Agronomy 2017

You are spraying a customer's lot in tow with an insecticide to control aphids. The lot is 10,890 square feet. The insecticide you are using states a maximum of 18 oz. per acre. If you use the maximum rate of application, how many ounces of the insecticide could you use?

• 18

• 4.5

• 9

• 12

Which of the following have chewing mouth parts?

• earwigs

• adult moths

• leafhoppers

• aphids

An adjuvant is:

• a type of disinfectant for pruners

• in the pyrethroid chemical class

• a spreader sticker or other application enhancer

• a type of biological control for certain weeds

Which of the following pesticides can be absorbed by the plant and translocated within the plant?

• contact

• systemic

• adsorptive

• volatile

Knowledge of the stages in a pest life cycle, insect or disease, is important because:

• not all stages cause damage or warrant control

• stages vary in their susceptibility to control strategies

• not all stages look alike

• all the above

Keeping crops or desired plants vigorous, healthy, and competitive with weeds is an example of a _ type of weed control.

• mechanical

• chemical

• biological

• cultural

Established perennial weeds are more difficult to control than annual weeds because:

• perennial weeds start growth earlier in the spring than annual weeds

• perennial weeds are not sensitive to most herbicides

• perennial weeds are much bigger than annual weeds

• perennial weeds have stored energy reserves that can support plants when stressed

Which of the following soil types would contain a type of expansive clay that is cracked part of the year?

• vertisols

• histosols

• inceptisols

• peptosols

Mycotoxins are poisonous chemical compounds sometimes found in grain samples. They are produced by:

• bacteria

• viruses

• nematodes

• fungi

In wheat, Feekes' developmental stage 10, or in the "Boot" refers to the stage when the:

• head is about to appear

• seedling emerges

• head of wheat is ripe

• second node appear on the stem