Units 16-20, 23-32

Postemergence application of an herbicide means that the chemical is applied:

after the crop is up.

A good example of where biological control has worked with at least some success is:

all of the above

A good indoor plant potting mixture may include

all of the above

A new fabric pot for growing trees in the field results in

all of the above

Application of dust insecticides requires

all of the above

Biorational controls are

all of the above

During and after planting the growing median should be

all of the above

Humiditiy around indoor plants can be increased by

all of the above

Natural controls of insects can be accomplished by using

all of the above

The best site or growing area for container plants is one that

all of the above

When a container is too small for the plant growing in it

all of the above

When buying an insecticide to eliminate a specific insect, one should purchase a chemical

all of the above

A new biological weed killer has been discovered. This new herbicide:

all of the above.

Fungicides are chemicals used to control:

all of the above.

The weed killer atrazine kills plants by:

all of the above.

Weeds can be controlled without the use of herbicides by:

all of the above.

Rodenticides generally kill rats and mice:

as stomach poisons, so they must be eaten by the rodents.

Dacthal is a weed killer that is generally applied:

at planting time.

Flowering plants create an attractive seasonal display of color. The _______ is used for its flowering quality

azalea

Preemergence application of herbicides means that the chemical is applied:

before the crop is up.

The herbicide 2,4-D, a synthetic herbicide, is widely used to control:

broadleaf weeds.

Most weed killers are broken down into harmless materials in the soil:

by soil microorganisms.

The newest class of insecticides is insect growth regulators. They control insects by:

changing their normal growth cycle.

Insecticides that reamin active in the environment for the longest period of time are

chlorinated hydrocarbons

If a person is poisoned by pesticides, the most important first aid practice is to_____the poison.

dilute

Emulsifiable concentrates (ECs) are liquid insecticides that must be

diluted with water

Herbicides kill plants by all the methods listed below except for:

drying them up.

Nematodes are tiny hairlike worms that:

feed on plant roots.

In case of inhaled poisons, the first step in first aid is to carry the victim to _____ _____.

fresh air

When handling concentrated pesticides, always protect the eyes with ______ and wear ______ on the hands.

goggles, rubber gloves

Insecticides that come in the form of small pellets are scattered on the soil surface are called

granules

Container growing of plants may be defined as

growing a plant to marketable size in a contianer

Small microorganisms called endophytes protect plants from insects by:

growing inside the plant and protecting it from insects.

A weed is a plant:

growing where it is not wanted.

The initial cost of getting established in container growing of plants is

higher than the cost for field growing of plants

Even if the proper amount of chemical is mixed per gallon of water, the wrong amount of chemical can be applied per acre:

if the wrong amount of spray solution is applied per acre.

A sprayer used to apply herbicides should not be used to spray insecticides on crop plants because:

it is difficult to clean all of the weed killer out of the sprayer.

Nonselective weed killers:

kill all of the plants to which they are applied.

Fungicides cause a protective film to coat plant leaves and:

kill the fungus spore before it can enter the plant cell.

The toxicity of a pesticide is determined by reading the _______.

label

Caladium is used in the interior landscape for its

leaf color

Store all pesticides in a ______ storage area.

locked

Spathiphyllum grows best in

low light

The more poisonous a pesticide, the _______ (higher/lower)the LD50 number is.

lower

An example of a synthetic organic insecticide is

malathion

Synthetic compounds are insect controls that are

man-made pesticides

A white, wooly insect that resembles a ball of cotton and usually infests at the nodes of plants is the

mealybug

An example of an insecticide that is used as a fumigant is

methylbromide

To grow plants in containers (as compared with field growing),___irrigation water is required.

more

Bacillus thuringiensis is a biological control agent that will control:

most caterpillars.

Wettable powders (WPs) are powdered insecticides that

must be diluted with water

Azaleas need a soil mixture of

none of the above

Stomach poison insecticides work best

on chewing insects

Selective weed killers can be used to greatest advantage:

on large acreages of single crop.

