First Report of Alternaria dauci Causing Leaf Blight of Coriander (Coriandrum sativum) in Algeria

International audienceCoriander (Coriandrum sativum, family Apiaceae) is an important condiment plant in Algeria

Role of mannitol in pathogenic determinism in Alternaria brassicicola

International audienc

Alternaria species associated with early blight epidemics on tomato and other Solanaceae crops in northwestern Algeria

Early blight is a common disease of Solanaceae crops worldwide. The occurrence of Alternaria spp. was studied during three epidemics on tomato in northwestern Algeria. Alternaria was detected in more than 80 % of the diseased plant samples and accounted for more than 50 % of the total fungal isolates recovered from these samples. Morphological and molecular investigations revealed that small-spored isolates producing beaked conidia, i.e. belonging to the section alternaria, were prominent in most of the surveyed locations representing more than 80 % of the total Alternaria isolates in three locations (Mascara, Ain Témouchent and Sidi Belabbèsse). Based on their sporulation patterns they were recognized as A. alternata and A. tenuissima. Small-spored isolates producing conidia without beak and assigned to A. consortialis were also found at a low frequency (< 1 %). Large-spored isolates producing conidia ended by typical long beaks and identified as A. linariae (syn. A. tomatophila), A. solani and A. grandis were also recovered from all the sampled areas and represented 33.8 %, 6.3 % and 1.3 % of the total Alternaria isolates, respectively. Pathogenicity tests on tomato with a selection of 85 strains representative of the isolates collection revealed that all the tested isolates were able to produce extending lesions on inoculated leaves albeit with variable intensity. Large-spored species included the most aggressive isolates. Small-spored Alternaria, although less aggressive than large-spored Alternaria, had the ability to provoke brown necrotic spots and circumstantially developed synergistic interactions in mixed infections with moderately aggressive isolates of A. linariae

An Analysis of Federal Aviation Administration Enforcement Actions Against sUAS Operators

The Federal Aviation Administration (FAA) has promulgated regulations to govern the commercial operation of small uncrewed aircraft systems (sUAS). Compliance with these regulations is essential for maintaining safety in the National Airspace System. And if sUAS operators fail to comply with applicable federal aviation regulations, the FAA has been granted the authority to enforce these regulations. This study explores how the FAA has been exercising its enforcement power in the context of sUAS operator regulatory noncompliance. Using data obtained from a Freedom of Information Act request, this study examines 62 FAA enforcement actions levied against sUAS operators from 2012 until 2020. Key findings include trends in enforcement activity following the promulgation of Part 107 regulations; timelines associated with civil penalty and certificate action cases; and the specific regulations most frequently prosecuted by the FAA in sUAS enforcement cases

Pharmacokinetics of secnidazole after single oral dose in healthy volunteers

National audienc