Hort 2: 4.02

Heaters, fans, cooling pads, and ventilators are mostly used in a greenhouse to control:

• light

• moisture

• sanitation

• temperature

Bedding plant production problems fall into which three groups?

• Chemicals, fertilizers, and pH

• Cultural disorders, diseases, and pests

• Media, containers, and labels

• Snails, slugs, and mice

What can be done to prevent germination problems?

• Grade plants by size and quality.

• Improve insect control.

• Plant high-quality seeds at the correct depth.

• Use B-Nine SP growth retardant.

Before being transplanted, seedlings should:

• be disbudded.

• be 6" tall.

• have flowers.

• have true leaves.

When seedlings are transplanted in new containers from flats, they should be planted:

• much deeper.

• not as deep.

• at the same depth.

• slightly deeper.

Which type of structure does the school have if its greenhouse is built against the agriculture building and has a roof that slopes in only one direction?

• Lean-to

• Even span

• Uneven span

• Quonset

As preventive maintenance for possible structural problems, which will Matthew check and repair in his greenhouse?

• Exhaust fan belt

• Photocell

• Plastic greenhouse cover

• Trash can lid

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

• avoid injury to stems.

• disbud flowering plants.

• increase stem rot.

• pull off dead leaves.

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

• bark.

• peat moss.

• vermiculite

• perlite.

Which insect's larva burrows into the lower epidermis of the leaf leaving a pale green to silvery trail?

• Spider mite

• Mealybug

• Aphid

• Leaf miner