Horticulture II, Unit 3

The main function of a greenhouse is to:

• To beautify where it is located

• To produce corn, soybeans, wheat

• To provide a environment to grow plants

• to supply carbon dioxide to plants

When bedding plants have lower leaves that are brown, dry, and rotting, the problem is:

• Diseases

• Germination

• Insects

• Spindly Growth

The expanded volcanic rock that Corky noticed in his potting soil is most likely:

• Vermiculite

• Perlite

• Bark

• Peat Moss

What action is Marie performing when she removes the spent or dead flower from her zinnia?

• Deadheading

• Sowing

• Planting

• Harvesting

The green, soft-bodied insect Anna found on her impatiens is most likely a/an:

• Spider mite

• Mealy Bug

• Aphid

• Fungus nat

Holes in leaves or parts of leaves missing from bedding plants are most likely caused by:

• Snails

• Caterpillars

• Damping Off

• Overwatering

Which environmental control should Joe use to cause lights to automatically turn on and off at certain times?

• Fans

• Timer

• Thermastat

• Sterilizer

Bedding plant seedlings should be held by the leaves when being transplanted to:

• Avoid injury to stems

• disbud flowering plants

• increase root rot

• pull off dead leaves

Damping-off and botrytis problems can best be reduced by:

• improving air circulation around seedlings.

• reducing light intensity in the greenhouse.

• taking soil samples and using nitrogen.

• using insecticides and baits.

What causes small seedlings to rot at ground level and fall over?

• Aphids

• Damping Off

• Too Much Light

• Under watering