12 Questions
What is the reason why equal amounts of herbicides are absorbed by plants, but translocated at different rates?
Better mobility of herbicides in plants
Why is Convolvulus arvensis selective to diphenamid?
Because it rapidly translocates the herbicide from roots to shoots
What is the site of phytotoxic action of diphenamid?
Roots
Why is Avena sativa susceptible to diphenamid?
Because it fails to translocate diphenamid away from its roots
What is the primary function of differential rates of deactivation of herbicide by plants?
Herbicide selectivity in target and non-target plants
What are the possible processes of deactivation of herbicides by plants?
Metabolism, reverse metabolism, or conjugation
What is the primary purpose of using antidotes in crop cultivation?
To offer greater insurance/reliance against crop damage
What is a limitation of using antidotes in crop cultivation?
They increase the toxicity load to the environment
What is the advantage of using granular formulations of herbicides?
They provide selective absorption of the toxicant by weeds
Why do granules of herbicides filter through crop foliage?
To prevent absorption of the herbicide by the crop
What is a desirable characteristic of herbicides embodied in granules?
Low leachability in soils
What happens to the herbicide released from granules in the soil?
It is absorbed by the germinating weeds
This quiz covers the role of antidotes in agricultural business, their benefits and limitations in crop protection, particularly in susceptible crop varieties and adverse weather conditions.
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