Acute toxictiy is a measure of how poisonous a pesticide is after _______ exposure.

one

Allelopathy is a natural phenomenon in which:

one plant secretes chemicals that inhibit root growth or seed germination of other seeds.

The insecticides that are most toxic to human beings are

organophosphates

The three different times for applying weed killers are:

preplant, preemergence, and postemergence.

Growers who grow a variety of plants generally use at least different kinds of growing media or mixes to

provide proper pH for different plants

Chronic toxicity is a measure of how poisonous a pesticide is after ______ exposure.

repeated

An example of a natural organic insecticide is

rotenone

Sails and slugs belong to the same family, but have one main difference. This difference is:

slugs do not have shells; snails do.

If a pesticide is spilled on the skin, it should be washed off immediately with _____ and _____.

soap, water

Fungus diseases are spread by small seedlike structures called:

spores

A new copper chemical, Spin Out, is used to

stop plant roots form circling the inside of the pot

Systemic insecticides are most effective in kiling insects that feed by

sucking or chewing.

An example of an inorganic insecticide is

sulfur

To be sure a herbicide is recommended for use on a specific weed and crop,:

test the chemical on a small sample area first.

The proper amount of spray insecticide has been applied to a plant when

the liquid just begins to drip from the leaves

Some plants produce natural pesticides. One of the most successful new plants producing a natural insecticide is:

the neem tree.

Researchers have found ________ to be an excellent source of plant insect and disease control agents.

the soil.

When indoor plants are overwatered

their leaves turn yellow

Snails and slugs are not often seen eating plants because:

they feed at night.

Contact sprays are not completely effective for slugs because:

they hide under objects such as stones and mulch and are therefore difficult to hit.

Nematodes are controlled with fumigants or soil drenches because:

they live in the soil where these chemicals are able to reach them.

The legs of an insect are attached to the body part known as the

thorax

How many pairs of legs do insects have

three

Leftover spray that has been mixed for use should be disposed of by ______ it on a crop that the pesticide will not damage.

using

Drift of weed killers to nontarget plants can be reduced by:

using a nozzle that sprays larger droplets.

Biological control of plant pests is: (select the best two answers)

using living natural organisms or material for control of plant pests. the oldest pest-control method.

Once the container plants are placed in the growing bed, ____ becomes the most important consideration

watering

The major concerns in caring for interior plants are

watering, light, temperature, and soil mixture

Ideal spacing of container plants for continuing growth is

where the ends of branching almost touch the plant next to them

If a herbicide is to be applied at 2 pints to the acre and the sprayer applies 10 gallons of water to the acre, how much chemical should be mixed in each gallon of water?

0.2 pint

The night time temperatures for indoor plants should be _______ degrees cooler than that of daytime temps

10 to 15

If a pesticide is splashed in the eyes, they should be flushed with clean water for ______ minutes.

15

Crop rotation can help control some soil diseases and some insects. To be effective, rotations should be:

3 or 4 years long.

Norfolk Island pine grows best in a temperature of

50 to 65 degrees

A windbreak will slow the wind that is considered effective for a distance of about

7 times its height

Biological controls are living things that can attack the pests. One example of a biological control is

Bactius themoginus

Cereus is a member of the _____ family

Cactus

The genus name for croton is

Condiaeum

The common name for Dieffenbachia is

Dumbcane

The common name of Hedera helix is

English ivy

An exmaple of a nonselective weed killer is:

Roundup

To pasteurize a container mix, it must be

To pasteurize a container mix, it must be

A soil high in organic matter tends to:

absorb herbicides and cause them to be ineffective.

Fertilizer for plant food added to plant growing mixes must be

added after soil pasteurization by heat

Many root diseases can be controlled by:

adding compost and beneficial microorganisms to the soil.

An insecticide packaged in a pressurized can is called a

aerosol