Phylloxera cannot survive in which soil type?

• A. Heavy clay soils
• B. Sandy soils
• C. Rocky soils
• D. Rich loam

Answer: (B)

Phylloxera needs a moist, well-developed root environment to feed and complete its life cycle. Sandy soils drain rapidly and don’t retain enough moisture, so roots dry out more quickly and the pest struggles to feed and reproduce. In contrast, heavier soils like clay or rich loam hold water longer and support denser root systems, creating a more hospitable habitat for phylloxera. Rocky soils can limit rooting, but the defining factor here is the lack of moisture stability in sandy soils. So, sandy soils are the type where phylloxera cannot survive.