Iowa Commercial Pesticide Applicator Category 1A Exam Questions and Answers | Latest Update 2026/2027 | Graded A+ | 100% Correct.

Iowa Commercial Pesticide Applicator Category 1A Exam Questions and Answers | Latest Update 2026/2027 | Graded A+ | 100% Correct. 1. Most perennial weeds are best controlled with herbicides? True False ANS False 2. Symptoms of soil-applied photosynthesis inhibitors typically appear first on the roots? True False ANS False 3. In calibrating your sprayer after spraying 1/8 acre, you poured 4 1/8 gallons of water back to refill your 100 gallon tank. How many gallons of spray are you spraying? 24 GPA 43 GPA 33 GPA 2 / 43 31 GPA ANS 33 GPA 4. ACCase-inhibiting herbicides such as sethoxydim are primarily root inhibitors. True False ANS False 5. Sulfonylurea herbicides inhibit amino acid synthesis. True False ANS True 6. Herbicides are more likely to leach into groundwater when applied to sandy soils than soils with high organic matter? 3 / 43 True False ANS True 7. Crop rotation and narrow crop rows are examples of cultural control? True False ANS True 8. Triazine herbicides are more likely to carryover on low pH soils (acid) than high pH soils (alkaline) True False ANS False 9. Glyphosate is an example of a plant growth regulator? True False ANS False 10. A sandy soil with 2 percent organic matter would typically require a higher rate of soil applied herbicides than a clay loam soil with 5 percent organic 4 / 43 matter. True False ANS False 11. Most annual weeds germinate in the upper 1/2 inch of the soil. True False ANS True 12. Contact herbicides require better spray coverage that translocated herbicides. True False ANS True 13. Soil-applied herbicides are only translocated in the photosynthetic stream (Phloem). True False ANS False 5 / 43 14. White leaves (bleaching) are a symptom of pigment inhibitors? True False ANS True 15. Air temperature can affect vapor drift. True False ANS True 16. Pesticides that are listed ad 1.5 EC and 90 DF contain 1.5 gallons and 90 lbs of active ingredient. 1.5 qts. and 90 ounces of active ingredient 1.5 pints and 9 quarts of active ingredients