Effectiveness of mating disruption with TUTATEC® dispensers against Tuta absoluta (Lepidoptera: Gelechiidae) in heated greenhouses in southern Tunisia     

Chouikhi  Sabrine  Assadi  Besma Hamrouni  Abbes  Khaled  Bkhiti  Imen  Grissa Lebdi  Kaouthar  Belkadhi  Mohamed Sadok 《Phytoparasitica》2023,51(2):273-283

Phytoparasitica - Tomato production in geothermal greenhouses in Tunisia showed remarkable growth during the last decade and has been considered an important economic sector within the Tunisian...  相似文献   

Streptomyces sp., a cause of fistulous withers in donkeys     

Elzein S  Hamid ME  Quintana E  Mahjoub A  Goodfellow M 《DTW. Deutsche tier?rztliche Wochenschrift》2002,109(10):442-443

Four of 10 donkeys, which showed lesions simulating fistulous withers, were examined clinically with the aim to cultivate and identify the causal agent. Aspiated purulent materials were subjected to bacteriological examination. The causal organisms were recovered in Tryptic Soya agar medium when incubated aerobically at 37 degrees C for up to 5 days. These organisms were found to be actinomycetes-like, Gam positive with stable branching filaments and to form heavy aerial hyphae on colony surface. The isolated organisms ere tentatively identified as Streptomyces sp. on the basis of morphological and cultural characteristics. The initial sequences analysis of the 16S rDNA gene conformed that one of the isolates (SD551) falls within the phylogenetic clade, which encompasses the genus Streptomyces. Studies are underway to further describe the disease and its causal agent. The report represents a good evidence to incriminate Streptomyces in the aetiology of the fistulous withers.  相似文献   

Premières observations de Verticillium dahliae sur olivier en Tunisie     

M. A. Triki  A. Hassaïri  M. Mahjoub 《EPPO Bulletin》2006,36(1):69-71

Au cours des prospections effectuées dans les oliveraies de la délégation de Mahres (région de Sfax) située au centre-est de la Tunisie, 12 cas de dépérissement d'oliviers âgés, du cv. 'Chemlali' ont été observés dans deux parcelles voisines. Dans ces deux vergers, les oliviers malades sont répartis en foyers. Les investigations au champ et au laboratoire ont permis de mettre en évidence la présence du champignon Verticillium dahliae , qui est ainsi signalé pour la première fois en Tunisie sur olivier.  相似文献   

Phenotypic responses of the wild wheat relative Aegilops geniculata Roth and wheat (Triticum durum Desf.) to experimentally imposed salt stress     

Khaled Mguis  Nadia Ben Brahim  Ali Albouchi  Mbarka Yakkoubi-Tej  Asma Mahjoub  Zeineb Ouerghi 《Genetic Resources and Crop Evolution》2008,55(5):665-674

In order to study the salt effect on the wild wheat and durum wheat, three accessions of Aegilops geniculata L. from Ain zana, Zaghouan, and Sbitla and one variety of wheat (Triticum durum L.) have been grown in the INRAT green house and treated with different salt concentrations. The morphological, phenological and yield characters have been measured for each plant and analyzed using SAS software. This study has shown a high degree of variation of these characters mainly related to geographical origin. It was observed also that Sbitla accession was less affected by the imposed salt stress than all the others while Ain zana was the most affected one.  相似文献   

Codend selectivity for jack mackerel and whitefin jack and unequal split parameter estimates observed in trouser trawl experiments     

Mohamed Salah Mahjoub  Seiichi Takeda  Toshifumi Hayashi  Daisuke Shiode  Takafumi Arimoto  Tadashi Tokai 《Fisheries Science》2011,77(2):169-181

Codend selectivity for the jack mackerel Trachurus japonicus and the whitefin jack Kaiwarinus equula were evaluated based on data from trouser trawl experiments carried out in the East China Sea, using a test codend of 60 mm diamond mesh and a control codend made of minnow net with a square mesh of 9 mm bar length. Between-haul variations in parameters and the mean selection curves were tested with the catch data in the SELECT approach, and then the model of between-haul variation in the split parameter with the mean selection curve was chosen as the best fit using Akaike’s information criterion model selection. The 50% retention lengths and the selection ranges were 11.4 and 3.36 cm for jack mackerel and 8.83 and 0.93 cm for whitefin jack, respectively. The selection curve for whitefin jack was sharp, whereas that for jack mackerel was relatively wide. As the estimated split parameters indicated, about 80% of the whitefin jack entered the control codend, but 85 and 90% of the jack mackerel entered the control codend in the second and third hauls, respectively. The inequality in the split parameter is discussed from the viewpoint of the animal’s swimming behavior and water movement based on underwater video observations.  相似文献   

