Question
Which of the following statements are correct about weed
shift? Statement I - SusceptibleĀ speciesĀ areĀ killedĀ byĀ theĀ weedĀ managementĀ practicesĀ whileĀ resistantĀ ones grow, reproduce, and increase in the community, resulting in a weed shift. Statement II - A weedĀ shift means that the habitat of a weed species is changed due to change in environmental conditions.Solution
Weed shift refers to changeĀ inĀ compositionĀ orĀ relativeĀ frequenciesĀ ofĀ weedsĀ inĀ aĀ weedĀ populationĀ inĀ responseĀ to naturalĀ orĀ human-made environmentalĀ changesĀ inĀ anĀ agriculturalĀ systemĀ isĀ knownĀ asĀ weed shift.
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