How to Identify and Classify Plums
  • 1. What is the primary fruit type of all plums?
A) Pome
B) Aggregate Fruit
C) Drupe
D) Berry
  • 2. Which characteristic is MOST important for initial plum identification?
A) Branch thickness
B) Skin color
C) Pit size
D) Leaf shape
  • 3. Japanese plums are scientifically classified under which species?
A) Prunus americana
B) Prunus cerasifera
C) Prunus salicina
D) Prunus domestica
  • 4. European plums are scientifically classified under which species?
A) Prunus salicina
B) Prunus domestica
C) Prunus cerasifera
D) Prunus americana
  • 5. Which plum species is known for its small size and often used for jams?
A) Prunus persica
B) Prunus domestica
C) Prunus americana
D) Prunus salicina
  • 6. What is a distinguishing characteristic of 'greengage' plums?
A) Freestone pit
B) Green skin when ripe
C) Very large size
D) Red flesh
  • 7. Which plum type is typically used for drying into prunes?
A) American
B) Cherry
C) European
D) Japanese
  • 8. A plum with a pointed end is most likely a...
A) Damson plum
B) European plum
C) Greengage plum
D) Japanese plum
  • 9. What pit type is most common in Japanese plums?
A) Freestone
B) Clingstone
C) Semi-freestone
D) No pit
  • 10. What pit type is most common in European plums?
A) Clingstone
B) Semi-freestone
C) No pit
D) Freestone
  • 11. A 'bloom' on a plum refers to what?
A) Fungal growth
B) Waxy coating on skin
C) Sugar crystals
D) Insect infestation
  • 12. Which plum species is also known as the 'cherry plum'?
A) Prunus domestica
B) Prunus cerasifera
C) Prunus salicina
D) Prunus americana
  • 13. The flavor profile of most European plums is generally...
A) More tart and acidic
B) Similar to cherries
C) Sweeter and less tart
D) Bland
  • 14. The flavor profile of most Japanese plums is generally...
A) Bland
B) Similar to apples
C) Mild and sweet
D) Tart and complex
  • 15. What leaf characteristic helps identify plum trees?
A) Needle-like leaves
B) Smooth leaf edges
C) Serrations along the leaf edge
D) Compound leaves
  • 16. Which ripening time best describes European plums?
A) Late summer to fall
B) Early spring
C) Winter
D) Mid-summer
  • 17. Which ripening time best describes Japanese plums?
A) Early to mid-summer
B) Late fall
C) Winter
D) Late summer to fall
  • 18. What color is the flesh of 'Santa Rosa' plums?
A) Green
B) Yellow
C) Amber to red
D) Purple
  • 19. Which factor affects plum size most significantly?
A) Cultivar
B) Tree age
C) Rainfall amount
D) Soil type
  • 20. How does chilling requirement affect plum cultivar selection?
A) Determines the skin color
B) Determines the sweetness of the fruit
C) Determines suitability for the climate
D) Determines the size of the fruit
  • 21. The shape of European plums is generally...
A) Oval
B) Heart-shaped
C) Round
D) Pear-shaped
  • 22. What does 'self-fertile' mean in the context of plum trees?
A) Needs no water
B) Requires a separate pollinator
C) Can pollinate itself
D) Grows in very poor soil
  • 23. A small, tart plum with dark blue skin is likely a...
A) Damson
B) Greengage
C) Santa Rosa
D) Elephant Heart
  • 24. Which tool is best for determining the sugar content of a plum?
A) Soil pH meter
B) Microscope
C) Tape measure
D) Refractometer
  • 25. What does 'precocity' refer to in plum trees?
A) Rapid growth rate
B) Tolerance to drought
C) Bearing fruit early in life
D) Resistance to disease
  • 26. Compared to Japanese plums, European plum trees generally...
A) Require less pruning
B) Bear fruit faster
C) Are more cold hardy
D) Have a longer lifespan
  • 27. What is the most common use of myrobalan plums?
A) Rootstock for grafting
B) Drying
C) Fresh eating
D) Jam making
  • 28. A large plum with a dark purple skin and red flesh is likely a...
A) Santa Rosa plum
B) Damson plum
C) Elephant Heart plum
D) Stanley plum
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