First report of Citrus viroid V in North Africa     

Imen Hamdi  Amine Elleuch  Nabiha Bessaies  C. Douglas Grubb  Hatem Fakhfakh 《Journal of General Plant Pathology》2015,81(1):87-91

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Effects of Bacillus subtilis on the water quality,stress tolerance,digestive enzymes,growth performance,immune gene expression,and disease resistance of white shrimp (Litopenaeus vannamei) during the early hatchery period     

Mirbakhsh  Maryam  Mahjoub  Masoud  Afsharnasab  Mohammad  Kakoolaki  Shapoor  Sayyadi  Mostafa  Hosseinzadeh  Saeid 《Aquaculture International》2021,29(6):2489-2506

Aquaculture International - In the present study, the white shrimp, Litopenaeus vannamei, was supplemented with the probiotic Bacillus subtilis IS02 in order to improve the larval survival rate....  相似文献   

First report of verticillium wilt of artichoke caused by Verticillium dahliae in Tunisia     

H. Jabnoun-Khiareddine  M. Daami-Remadi  F. Ayed  M. El Mahjoub 《Plant pathology》2008,57(2):377-377

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Verte and Romaine lettuce varieties (Lactuca sativa) show differential responses to high NaCl concentrations     

Olfa Baâtour  Jun Huang  Nawel Nasri  Imen Ben Salah  Imen Tarchoun  Maha Zaghdoudi  Margaret Y. Gruber  Mokhtar Lachaâl  Zeineb Ouerghi  Abdelali Hannoufa 《植物养料与土壤学杂志》2012,175(4):641-648

In this study, we report on the relationship between individual antioxidant carotenoids, phenolic fractions, and flavonoids and attenuating NaCl toxicity in two contrasting varieties of lettuce (Lactuca sativa L., var. Verte and Romaine), as a means of developing more precise targets for lettuce breeding. In seedling leaves, carotenoid levels increased under NaCl stress in Verte, but remained unchanged in Romaine. Chlorogenic acid (CGA), a soluble polyphenol abundantly present in leaves, was the only phenolic acid that accumulated significantly in both varieties and was predominant under salinity. Remarkably, CGA was more prominent in Verte than Romaine at moderate salinity levels (100 mM). Foliar flavonoid levels were also differentially increased in both seedling types grown under 100 mM NaCl, but dropped significantly in both varieties under 200 mM NaCl. Germination, which was overall more salt‐resistant in Romaine, was significantly increased under salt stress by application of low dosage (10^–6 to10^–5 M) of CGA to Verte, but not to Romaine. These results suggest that CGA is involved in modulating NaCl‐induced oxidative‐stress responses during seed germination in Verte.  相似文献   

Leak syndrome of potato in Tunisia caused byPythium aphanidermatum andPythium ultimum     

M. A. Triki  Sylvie Priou  M. El Mahjoub  A. Baudry 《Potato Research》2001,44(3):221-231

Summary TwoPythium spp. were isolated from diseased tubers exhibiting rots at harvest, in summer stores and also in refrigerated storage. Symptoms shared features described for both pink rot caused byPhytophthora erythroseptica and leak caused byPythium spp. The causal agents were identified asPythium aphanidermatum andP. ultimum by morphological and physiological observations and by fingerprinting using oomycete specific primers to amplify the internal transcribed spacer (ITS1) within ribosomal DNAs. The optimum temperatures for infection were 30°C forP. aphanidermatum and 25°C forP. ultimum, corresponding to the optimum temperatures for growth in vitro. The optimum concentration for infection of tubers inoculated by dipping in a suspension of oospores or hyphal swellings after wounding was found to be 10³ reproductive organs/ml, whereas the infection threshold was 10 reproductive organs/ml.  相似文献