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