Question

The us accounts for about what percent of worldwide pesticide use?
a. 20
b. 33
c. 50
d. 80
e. 95 ____ 8. after many years of applying the selective pesticide provironex, a farmer notices that the applications seem less effective. this is likely due to
a. the fact that provironex is fat soluble and has been bioaccumulating
b. provironex is selective, so other pests are filling the niche from the exterminated ones
c. provironex is persistent, and the farmer should apply less for better results
d. the target species has begun to evolve resistance

Answer 1

The United States accounts for 20 percent of the world's pesticide use. The farmer is noticing that the pesticide application is less effective because d) the target species has begun to evolve resistance. A is not correct because bioaccumulation would create a greater concentration of the pesticide. B is not correct because the pesticide was selective since the first application. C is not correct because applying less will not prevent the pesto from harming the crop.