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Illinois Pesticide Seed Treatment Exam Questions and Complete Solutions Graded A+
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Illinois Pesticide Seed Treatment Exam Questions and Complete Solutions Graded A+
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Illinois Pesticide SeedTreatment Exam
Questions and Complete
Solutions Graded A+
seed treatment - Answer: Chemical or biological substances that are applied to seed or vegetative
propagation materials to control disease organisms, insects, or other pests
Types of seed treatments - Answer: Fungicides
Bactericides
Insecticides
Herbicide antidotes
Adjuvants - Answer: "Affect the pesticide"
Increase effectiveness or safety of a pesticide
Additives - Answer: "Affect the seed"
Example: colorant, drying powder, lubricants
Fungi - Answer: Small organisms that are mostly saprophytic(live on dead plant or animal material) but a
few pathogenic(live in live plants or animals
Bacteria - Answer: Single-called organisms that reproduce by division
viral - Answer: Consist of either DNA or RNA with a protein coat
, Common bunt of wheat - Answer: (Affected)Bunted heads stay blueish gray longer.
Infected seeds are filled with dark dusty spores.
Infected kernels have a strong fish odor "stinking bunt"
Persists in seed & in soil
Loose smut of wheat - Answer: Fungus lies dormant within the wheat seeds embryo until germination.
Seeds show no visible signs of infection
Infected plants form heads early, but produce masses of powdery black spores instead of seed
Pythium & Phytophthora - Answer: Fungal-like organisms & are considered "water molds".
Common in no-till fields or low-lying ares of the field that are prone to flooding.
Phythium - Answer: Germinates in cooler soils (50* to 60*F)
Infect a wide range of broadleaf and grass seed and seedlings.
Damping off in Pre of Post emergence
Phytophthora - Answer: Germinates in warmer soils (60*F)
Restricted to a few broadleaf crops (Soybeans, Alfalfa)
Affects any growth stage from seed to Maturity
Causes seed rot Pre and Post emergece damping off
Fusarium Seedling Blight - Answer: Wheat seedling blight infections result from seedborn innoculum
soilborne inoculum ca damage seedlings in warm soils
seedlings are killed before or soon after emergence
seedlings that emerge are stunted, turn yellow and die
Roots are off color to dark black or completely rotted
Covered with a mass of pink or grayish mold
Rhizoctonia - Answer: known for effects on soybeans
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