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أسئلة شائعة

  Lectures of PLPT 527 Course
 "Phytopathgenic Nematodes"

Weeks 1-2

Topic 1


Chemical Composition of Nematodes (The cuticle, The egg, Inorganic substances, General organic substances: carbohydrates, amino acids and proteins, lipids, …. etc.). Relation of structures to parasitism. Role of host in life cycles (Hatching and emergence, Molting, Attraction, Sex determination).







Weeks 3-4

Topic 2


Feeding Habits and Digestion (Terminology: Alimentary canal, Feeding, Enzymes). Review of feeding habits (Predators, Saprophagous and microbiovorus, Animal parasites).







Week 5



First Exam.






Week 6-8

Topic 3


Nematode Behavior and Response to Stimuli:

I- Stimulation of hatching (Range of activity, Effect of dilution, Effects of chemical additives and pH on hatching, Function of hatching factors, Effects of physical factors on hatching).

II. Inhibitory factors in hatching.

III- Relation of hosts to molting.

IV- Attraction of nematodes (Host effects, Attraction of CO2 and O2). Misc. physical factors, pH and misc. chemicals).

V- Sexual attractants.






Weeks 9-11

Topic 4


Nematodes as pathogens:

I- Plant nematodes and pathogenicity.

II- Concepts in determination of pathogenicity (Koch's postulates as originally developed, Basic phases of establishing pathogenicity).

III- Plant-nematode relationships (As developed by Mountain, As developed by Hollis).

IV- Procedure used in investigation the role of nematodes in the etiology of plant disease (General approaches, Specific types of experiments).






Weeks 11-13

Topic 5


Mechanisms of Pathogenesis and Host Responses to Infection, Including Altered Host Nutrition:

I- Introduction.

II- Gall formation.

Cultivation of Nematodes:

I- Introduction.

II- Terminology.

III- Methods for cultivating of plant-parasitic nematodes.






Week 14



Final exams


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