CROP PROTECTION Flashcards
A harmful alteration of the normal physiological and
biochemical development of a plan
Disease
The science which deals with the nature, causes, and
management of plant diseases.
Plant Pathology
Which statement on the effective use of protective
fungicide is TRUE?
a) Used too little fungicide at the right time and at the right way.
b) Used too much fungicide at the right time and at the right way.
c) Used the exact amount of fungicide at the right time and the right way.
d) Used exact amount of fungicide at any time at anyway.
Which plant grow on another plant are not parasitic? They
usually derived physical support from the host and obtain
nourishment from the air and other sources.
Epiphytes
If you use chemical pesticides, how many days are you
required before flushing the pond water into the river?
5-7 days
Which time of insects life goes through the four (4) stages
of development?
Complete metamorphosis
To avoid snail infestation, farmers can pick snails and feed
them to ______ in the field.
Ducks
Which caterpillar roll a leaf into a tube and feed within the
tied leaves?
Leaf folders
How do we control scale insects on plant leaves? All are advised except:
a. Pick off infected leaves and burn them
b. Clean off insects from leaves with a cotton ball soaked in alcohol
c. Spray leaves with water and alcohol
d. Apply water with salt on infected leaves. A
Which pest is caused by fungi that attack the basal parts of
the plant causing yellowing and drying of leaves?
Fesarium Bulb rot
What is considered as the most destructive group of insect
pest found in Asia that causes low rice yields?
Rice stern borers
Which tiny insect lacerate plant cells and suck plant
juices?
Thrips
Which insect pest of sesame causes the leaves and young
shoots to become wrinkled and deformed as a result of feeding?
Aphid
What classification of disease affecting cattle and carabaos
is comprised of anthrax, black leg, brucellosis, hemorrhagic
septicemia, mastitis and tuberculosis?
Bacteria
To control the attack of rusts in plants you have to:
a. Spray with soap and alcohol daily and pesticides weekly
b. Spray with alcohol and salt every other day
c. Destroy the fungi by applying salt water daily
d. Provide good air circulation and spray with fungicide at weekly intervals
We plant potatoes with _______ to discourage bean beetles:
Beans
Which is not a biological method of controlling insects?
Use of Malathion
What kind of bacteria thrives when there is absence of
oxygen?
Anaerobic
Insect pest known as _________ attacks crops and cuts plants
at ground level.
Cutworms
What is an example of Integrated Pest Management (IPM) that
prevents corn infestation of insects?
a. Use of chemical control substances prices to planting
b. Planting corn varieties year round
c. Spraying strong insecticides from vegetative to reproductive stage
d. Release of 100 trichocards (trichogramma egg parasites)
Non-parasitic plant diseases are due to:
a. Unfavorable soil-water relations
b. Lack or excessive of minerals
c. Environmental factors
d. Presence of nematodes
Which pest take their food by biting off and eating the
leaves and other parts of the plants?
Chewing insects
All of the following insect destroy mungbeans, apple, sitaw,
and soy beans, except:
a. Aphids
b. Leafhoppers
c. Caterpillars
d. Bean flies
What is the insect vector rice disease called “tungro”?
Nephotettix virecena
What kind of organism injures or damages plants?
Pest
Which of these are vegetable diseases?
Leaf mosaic, powdery mildew, anthracnose
Which fungus disease cause discolored paches on foliage,
dropsy, stlaks and prematurely rooting fruits?
Botrytis
Which plant diseases affect the healthy conditions of plants
and characterized as infectious organisms too small to be seen
by the naked eye and easily transmitted by sucking insects?
Viruses
Which of the following will contribute to effective pest
control when properly implemented?
Parasitic control
What insect pest attacks the crop and cuts plants at ground
level?
Cutworm
Which of the symptom of the fruit crop called ringspot?
Appearance of small nearly circular, yellow spots that urn into brown, corky spots with yellow halo on the leaves
The symptom characterized by extensive necrotic area.
Blight
t is used to control weeds?
Herbicide
It is the management of pest by manipulation of the
environment or implementation of preventative practices such as
crop rotation?
Cultural control
Biological control involves the utilization of predators,
parasites, and pathogens to manage pest population below
economic injury level?
Natural enemies
Which crop disease is distinguished by the appearance of
rings of different shades of brown, green, yellow spots on the
leaves?
Leaf spot
Yellowing of leaves and shoots due to lack of light?
Etiolation
The use of tools, implements and machines to reduce or
eliminate weeds, pest and diseases?
Mechanical control
The following are causes of disease, EXCEPT _______.
Bacteria
b. Fungi
c. Viruses
d. Blight
Which fungal disease of plants causes seedlings to rot at
the soil level?
Damping
Which plant disease causes round swelling or growth on
plants?
Galls
Which plant disease blocks the uptake of water?
Root rot
Which plant disease causes small spots that occur mainly on
the underneath side of leaves?
Rust
Which plant disease causes open wounds on woody plant stem?
Canker
Which crop disease causes blisters that burst open releasing
black spores?
Smut
Which crop disease on leaf surface as white, gray or purple
spots?
Mildew
Which crop disease is distinguish by the appearance of rings
of different shades of brown, green, or yellow that make spot on
the leaves?
Leaf spots
which insect pest tear, grind or chew their food?
Chewing insects
Which is a way of controlling plant disease by isolating a
patch of or a single diseases plant?
Quarantine
Which is a combination of two or more methods of controlling
disease to yield a higher chance of effectiveness?
Integrated
