A disorder of sugarcane (Saccharum species hybrid) characterised by yellowing of the leaf midrib and lamina was first reported in East Africa in the 1960s. This disorder was termed yellow wilt (Ricaud, 1968). A similar disorder was reported as autumn decline in Brazil (Hughes, 1964). Some thirty years later similar symptoms were observed on sugarcane in Hawaii (Schenk et al., 1990) and Brazil (...

Unstabilised bisphenol A polycarbonate samples were aged under UV radiation for periods of up to 3000 hours. The samples were then characterised using FTIR/ATR, GPC, SEM, microscopy, light transmission and colour changes. The changes in optical properties were related back to the changes in the polymer microstructure and composition. In this study, the molecular weight of polycarbonate was seen...

A highly sensitive one-step multiplex RT-PCR (OMRT-PCR) system with an internal plant gene control was developed to simultaneously detect single and mixed RNA DNA viral pathogens affecting watermelon squash in the Southeastern United States. Current methods rely on a singleplex detection for several viruses which is time-consuming large-scale field monitoring. The gene-specific primers one viru...

Potato yellow vein virus (PYVV) was detected in potatoes grown the Central highlands, north of Bogotá (~3000 m altitude), Colombia. At this altitude viral whitefly vectors are largely absent, but infection persists because use uncertified tubers. Plants with typical PYVV-induced yellowing symptoms, as well atypical or non-symptomatic symptoms were sampled at three separate geographical location...

We determined the complete sequence and organization of the genome of a putative member of the genus Polerovirus tentatively named Pepper yellow leaf curl virus (PYLCV). PYLCV has a wider host range than Tobacco vein-distorting virus (TVDV) and has a close serological relationship with Cucurbit aphid-borne yellows virus (CABYV) (both poleroviruses). The extracted viral RNA was subjected to SOLi...