General Knowledge 2016
Terms in this set (50)
DIF, used for height management of crops, is the difference between the daytime temperature and:
In commercial greenhouses, which of the following methods are commonly used as a way to regulate plant growth without using chemicals?
Crop timing, water stress, and container size.
Agrobacterium tumefaciens is a pathogen that is commonly known as:
The recommended pH level for greenhouse crops in a soilless medium is:
The virtual visual path that directs eye movement through a composition is__________.
Orange, green and violet are________ colors.
The fundamental guidelines to aesthetic design that governs the organization of the elements and materials in accordance with the laws of nature are known the __________.
Principles of Design.
Which of the following is NOT a plant hormone that can be used as a plant growth regulator?
A 28 gauge florist wire is ______ than 18 gauge florist wire.
The LD50 of a pesticide indicates:
The amount of the pesticide required to kill half of a test population of the test
Pesticide toxicity is measured in LD50 or LC50 numbers. Which of the following LD50 numbers for pesticides is the most toxic?
The planned area within a floral design, which is devoid of flowers, foliage or other objects, but is still integral to the design is known as ___________.
The placement of materials at different levels within and around a floral arrangement helps to establish _____________.
With mat irrigation, water moves by ____________ from the mat into the root substrate in the pot to maintain constant moisture.
The cost of the plant materials (i.e. cost of seeds, cuttings, bulbs, or other plant propagules) would be examples of ______ costs on a financial planning sheet.
Achromatic, monochromatic, analogous and complementary are a few of the classically recognized ___________.
When propagating asexually, roses can be reproduced from____________________.
Vegetative cuttings, budded plants, and grafted plants.
Soil pH is based on the concentration of ____________ ions in the soil.
Which of these describes edema in geraniums?
Water soaked blisters generally on the underside of the leaf.
Which of the following is NOT a part of the pistil of the plant?
The phase begins when a plant's seed germinates and grows, producing leaves, stems, and roots.
The tiny pores in the epidermis of a leaf through which gas enters and escapes are _____.
The process of a plant losing water through the leaves in the form of water vapor is referred to as ________.
The waxy coating, called the _____________, serves to prevent excessive water loss from the leaf tissues.
Lime furnishes ______________, one of the most important of the macro food elements.
Auxin is responsible for apical dominance in plants. Auxin is produced in three places in the plant located in the:
Shoot tips, young leaf blades, and root tips.
A complete fertilizer is recommended for a greenhouse crop. Which fertilizer analysis below is NOT a complete fertilizer?
Mass flowers include all of the following except:
Two hues directly opposite each other on the color wheel are _________ colors.
Broken, implied, and continuous are all part of which element of floral design?
Light inside a greenhouse is measured in ________________________.
Poinsettias require a ______________ to produce colored bracts.
Short day photoperiod.
Thrips can be effectively managed in the greenhouse by using:
a biological control such as the predator 'swirski mite', a chemical control such as the insecticide spinosad, and screening over vents and other openings.
An insect generally does not kill insects, but instead drives them away before they attack the plant.
To help identify plants, flower forms are grouped as to their position or arrangement on a stem. The flower position or arrangement is known as:
After pollination and fertilization, the flower petals begin to drop and the ovary and other surrounding parts enlarge and develop into a:
Which of the following diseases does NOT affect the root system of plants?
The Environmental Protection Agency establishes toxicity categories for pesticides based on how soon one can reenter the area after it has been treated with the pesticide. Which toxicity level can be reentered immediately after pesticide application?
In order to preserve foliage in a more natural, pliable state, place stems in:
Greenhouse glazing is:
The transparent cover of the greenhouse frame.
When water is not applied frequently enough, plants wilt and:
Photosynthesis is slowed, plant growth is slowed, and cell production is reduced.
Plants are divided into C3 and C4 groups. C4 plants are differentiated from C3 plants by which of the following?
C4 plants have a higher relative photosynthesis rate.
A plant that is genetically identical to the parent plant is known as a ________.
Cross-pollination occurs when pollen grains from the flowers on one plant transfer to the of flowers on another plant.
Is a process of events whereby the seed embryo goes from a dormant state to an actively growing state.
Some seeds have a hard seed coat that must be soaked or scratched before the seeds are able to germinate. This process is called.
The is the food storage tissue in the seed that nourishes the plant during germination.
Is a gray-white soil mix material of volcanic origin that is most commonly used to improve aeration of growing media.
The ability of a plant to withstand colder temperatures is known as.
Are plants characterized by one cotyledon in the seedling stage, flower parts in threes or multiples thereof, and parallel leaf venation.
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