Written in English
|Statement||by William Dow Ostrofsky.|
|The Physical Object|
|Pagination||, 76 leaves, bound :|
|Number of Pages||76|
P. lateralis could not be detected in most naturally and artificially infested soils using baits of Chamaecyparis lawsoniana tissue floated over soil. Detection was much improved when baits were floated over particles of organic matter (OM) separated from soil by wet-sieving. P. lateralis was detected 3 and 15 times more frequently, respectively, from slurries of 2 soils with the OM present Cited by: Blending the organic substrate\ud had no apparent effect on detection.\ud When an organic matter fraction of an infested soil was\ud collected and stored at temperatures of 5, 10, 15, or 20 C for a\ud period of five months, no apparent loss of infectivity occurred, indicating\ud a high survival . Ostrofsky WD; Pratt RG; Roth LF, Detection of Phytophthora lateralis in soil organic matter and factors that affect its survival. Phytopathology, 67(1) Pscheidt JW; Ocamb CM, Cedar Port-Orford (Chamaecyparis lawsoniana)-Root Rot. Pacific Northwest Plant Disease Management Handbook., USA: Pacific Northwest Handbooks. Detection of Phytophthora lateralis in Soil Organic Matter and Factors That Affect its Survival W. D. Ostrofsky, R. G. Pratt, and L F. Roth Research Assistant, Research Associate, and Professor, Department of Botany and Plant Pathology, Oregon State University, Corvallis
Phytophthora lateralis (P. lateralis) is an aggressive water mould, a fungus-like pathogen which mostly affects Lawson cypress trees (Chamaecyparis lawsoniana), and some other species. Few infected Lawson cypress trees recover. Distribution. P. lateralis is known to be present in all four countries of the UK, and it is more prevalent in. Phytophthora lateralis (P. Lateralis) infects tree roots which come into contact with spores in the soil or water, and it kills most Lawson cypress trees it infects. Public forests affected P. lateralis is present in a number of locations, including. Phytophthora is a genus of fungus-like soil and water-borne organisms that cause some of the worst plant health issues across the world. The potato famine in 19th Century Ireland was caused by a species of Phytophthora. P. lateralis infects and damages the roots of trees so it can no longer take up water and nutrients, killing the tree. In summer , soil samples were collected from all areas except Douglas Island; in summer , 77 soil samples were collected near Peril Strait and 25 near Slocum Arm. Each sample was taken within 0'5 m of a declining or healthy Alaska-cedar. The organic fraction of each sample was separated by wet-sieving (Ostrofsky et al., ).
Survival of Phytophthora lateralis in an organic matter fraction of the soil. Thesis, (). Susceptibility of Pacific Yew (Taxus brevifolia Nutt.)to Phytophthora lateralis. Thesis, (). Susceptibility of Pacific yew to Phytophthora lateralis. Phytophthora root rot is a soil based disease that can kill a wide range of plants. In areas with compacted soil, digging over the area and incorporating organic matter will help to open up the soil. Avoid further compaction by working in dry weather. Replant the area. Phytophthora species are well adapted to diverse plant hosts and environments, and they produce several types of structures that are specialized for survival, dispersal, or infection. Oospores are sexual reproductive spores that result from fertilization of the oogonium (female organ) by . The geographic origins of the invasive Phytophthora species, P. lateralis and P. ramorum are unknown. In soil samples were collected in an old growth yellow cedar (Chamaecyparis obtusa var. formosana) stand in the Ma‐kau Ecological Park in north eastern Taiwan and subjected to Phytophthora baiting procedures at 18° needle baits yielded isolates of a slow growing Phytophthora.