Disease severity was recorded 2 weeks after planting when seedlings were still at the primary leaf stage. In all of the rows planted with inoculated seeds, some of the plants were symptomless and others had leaf spots and puckering symptoms characteristic of bacterial brown spot. No difference in type or severity of symptoms was noted in any of the treatments. None of the treatments resulted in...

The genus Ramularia includes important plant pathogens with worldwide distribution, commonly associated with leaf spot diseases on a broad range of plant hosts. Although these fungi are common in Iran, most of the species found to date have been identified on the basis of morphological characteristics, and DNA data are available for limited number of them. During our investigation of fungi asso...

Aloe Vera (L.) Burn f. is a perennial succulent plant grown worldwide mainly for medicinal and cosmetic uses. During a routine survey a leaf spot disease of Aloe vera having infected plants with large necrotic, sunken, circular to oval, dark brown spots present on both surface of leaves was observed at SHIATS and neighboring areas. Microscopical examination revealed the presence of Alternaria a...

Application of exogenic bioactive natural plant compounds with protective, anti-mutagenic and anti-genotoxic effects against various chemical and physical agents is one of the modern approaches for reduction of the mutagenic burden of cells. Objective: The present study aims to provide data on the cytoxic and genotoxic effects of Papaver rhoeas L. water leaf extract and its anti-cytotoxic and a...

A digital image analysis method previously used to evaluate leaf color changes due to nutritional changes was modified to measure the severity of several foliar fungal diseases. Images captured with a flatbed scanner or digital camera were analyzed with a freely available software package, Scion Image, to measure changes in leaf color caused by fungal sporulation or tissue damage. High correlat...

Rice spotted leaf 6 (spl6) mutant produces lesions caused by spontaneous cell death in the absence of pathogenic infection. Expression of this genetic trait was developmentally programmed. After the tillering stage, small red and brown lesions were initiated in groups on the leaf blade. Eventually, the lesions formed parallel lines along the midrib of the leaf. Under light and transmission elec...

During disease surveys from 2019 to 2021, the authors frequently encountered leaf spot symptoms on Fischer’s ragwort plants growing at fields six locations of Gangwon Province, Korea. The displayed brown dark brown, circular or irregular spots plant leaves. revealed 1–90% diseased leaves plants. Phoma sp. was dominantly isolated lesions. Seven single-spore isolates fungus were selected and iden...