Which set lists the five categories of plant symptoms?

Which set lists the five categories of plant symptoms?

• A. Chlorosis, stunting, necrosis, mottling
• B. Necrosis, overdevelopment, underdevelopment, wilting, discoloration
• C. Lesions, blights, cankers, rots
• D. Galls, warts, brooming

Answer: (B)

Think about how plants reveal trouble in broad, recognizable patterns. The five categories described cover the main ways symptoms present: tissue that has died or is damaged (necrosis), growth that is unusually strong or conversely stunted (overdevelopment and underdevelopment), a loss of turgor or drooping due to water or vascular issues (wilting), and changes in color or appearance of tissue (discoloration). Necrosis shows where cells or tissues have died, often from toxins, disease, or physical injury. Overdevelopment and underdevelopment describe abnormal growth responses that can result from hormonal imbalances, nutrient stress, or pathogen effects, capturing both excessive and reduced growth. Wilting indicates problems with water uptake or transport, giving a telltale droop even if soil moisture isn’t the sole cause. Discoloration encompasses color changes that signal issues like nutrient deficiencies, disease, or environmental stress. This combination provides a broad, practical framework for categorizing plant symptoms you’ll encounter in the field, which is why it’s the best fit for listing the five general symptom categories.

Think about how plants reveal trouble in broad, recognizable patterns. The five categories described cover the main ways symptoms present: tissue that has died or is damaged (necrosis), growth that is unusually strong or conversely stunted (overdevelopment and underdevelopment), a loss of turgor or drooping due to water or vascular issues (wilting), and changes in color or appearance of tissue (discoloration). Necrosis shows where cells or tissues have died, often from toxins, disease, or physical injury. Overdevelopment and underdevelopment describe abnormal growth responses that can result from hormonal imbalances, nutrient stress, or pathogen effects, capturing both excessive and reduced growth. Wilting indicates problems with water uptake or transport, giving a telltale droop even if soil moisture isn’t the sole cause. Discoloration encompasses color changes that signal issues like nutrient deficiencies, disease, or environmental stress.

This combination provides a broad, practical framework for categorizing plant symptoms you’ll encounter in the field, which is why it’s the best fit for listing the five general symptom categories.