Crop Protection Reviewer- Agriculture Board Exam (Set 2)
- Question of
Yellowing of normally green tissue caused by inadequate light is called
- chlorosis
- Mosaic
- Etiolation
- Blight
- Question of
Disproved the” theory of spontaneous generation”
- Louis Pasteur
- Julius Kuhn
- Franz Unger
- Thomas Burill
- Question of
Wrote the “Philippine Economic Plant Disease”
- Millardet
- Ocfemia
- Exconde
- Reinking
- Question of
Rotting of seedling prior to emergence or rotting of seedling stems at an area just above the soil is known as
- Callus
- Damping off
- Rosetting
- Blast
- Question of
Symptoms of plant disease include the following , except
- Blight
- Mosaic
- Mummified
- Mycelium
- Question of
A science that deals with the nature ,cause and control of plant disease
- Plant pathology
- Plant Physiology
- Plant Taxonomy
- Weed Science
- Question of
An extensive ,usually sudde4n death of host tissue
- Curl
- Spot
- Blight
- Canker
- Question of
The disintegration and decomposition of host tissue
- Shot hole
- Wilting
- Etiolation
- Rotting
- Question of
Hypoplastic symptoms includes the following , except
- Stunting
- Mottle/Mosaic
- Rosetting
- Gall formation
- Question of
A symptom which effects on the distant and uninvaded plant parts
- Secondary symptoms
- Primary symptoms
- Localized symptoms
- Histological symptoms
- Question of
A localized necrotic area also referred to as lesion
- Canker
- Spot
- Wilting
- Mottling
- Question of
Air pollutant that cause plant disease includes the following , except
- Ethylene
- NO2
- Peroxyacetyl nitrate
- CaCO3
- Question of
A term for plant disease which occur on leaves fruits that undergo prolonged exposure to high temperatures and bright sunlight
- Heat necrosis
- Sunscald
- Canker
- Veinclearing
- Question of
The major means of spreading air –borne pathogens
- Wind dissemination
- Dissemination by insect
- Dissemination by man
- Dissemination by rain
- Question of
The presence of different nuclei in the same mycelium
- Parasexual process
- Mutation
- Heterokaryosis
- Cytoplasmic variation
- Question of
Mechanism of variation in fungal plant pathogens includes the following ,except
- Hybridization
- Sexual reproduction
- Mutation
- Transformation
- Question of
A spontaneous heritable change is called
- Transduction
- Biotype
- Mutation
- Transformation
- Question of
A term which involves extraschromosomal heredity factors
- Mutation
- Cytoplasmic variation
- Heterokaryon
- Parasexual process
- Question of
Differ in the host variety they attack although morphologically identical is called
- Physiologic races
- Transduction
- Transformation
- Biotype
- Question of
A nematodes feeding only on root hair and root tips is called
- Endoparasites
- Ectoparasites
- Rickettsia
- Migratory endoparasites
- Question of
A pathogenic naked RNA entities is
- Viroid
- Virus
- Bacterium
- Fungi
- Question of
An obligate intracellular parasites with wavy cell wall
- Protozoa
- Fungi
- Bacterium
- Rickettsia
- Question of
Reduction of plant photosynthetic capacity was due to pathogen that attack the
- Leaves
- Stem
- Roots
- Branches
- Question of
Unicellular organism which reproduce by binary fission
- Fungi
- Bacteria
- Virus
- Protozoa
- Question of
Keeping the pest from becoming a problem is called
- Prediction
- Prevention
- Suppression
- Eradication
- Question of
.Insect pest destroy the crops directly through , except
- Suckling plant sap
- Consuming plant tissues
- Decomposing plant tissues
- Transmitting systemic plant disease
- Question of
Moths , butterflies and skipper belong to what insect order
- Coleoptera
- Orthoptera
- Lepidoptera
- Homoptera
- Question of
An insect order which is considered as a livestock pest
- Thysanoptera
- Diptera
- Orthoptera
- Coleoptera
- Question of
A cause of plant disease which is tiny , simple plant commonly called”mold”
- Fungi
- Virus
- Bacteria
- Nematodes
- Question of
Probably the most common type of nematodes in the Philippines
- Burrowing nematode
- Spiral nematode
- Sting Nematode
- Root knot nematode
- Question of
Distorting and puffing of a leaf due to the unequal development of its sides is called
- Canker
- Curl
- Dieback
- Mosaic
- Question of
All are non parasitic causes of plant disease, except
- Mycoplasma
- Excess or deficiency of nutrient
- Air pollutants
- Lack or excess of soil moisture
- Question of
Inadequate oxygen in potato results to
- Blossom – end rot
- Silver leaf disease
- Blackheart
- Sunscald
- Question of
The detelerious effect of one plant on another is called
- Interference
- Allelopathy
- Competition
- Toxicity
- Question of
Asexual reproduction in plants is called
- Parthenogenesis
- Marcotting
- Grafting
- Apoximis
- Question of
Exposure to low temperature above freezing is called
- Chilling injury
- Freezing injury
- Cold injury
- Exanthema
- Question of
Parasite agent of plant disease which is composed of stable and free ribo-nucleic acids (RNA) that can infect plant cells.
- Virus
- Bacteria
- Viroid
- Mycoplasma
- Question of
An organism which can subsist on non – living materials is called
- Facultative parasite
- Obligate parasites
- Migratory parasites
- Parasite
- Question of
All are signs of plant diseases ,except
- Mycelium
- Mosaic
- Bacterial ooze
- Phanerogram
- Question of
A biennial weed will live for
- One year
- Two years
- Three years
- More than three years
- Question of
The term instars refers to the development stage of
- Plants
- Fungi
- Bacteria
- Insect
- Question of
Plant disease are vector by
- Wind
- Rain
- Insect
- Man
- Question of
Gradual metamorphosis consists of three life stages ,except
- Pupa
- Egg
- Imago
- Nymph
- Question of
A pest which occurs on a regular basis for a given crop is called
- Targeted pest
- Opportunistic pest
- Occasional pest
- Key pest
- Question of
Means a total removal or deduction of a pest
- Quarantine
- Eradication
- Sanitation
- Regulation
- Question of
A herbicide that kill some plant species with little or no injury to others is called
- Contact herbicide
- Systemic herbicide
- Selective herbicide
- Preemergence herbicide
- Question of
A susceptible crop planted to attract a pest into a localized area
- Cash crop
- Permanent crop
- Trap crop
- Root crop
- Question of
Refers to a pest ‘s ability to repopulate after its natural control has been eliminated by a pesticide applications is called
- Pest resurgence
- Pest occurrence
- Pesticide resistance
- Pest outbreak
- Question of
A example of an inorganic pesticide is called
- Pyrethrum
- Rotenone
- Bordeaux mixture
- Organophosphate
- Question of
A fungicide which is applied prior to disease infection is called
- Protectant fungicide
- Eradicant fungicide
- Resistant fungicide
- Synthetic fungicide
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