Introductory Nematology

PATH 172 is an introductory nematology course that covers plant-parasitic nematodes, their morphology, reproduction, symptoms, identification, and management strategies.

Plant-parasitic nematodes are microscopic roundworms that feed on plant tissues, especially roots, and can reduce growth, nutrient uptake, and crop yield.

Root-knot nematodes are important because they are among the most damaging plant-parasitic nematodes, causing root galls, poor nutrient and water uptake, stunting, and yield loss in many crops.

Common symptoms include stunted growth, yellowing, poor vigour, patchy field appearance, wilting, reduced root function, and in some cases visible root galls or deformities.

It is difficult because aboveground symptoms often resemble nutrient deficiency, water stress, or root disease, so proper diagnosis usually needs root observation and soil or root sampling.

Nematodes are managed through approaches such as crop rotation, sanitation, resistant varieties, organic or biological measures, careful chemical use where justified, and integrated nematode management.

They learn these because nematodes are microscopic and often hidden in soil or roots, so correct sampling and extraction are essential for identification and management decisions.

Integrated nematode management means combining cultural, biological, host-resistance, and other appropriate control methods to reduce nematode damage economically and sustainably.