Related Experiment Video
Updated: Jan 29, 2026

High and Low Throughput Screens with Root-knot Nematodes Meloidogyne spp.
Published on: March 12, 2012
First Report of the Barley Root-Knot Nematode Meloidogyne naasi Infecting Annual Bluegrass on a Golf Course in
G Bélair1, L Simard1, J D Eisenback2
1Agriculture and Agri-Food Canada, St-Jean-sur-Richelieu, Quebec, J3B 3E6.
Abstract:
Annual bluegrass, Poa annua L., is an important component of the vegetation on golf course greens and fairways throughout Canada and is widely distributed across the world (2). The barley root-knot nematode, Meloidogyne naasi Franklin, infects and damages cereals such as barley (Hordeum vulgare), sorghum (Sorghum vulgare), and wheat (Triticum durum and T. vulgare), mainly in Europe. Of the root-knot species, M. naasi in particular, prefers grasses over other hosts, and infestations of this nematode can reduce the growth and vigor of turfgrasses (1). In July 2005, annual bluegrass at Beaconsfield Golf Club in Pointe Claire (45°26'N, 73°50'W), Quebec showed signs of an unidentified disease. Irregular yellowish/chlorotic patches were observed on the collar of one golf green. Lower turfgrass density in the turf areas with symptoms was noted. When roots were examined under a dissecting microscope, galling was observed. Upon dissection of washed galls, root-knot nematode egg masses and mature females inside the roots were observed. Nematode extractions of the soil from two samples of 50 g from the green and around the collar and perimeter were also done by the modified Baermann pan method. No juveniles were recovered from soil samples from the healthy area and an average of 400 and 1,500 juveniles/kg dry soil were counted in collar and perimeter samples of the patches. Morphological identification of mature females and juveniles were performed and confirmed to be M. naasi. Currently, there are no regulations to control the introduction of this nematode into Canada. To our knowledge, this is the first report of the occurrence of M. naasi in Canada where it is causing noticeable damage to turfgrass in Quebec. A soil survey is currently underway to examine the distribution of this nematode on golf course turfgrasses in Ontario and Quebec. References: (1) R. Cook and G. W. Yeates. Nematode pests of grassland and forage crops. Pages 305-350 in: Plant Parasitic Nematodes in Temperate Agriculture. K. Evans et al., eds. CAB International, Wallingford, UK, 1993. (2) S. I. Warwick. Can. J. Plant Sci. 59:1053, 1979.
More Related Videos
10:35In vivo and In vitro Infection of Potato Roots with Plant Parasitic Nematodes for the Assessment of Induced Structural Changes
Published on: February 28, 2025
08:42Author Spotlight: In Vitro Co-Culture System of Pine Shoots and Pinewood Nematode for Studying Host Volatile Response
Published on: September 27, 2024
Related Concept Videos
Primary and Secondary Growth in Roots and Shoots
Data Reporting and Recording
Types of Reports I: Hands-off Report
Following are the key components and categories of hand-off reports:
Purpose and Process:
Root Mean Square
For example, consider the velocity of gas molecules in a container. The gas molecules are moving in different directions, which might impart positive and negative...
Types of Reports II: Incident or Occurrence Report
Purposes:
In the healthcare industry, reports play a crucial role in documenting incidents within an agency. The primary objective of these reports is to ensure patient safety, uphold the...
Types of Reports III: Telephone and Verbal Reports
Here's an overview of each type:
Telephone Orders