AGRICULTURAL CROP DISEASE MANAGEMENT CATEGORY 1C EXAM
SCRIPT 2025/2026 QUESTIONS WITH SOLUTIONS GRADED A+
✔✔What are the 4 steps of diagnosing a suspected plant disease? - ✔✔Make
observations, Examine individual plants, Collect background and crop history, and
Diagnose problem
✔✔Best way to distinguish a disease from a noninfectious disorder? - ✔✔A disease will
not appear in a pattern or uniform manner; noninfectious disorders may show up in a
pattern such as slopes in the field, spray drift, down the rows, etc.
✔✔Why is correct disease diagnosis important? - ✔✔It will lead to proper management
measures
✔✔What is IPM? - ✔✔Integrated Pest Management; using all available strategies of
pest management to optimize yields and minimize environmental impact; emphasis on
pest prevention
✔✔Economic Injury Level - ✔✔maximum number of pests that can be tolerated without
significant loss
✔✔Economic Threshold - ✔✔the density of a pest population that justifies a
management measure to keep the pest population from reaching the economic injury
level
✔✔Fungicide - ✔✔chemical or physical agents that kill or inhibit the growth of fungi;
suppress or slow down fungal growth and reproduction
✔✔What are the three names a fungicide may have that can be found on the label? -
✔✔Chemical name, Common name, and Trade name
✔✔What is a Chemical name? - ✔✔the name of the active ingredient in the fungicide
✔✔What is the Common name? - ✔✔a less technical term for the active ingredient
✔✔What is the Trade name? - ✔✔the patented name of the fungicide under which a
product is commercially available; an active ingredient may be marketed under several
different trade names
✔✔What are the different ways a fungicide might be classified? - ✔✔Mobility in the
plant, role in protection of plants, metabolic activity, mode of action, chemical group,
and FRAC code
, ✔✔Contact Fungicides - ✔✔remain on surface of plant where they're applied, no after-
infection activity; repeated applications are needed as it can be washed off over time or
degraded by sunlight
✔✔Systemic Fungicides - ✔✔absorbed into plant tissue and offers after-infection
activity; there are differing degrees of systemic activity (whole plant, just the leaves,
etc.)
✔✔Mode of Action - ✔✔how a fungicide kills or suppresses target fungi; ex. damage
cell membrane, inactivating enzymes, interfering with key processes
✔✔FRAC Code - ✔✔"Fungicide Resistance Action Committee"; represents the mode of
action
✔✔WP - ✔✔Wettable Powder; solid fungicide and a wetting agent, when mixed with
water they form a suspension, need agitation as they settle quickly
✔✔WSP - ✔✔Water Soluble Pouches; fungicides that dissolve in the mixing tank and
release the fungicide, reduces exposure to dust
✔✔D - ✔✔Dusts; powders with inert ingredients to form a product with low
concentration of active ingredient
✔✔G - ✔✔Granules; active ingredient incorporated into small granules of inert material
✔✔EC - ✔✔Emulsifiable Concentrate; fungicides that are insoluble in water, an
emulsifying agent is incorporated so an emulsion will form when mixed with water,
usually has milky appearance
✔✔emulsion - ✔✔suspension of very tiny drops of solvent/fungicide in water
✔✔F - ✔✔Flowables; insoluble fungicides ground into very fine product, particles are
suspended in water to form a thick liquid, they remain suspended for long periods of
time without necessary agitation, dust-free
✔✔DF and DG - ✔✔Dry Flowable and Dispersible Granules; small granules that pour
from a container like a liquid and disperse readily in water
✔✔Why might a fungicide fail? - ✔✔Wrong diagnosis or fungicide selection, improper
storage of fungicides, improper loading of fungicide in the sprayer, poor sprayer
calibration and application, environmental conditions, and resistance
✔✔What is the ideal pH of the water used when mixing and applicating fungicides? -
✔✔7.0
SCRIPT 2025/2026 QUESTIONS WITH SOLUTIONS GRADED A+
✔✔What are the 4 steps of diagnosing a suspected plant disease? - ✔✔Make
observations, Examine individual plants, Collect background and crop history, and
Diagnose problem
✔✔Best way to distinguish a disease from a noninfectious disorder? - ✔✔A disease will
not appear in a pattern or uniform manner; noninfectious disorders may show up in a
pattern such as slopes in the field, spray drift, down the rows, etc.
✔✔Why is correct disease diagnosis important? - ✔✔It will lead to proper management
measures
✔✔What is IPM? - ✔✔Integrated Pest Management; using all available strategies of
pest management to optimize yields and minimize environmental impact; emphasis on
pest prevention
✔✔Economic Injury Level - ✔✔maximum number of pests that can be tolerated without
significant loss
✔✔Economic Threshold - ✔✔the density of a pest population that justifies a
management measure to keep the pest population from reaching the economic injury
level
✔✔Fungicide - ✔✔chemical or physical agents that kill or inhibit the growth of fungi;
suppress or slow down fungal growth and reproduction
✔✔What are the three names a fungicide may have that can be found on the label? -
✔✔Chemical name, Common name, and Trade name
✔✔What is a Chemical name? - ✔✔the name of the active ingredient in the fungicide
✔✔What is the Common name? - ✔✔a less technical term for the active ingredient
✔✔What is the Trade name? - ✔✔the patented name of the fungicide under which a
product is commercially available; an active ingredient may be marketed under several
different trade names
✔✔What are the different ways a fungicide might be classified? - ✔✔Mobility in the
plant, role in protection of plants, metabolic activity, mode of action, chemical group,
and FRAC code
, ✔✔Contact Fungicides - ✔✔remain on surface of plant where they're applied, no after-
infection activity; repeated applications are needed as it can be washed off over time or
degraded by sunlight
✔✔Systemic Fungicides - ✔✔absorbed into plant tissue and offers after-infection
activity; there are differing degrees of systemic activity (whole plant, just the leaves,
etc.)
✔✔Mode of Action - ✔✔how a fungicide kills or suppresses target fungi; ex. damage
cell membrane, inactivating enzymes, interfering with key processes
✔✔FRAC Code - ✔✔"Fungicide Resistance Action Committee"; represents the mode of
action
✔✔WP - ✔✔Wettable Powder; solid fungicide and a wetting agent, when mixed with
water they form a suspension, need agitation as they settle quickly
✔✔WSP - ✔✔Water Soluble Pouches; fungicides that dissolve in the mixing tank and
release the fungicide, reduces exposure to dust
✔✔D - ✔✔Dusts; powders with inert ingredients to form a product with low
concentration of active ingredient
✔✔G - ✔✔Granules; active ingredient incorporated into small granules of inert material
✔✔EC - ✔✔Emulsifiable Concentrate; fungicides that are insoluble in water, an
emulsifying agent is incorporated so an emulsion will form when mixed with water,
usually has milky appearance
✔✔emulsion - ✔✔suspension of very tiny drops of solvent/fungicide in water
✔✔F - ✔✔Flowables; insoluble fungicides ground into very fine product, particles are
suspended in water to form a thick liquid, they remain suspended for long periods of
time without necessary agitation, dust-free
✔✔DF and DG - ✔✔Dry Flowable and Dispersible Granules; small granules that pour
from a container like a liquid and disperse readily in water
✔✔Why might a fungicide fail? - ✔✔Wrong diagnosis or fungicide selection, improper
storage of fungicides, improper loading of fungicide in the sprayer, poor sprayer
calibration and application, environmental conditions, and resistance
✔✔What is the ideal pH of the water used when mixing and applicating fungicides? -
✔✔7.0
