Floriculture - Greenhouse & Horticulture

Ridge and furrow greenhouses by definition, are

greenhouses connected to one another along the length

Which statement is not true about pot sizes used in greenhouse production?

A standard pot is shorter in height than width

The term "forcing" in greenhouse plant production is:

a term used to describe the practices that get bulbs to grow and produce flowers

With mat irrigation, water moves by ___________________ from the mat into the root substrate in the pot to maintain constant moisture.

capillary action

When propagating asexually, roses can be reproduced from __________.

d. all of the above

The ___________________ phase begins when a plant's seed germinates and grows producing leaves, stems, and roots.

vegetative

Mass flowers include all of the following except:

baby's breath

Crassula argentea is the botanical name for jade plant. Crassula is the ______________________ of the plant.

genus

The term variegated means?

leaves have patches, stripes, or marks of different colors

A plant that lives for more than two years, usually flowering every year.

perennial

The general rule to use to transplant seedlings is after:

The first true leaves have developed

Which is the most common form of sexual plant propagation?

seeds

Acclimatization in plant production is:

process in which plants adjust to a different growing environment

Which of the following statements are true about Carbon Dioxide and greenhouse plant growth?

Limited Carbon Dioxide in the greenhouse reduces photosynthesis and therefore plant growth

The presence of sticky 'honeydew' drops on the leaves of plants within agreenhouse production system could indicate which of the following pests:

aphid

What do many spring flowering bulb crops require in order to flower?

vernalization

What is a miniature arachnid that sucks sap from plants?

mite

Which watering system is commonly used in the propagation phase of production because it reduces water stress on cuttings?

intermittent mist systems

What is the number one pest problem with poinsettias?

whiteflies

What is the best explanation for why bedding plant seeds are sown in rows?

to reduce the possible spread of disease across an entire flat

A purlin in greenhouse construction is used for what purpose?

A component of the greenhouse frame running the length of the greenhouse just below the roof covering that connects trusses together.

REI to a greenhouse worker means:

Restricted Entry Interval

Poinsettias are very susceptible to root rot diseases caused by Pythium, Rhizoctonia, and Thielaviopsis fungi. How can these disease problems be reduced?

Apply fungicides when appropriate and adhere to proper watering.

Many daylily, dahlia, and gladiola varieties are polyploid, which means that they have more than one set of

chromosomes

The pigment _____________ produces orange-yellow flowers.

carotene

How are chrysanthemums classified?

by response group, height, and flower form

What is the best explanation why bedding plant seeds are sown in rows?

to reduce the possible spread of disease across an entire flat

What are small plants grown in small amounts of medium in divided trays?

plugs

Double layer poly should have how much space between layers for proper inflation and full insulation?

6-8 inches

Botrytis often presents itself on flowers as gray mold. This disease is caused by a(an) __________.

fungus

Greenhouse production often requires insecticides to be sprayed to prevent insect damage on flowers. Insecticides that are applied in gaseous form are ________________________.

fumigants

Rubber Plants are commonly reproduced through an asexual propagation method known as ___________, which is shown to the right.

air layering

A growing media amendment that is grown primarily in marshes, bogs or swamps and has a high-water holding capacity is known as ___________.

peat moss

In order to have a year-round supply of cut flowers, such as Tulips and Crocus, that grow from bulbs; greenhouse growers are known to __________ bulbs. This means they plant bulbs out of season and grow them in a cold or refrigerated area for 10-12 weeks.

force

Which of the following greenhouse substrate components is derived from volcanic rock?

perlite

The primary benefit(s) of shading a greenhouse is (are):

A and B

A greenhouse pest that is small with tan, feather-like wings would likely be a ______________________.

Western flower thrip

_______________ is when a plant secretes a substance to inhibit growth of another plant.

Allelopathy

__________ is the development of a plant from a seed or spore.

Germination