15 Nov Integrated Nematode Disease Management
एकीकृत सुत्रकृमी (निमेटोड) रोग प्रबंधन Nematodes are parasites belonging to animal kingdom that are of concerned in the agricultural crop health. They belong to phylum Nemata, previously named Nemathelminthes or Aschelmnthes, several hundreds of nematode species are known to feed on plants as parasites and cause a variety of diseases. Most of the damage by nematodes is caused by secretion injected into plants while they feed. This secretion, called saliva, is produced in three glands, from where it flows into oesophagus and is injected through stylet. The males of species generally may not penetrate roots, but females invariably get established on roots and are responsible for destruction of the host. Nematode saliva liquefies contents of the cells of the host, making them easier to inject and assimilate. As the result of action of saliva, the host responses are expressed in disease symptoms such as hyrertrophy, hyperplasia, suppression of mitosis, cell necrosis and growth stimulation. Plant pathogenic nematodes are permanent soil dwellers. They live freely in the soil and feed superficially on roots and underground steams. The integrated management of nematode diseases can be achieved by use of chemicals, cultural practices, biological control and host resistance. Components of Integrated Management of Nematode Diseases Chemicals: There are numbers of chemicals having nematocidal properties which are categorized into...