The current study was carried out to evaluate the effect of some growth retardants such as alar, ethrel, cycocel and paclobutrazol with different concentrations (50, 100, 150 and 200 ppm.) on maize dwarf mosaic virus (MDMV) in vitro and in vivo. In vitro experiment, growth retardants reduced the occurrence of mosaic symptoms on maize plants. These percentages were reduced to 40%. Paclobutrazol ...

Apples are the third most produced fruit in world, behind bananas and oranges, terms of volume. Over past ten years, Serbia's apple production has nearly doubled. less subjected to viral viroid attacks than other species. Most viruses cause no visible symptoms on plant's organs, trees either seem be good condition or, case sensitive cultivars, their yield is reduced. Apple stem pitting virus (A...

White clover (Trifolium repens L.) is an important perennial legume forage and ornamental plant, widely distributed cultivated in the world. Recently, white plants showing symptoms of leaf mosaic redding were observed Hohhot, Inner Mongolia China. In this work, flexuous filamentous viral particles about 700 × 13 nm size symptomatic samples. The infection yellow vein virus (ClYVV) was confirmed ...

Despite the generalized use of cultivars carrying the rym4 resistance gene, the impact of viral mosaic diseases on winter barleys increased in recent years in France. This change could reflect i) an increased prevalence of the rym4 resistance-breaking pathotype of Barley yellow mosaic virus Y (BaYMV-2), ii) the emergence of rym4 resistance-breaking pathotypes of Barley mild mosaic virus (BaMMV)...

Papaya leaf distortion mosaic virus is highly destructive to commercial papaya production. Here, the complete genome sequence was determined for an isolate of papaya leaf distortion mosaic virus, designated PLDMV-DF, infecting the commercialized papaya ringspot virus (PRSV)-resistant transgenic papaya from China. Excluding the 3'-poly (A) tail, the sequence shares high sequence identity to seve...

A novel potyvirus was discovered in pecan (Carya illinoensis) showing leaf mosaic symptom through the use of deep sequencing of small RNAs. The complete genome of this virus was determined to comprise of 9,310 nucleotides (nt), and shared 24.0% to 58.9% nucleotide similarities with that of other Potyviridae viruses. The genome was deduced to encode a single open reading frame (polyprotein) on t...

This study reports the findings of a distinct Potato virus Y (PVY) isolate found in Northeast China. One hundred and ten samples (leaves and tubers) were collected from potato plants showing mosaic symptoms around the city of Harbin in Heilongjiang province of China. The collected tubers were planted and let to grow in a greenhouse. New potato plants generated from these tubers showed similar s...

alfalfa crops were surveyed for the incidence of alfalfa mosaic virus (amv), cucumber mosaic virus (cmv), peanut stunt virus (psv), bean leaf roll virus (blrv), bean yellow mosaic virus (bymv) and bean common mosaic virus (bcmv) in the major growing areas in the southeast and central regions of iran. samples were collected between may 2009 and march 2011 and analyzed for viral infection initial...

a plant viral vector engineered from an in vivo infectious clone of zucchini yellow mosaic virus(zymv) was used to express the human interferon-gamma (inf-γ) in planta. the inf-γ gene was in frame inserted between the p1 and hc-pro orfs of the zymv vector. the infectious activity of the vector was approved by rubbing the plasmid on chenopodium quino a and observing local lesions. individual les...

Methods currently used in South Africa for determining the reactions of new sugarcane clones to smut, mosaic, leaf scald and streak during the process d selection are described and results from recent trials are presented. Resistance screening procedures have been expanded and improved in recent years. The main changes have been the regional location of trials involving the different diseases, ...