Category: Nematology Notes

Nematology Notes

Anatomy – Inner Body Tube
Anatomy – Oesophageal glands
Biology of Plant Parasitic Nematodes
Different methods of Nematode Control
Ecological classification of plant parasitic nematodes
History of Nematology in India
Identification of economically important plant nematodes
Integrated Nematode Management
Interaction of Nematodes with Micro-Organisms
Introduction to Nematology
Life Cycle of Nematode
Male Reproductive System
Morphology and Anatomy of Nematodes
Symptoms Caused by Nematodes
Taxonomy of Plant Parasitic Nematodes

Taxonomy of Plant Parasitic Nematodes

Taxonomy of Plant Parasitic Nematodes Nematodes are placed in the group invertebrata, Kingdon Animalia. Under separate phylum, Nemata / Nematoda, which consist of two classes, Secernentea and Adenophorea. Diagnostic characters of class Secernentea and Adenophorea The plant parasitic nematodes are included in the orders Tylenchida of class Secernentea and Dorylaimida of class Adenophorea. Order: Tylenchida […]

Morphology and Anatomy of Nematodes

Symptoms Caused by Nematodes Most of the plant parasitic nematodes affect the root portion of plants except Anguina spp., Aphelenchus spp., Aphelenchoides spp., Ditylenchus spp, Rhadinaphelenchus cocophilus and Bursaphelenchus xylophilus. Nematodes suck the sap of the plants with the help of stylet and causes leaf discolouration, stunted growth, reduced leaf size and fruits and lesions […]

Morphology and Anatomy of Nematodes

Morphology and Anatomy of Nematodes Even though nematodes occupy nearly every habitat on earth, they are remarkably similar in morphology and life stages. Despite their structural complexity, certain basic principles are common to all nematodes. Nematodes are triploblastic, bilaterally symmetrical, unsegmented, Pseudocoelomate, vermiform and colourless animals. The plant parasitic nematodes are slender elongate, spindle shaped […]

Male Reproductive System

Male Reproductive System The production of sperms takes place in testis. In nematodes, whenever the number of testis is one, it is known as monarchic conditions and when they are tow in number, the condition is known which moves forward and backward with help of specialized muscles attached with its head region. Spicule is narrower […]

Life Cycle of Nematode

Life Cycle of Nematode Root – knot nematodes (Meloidogyne spp.) The root – knot nematodes are sedentary endoparasites of underground plant parts. The eggs are retained in a gelantinous matrix, which normally protrudes out of the host tissues. About 200 to 300 oval eggs are found in a single egg mass which makes its size […]

Introduction to Nematology

Introduction to Nematology Nematology is an important branch of biological science, which deals with a complex, diverse group of round worms known as Nematodes that occur worldwide in essentially all environments. Nematodes are also known as eelworms in Europe, nemas in the United States and round worms by zoologists. Many species are important parasites of […]

Interaction of Nematodes with Micro-Organisms

Interaction of Nematodes with Micro-Organisms Plant parasitic nematodes favour the establishment of secondary pathogens viz., fungi, bacteria, virus etc. The nematodes alter the host in such a way that the host tissue becomes suitable for colonization by the secondary pathogens. Even though the nematodes themselves are capable of causing considerable damage to the crops, their […]

Identification of economically important plant nematodes

Identification of economically important plant nematodes Root knot nematode (Meloidogyne incognita, M. javanica, M.arenaria, M.halpa) Parasitism and habitat Females as well as third and fourth stage juvenile are sedentary endoparasites on many plants. Males and second stage juvenile are migratory and can be located in soil also. The rootknot nematodes are widely distributed in nurseries […]

Integrated Nematode Management

Integrated Nematode Management INM can be defined as a systems approach to reduce nematode to tolerable levels through a variety of techniques including predators and parasites, genetically resistant hosts, natural environmental modifications and when necessary and appropriate chemical nematicides. Integrated Nematode Management The grower combines several measures to prevent the growth of damaging nematode populations. […]