Alternaria brown spot disease is caused by the alternata tangerine pathotype, which relies on ACT-toxin for infection. At present, all identified biosynthesis-related genes are multi-copy genes. In this study, we summarized advances in important host-specific toxins (HSTs), and listed key required pathogenicity of A. pathotype. Toxin virulence test results revealed that different citrus species...

In order to improve the problems of poor accuracy and low efficiency in tobacco leaves disease recognition diagnosis avoid misjudgment recognition, a spot segmentation method based on improved ORB algorithm was proposed. The FAST14-24 used preliminarily extract corners. It overcame deficiency sensitivity traditional corner detection image edges. During experiment, 28 parameters were obtained th...

The Curvularia leaf spot is the most important and destructive disease of cotton. research was conducted to prove lunata as an Incitant Infected leaves with typical symptoms were subjected isolation purification. As a result, brown brownish-black fungal colonies found. morphological study carried out by using microscope, spores fungus found slightly curved or straight; mycelium septate black in...

BACKGROUND Turfgrass species are agriculturally and economically important perennial crops. Turfgrass species are highly susceptible to a wide range of fungal pathogens. Dollar spot and brown patch, two important diseases caused by fungal pathogens Sclerotinia homoecarpa and Rhizoctonia solani, respectively, are among the most severe turfgrass diseases. Currently, turf fungal disease control ma...

Burkholderia andropogonis was first described as the causal agent of stripe disease of sorghum and leaf spot of velvet bean in 1911 (20); at that time, it was classified as Pseudomonas andropogonis. Pseudomonas woodsii was also described, in the same publication, as an important pathogen of carnation. These two pathogens were reclassified to the genus Burkholderia based on DNA-rRNA hybridizatio...

Background: Rice brown leaf spot is a major fungal disease caused by Bipolaris oryzae. Biological management of can be achieved bacteria associated with phyllosphere region rice crop. Methods: Antagonistic were isolated from phylloplane the crop using dilution method. Phylloplane morphologically and biochemically characterized. activity was tested against oryzae Dual culture technique. Result: ...

resistance of 16 sugar beet cultivars to cercospora leaf spot was evaluated in ghaemshahr region. the experiment was conducted in a complete block design with six replications and disease severity of cultivars was measured two times. as a winter crop the root yield of cultivars and their disease severity compared under natural cercospora infection in dezfoul area in a complete block design with...

A new spot test has been developed for the detection of dithiocarbamate fungicides such as mancozeb, propineb and zineb at nkg level in soil and water. The colour formation is based on the decomposition of dithiocarbamate to carbon disulphide which reacts with plumbite i ' alkaline medium to form a brown complex that finally converts to black lead sulphide. The coloured product exists as a brig...