at the Agricultural Scientific Research Center in Al-Ghab. The results obtained showed that the tested isolates belong to races 0, 1B/C, 2, 3, 5, and 6. This is the first report of races 2 and 3 in Syria, and each of them constituted 28% of the total tested isolates, whereas 24% of the isolates were represented by race 0, and both races 5 and 1B/C occurred at 8% frequency, and race 6 included one isolate obtained from Abu Faraj site. Keywords: Chickpea, vascular wilt, physiological races, pathogenicity, Al-Ghab, Syria","PeriodicalId":37670,"journal":{"name":"Arab Journal of Plant Protection","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41874717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Toxicity of Nitenpyrem and Neem Oil Against Amrasca biguttula biguttula in Okra","authors":"Zulnorain Sajid, M. Haq, Qasim Farooq, Y. Sultan, Usama Sher, M. Tayeb, M. Ramzan","doi":"10.22268/ajpp-039.3.210214","DOIUrl":"https://doi.org/10.22268/ajpp-039.3.210214","url":null,"abstract":"The Jassid, Amarasca bigutulla bigutullaa is an important sucking pest of the okra crop. An experimental study was conducted during 2018 to check the comparative toxicity of nitenpyrem and neem oil against jassid under okra field conditions. The study revealed that 24 hours after treatment, nitenpyrem was found more toxic and effective with maximum reduction of jassid population (72.15%). Whereas, 120 hours after treatment with 4% neem oil, 15.05% jassid reduction was observed. The mortality rate of the jassid was increased with increasing in time after application of chemical insecticides. The study concluded that insecticide was most toxic and gives higher mortality of jassid as compared to neem oil. Keywords: Abelmoschus esculentus, Malvaceae, Amarasca bigutulla bigutullaa, botanicals, insecticides, Pakistan","PeriodicalId":37670,"journal":{"name":"Arab Journal of Plant Protection","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43294278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Isolation and Identification of Some Biocontrol Fungi and Evaluation of Their Efficacy Against Charchol Rot Disease Caused by Macrophomina phaseolina on Mung Bean","authors":"Abdel Nabi A.A Matrood, Hala A. Abdulhassan, Mohamad Imad Khrieba, M. Amin","doi":"10.22268/ajpp-39.3.197203","DOIUrl":"https://doi.org/10.22268/ajpp-39.3.197203","url":null,"abstract":"This study aimed to isolate and identify Macrophomina phaseolina fungus which was the causal aget of Charcol rot disease on mung bean (Vigna radita Wilczek L) from Elgadisia Governorate in order to isolate, diagnose, and evaluate efficacy of biological control fungal agents isolalated from the rhizosphere of the host plant. The biocontrol agents T. koningii, C. globosum and A. carbonarius were effective in inhibiting the pathogenic fungus under laboratory and greenhouse conditions. Two isolates of M. phaseolina fungal pathogen were identified in most samples of infected mung bean. Pathogenicity tests showed the ability of M. phaseolina to attack the seeds and cause seed rot. Isolates 1 and 2 of the fungal pathogen reduced the seed germination rate to 71.56 and 63.75%, respectively, compared with 86.66% for the control. The results obtained indicated the presence of a significant difference between the two isolates in inducing seedlings damping-off which reached 40% and 30%, respectively, compared with 0% for the control. The disease severity of isolate 1 reached 75.3% and that of isolate 2 reached 63.6%. The inhibitory effect of the fungal antagonists T. koningii and C. globosum varied. A. carbonarius demonstrated level 3 of inhibition to the pathogenic fungus M. phaseolina, whereas C. globosum and T. koningii demostrated inhibitory levels of 2 and 1, respectively. Results obtained also indicated that treatments with antagonistic fungi T. koningii, C. globosum and A. carbonarius increased the growth parameters of the mung bean plant. The antagonistic fungus C. globosum increased the plant height, root fresh and dry weight and chlorophyll content compared with the control. Furthermore, the results showed that treatment with T. koningii increased the mung bean seed germination rate to 100% and decreased disease severity of mung bean charcoal rot disease to 45.88% as compared to 89.86% severity for the contol. Likewise, the other antagonistic fungi A. carbonarius and C. globosum