Tolerance

Definition

Tolerance refers to the degree to which a crop or variety can withstand damage caused by nematodes without significant impact on growth or yield. It indicates sensitivity rather than immunity.

Importance

Understanding tolerance is crucial for:

• Crop selection: Choosing varieties that can cope with nematode presence.
• Yield protection: Minimising losses in infested fields.
• Integrated pest management: Combining tolerant varieties with other control measures.

Tolerance vs Resistance

Tolerance should not be confused with resistance:

• Tolerant variety: Experiences little damage despite nematode presence.
• Sensitive variety: Suffers significant damage under the same conditions.
• Resistant variety: Actively prevents nematode reproduction or survival.

Key Considerations

• Tolerance does not eliminate nematodes; it only reduces crop damage.
• Resistant varieties help control nematode populations, while tolerant varieties maintain yield.
• Both traits can be combined for effective nematode management.