Which pest type causes major damage on a regular basis?

• A. Key pests
• B. Secondary pests
• C. Occasional pests
• D. Major pests

Answer: (A)

Key pests are the ones that routinely cause economic losses and therefore must be actively monitored and controlled. Their damage happens year after year, so you use action thresholds and timely interventions to prevent steady losses. Occasional pests only cause damage sporadically, and secondary pests tend to become problems mainly when the ecosystem changes in a way that reduces natural checks or when other pests are managed. While some frameworks use “major pests,” this set distinguishes the pests that demand ongoing attention by labeling them as key pests. That regular, substantial impact is why this option is the best choice.