also increased the mung bean seed germination , and decreased mung bean charcoal rot disease severity. Keywords : Charcoal rot disease, mung bean, Macrophomina phaseolina, T. koningii, C. globosum, A. carbonarius.","PeriodicalId":37670,"journal":{"name":"Arab Journal of Plant Protection","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42649678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Overwintering and Alternative Hosts of Dust Mites Oligonychus afrasiaticus (McGregor) on Date Palm in Iraq","authors":"Hatem Motaab Hussein, S. J. A. Dahwi","doi":"10.22268/ajpp-39.3.173180","DOIUrl":"https://doi.org/10.22268/ajpp-39.3.173180","url":null,"abstract":"The dust mite Oligonychus afrasiaticus (McGregor) on date palm trees is one of the main pests affecting palm trees in Iraq. Its severity has increased its damage to the crop in recent years. A study of some environmental aspects of the pest such as alternative hosts, spread and distribution of the pest after harvesting and overwintering are important factors to identify pest's vulnerable periods, which can be utilized in the control process. The results revealed that the pest had activity during the spring on alternative hosts Sorghum bicolor, S. halepense, and Cynodon dactynlon. Surveying vegetables that are inter-planted with palm groves, the pest was found present in the field on the Fragaria ananassa, Cucurbita pepo, Solanum melongena, and Citrullus lanatus. At the \"rutab\" and \"tamar\" stages, higher numbers of O. afrasiaticus began to leave the dates fruit bunches to pinnae of frond trees and offshoot to feed and reproduce until the onset of winter and remain there as fertile females to resume their activities during the following spring. The highest density of mobile instars and eggs reached 0.9 individual/pinna and 1.4 egg/pinna, respectively, in October, and then the numbers began to decline to reach 0.3 individual/pinna during the winter period, when no eggs were observed. Furthermore, some plant species provided food and shelter for the pest during the winter period such as C. dactylon, S. halepense, Imperata cylindrica and Phragmites australis. Results obtained also showed that date palm seedlings grown randomly in the orchard under study acted as a refuge for the dust mite, as it fed and multiplied continuously on them for several generations and throughout the year. Keywords: Oligonychus afrasiaticus, overwintering, alternative hosts","PeriodicalId":37670,"journal":{"name":"Arab Journal of Plant Protection","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41318940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the Biological Control Agent’s Efficiency Against the Causal Agent of Early Blight of Solanum melongena","authors":"Abdulnabi Abbdul Ameer Matrood, A Rhouma, O. Okon","doi":"10.22268/ajpp-039.3.204209","DOIUrl":"https://doi.org/10.22268/ajpp-039.3.204209","url":null,"abstract":"Eggplant, an important vegetable crop in Iraq, faces yield losses due to early blight disease caused by Alternaria solani. Two antagonistic fungi (Aspergillus niger and Purpureocillium lilacinum) isolated from eggplant rhizosphere were tested in vitro (dual confrontation technique) and in vivo (preventive treatments) as potential bioagents against the most virulent A. solani isolates. A. niger and P. lilacinum at 30% conidia/ml exhibited high inhibitory rate (55.11%) against A. solani mycelial growth. Furthermore, these two antagonistic species when applied preventively at 30% of the stock conidial suspension in vivo, reduced significantly disease severity index (<28.41%). Moreover, A. niger (11.98 units/g of soluble protein) and P. lilacinum (8.11 units/g of soluble protein) enhanced the polyphenol oxidase activity. Based on the results obtained by this study, it appears that A. niger and P. lilacinum could be employed as foliar treatments against A. solani to promote eggplant growth and development and induce plant systemic resistance. To control A. solani, it is encouraged to use natural enemies as components in integrated disease management. Keywords: Alternaria solani, biological control, polyphenol oxidase, Solanum melongena, antagonistic fungi","PeriodicalId":37670,"journal":{"name":"Arab Journal of Plant Protection","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46524339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}