The Asian citrus psyllid (ACP, Diaphorina citri, Hemiptera: Liviidae), is the principal vector of the phloem-limited bacteria strongly associated with huanglongbing (HLB), the world's most serious disease of citrus. Host plant resistance may provide an environmentally safe and sustainable method of controlling ACP and/or HLB. Two xCitroncirus accessions (hybrids of Poncirus trifoliata and Citru...

The productivity and the geographical distribution of most commercially important Citrus varieties are markedly affected by environmental low temperatures. As gene engineering has been shown to be a favourable alternative to produce germplasm with improved cold tolerance, a broad group of cold regulated genes have been previously identified from several Citrus spp. By contrast, little informati...

Species of Colletotrichum are considered important plant pathogens, saprobes, and endophytes on a wide range of plant hosts. Several species are well-known on citrus, either as agents of pre- or post-harvest infections, such as anthracnose, postbloom fruit drop, tear stain and stem-end rot on fruit, or as wither-tip of twigs. In this study we explored the occurrence, diversity and pathogenicity...

in order to identify flora and distribution mapping of weeds in citrus orchards of bandar-e-gaz township, 101 orchards were selected during 2014, and the summer weed species were sampled and detected using a w method. with using specific formula of density, frequency, uniformity, abundance of each weed species was calculated. also, geographic coordinates of orchards (latitude, altitude and elev...

When it comes to keeping the world green, roots have historically been considered to be mere purveyors of water and nutrients to the shoots. However, this view has changed dramatically over the past 25 years as evidence has accumulated that roots can be the ‘movers and shakers’ in orchestrating aboveground interactions between plants and their panoply of parasites (Bezemer and van Dam, 2005; Er...

sugar beet roots and attached soil are usually transferred to sugar factories for processing ,then the roots are washed by pressurized water. muddy water as waste flows in canal and is used to irrigate fields. the possibility of occurrence and fluctuations of the pathogenic organisms in waste were studied in 2005. the samples were collected from waste water once a week. isolation of pathogens w...

The glassy-winged sharpshooter (GWSS) is an important vector of Xylella fastidiosa (Xf), the bacterial pathogen that causes several economically important plant diseases, including citrus variegated chlorosis (CVC), oleander leaf scorch (OLS) and Pierce’s disease (PD) of grapevines. In recent years there has been an increasing interest in the potential use of biological control agents to halt t...