HORTICULTURE SCIENCE
DISEASE AND PEST MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Biennial Weed
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Perennial Weed
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Annual Weed
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None of the above
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Detailed explanation-1: -The correct answer is Eichorium intybus. Biennial weeds: It completes the vegetative growth in the first season, flowers and set seeds in the succeeding season, and then dies.
Detailed explanation-2: -Examples of biennial plants are members of the onion family including leek, some members of the cabbage family, common mullein, parsley, fennel, Lunaria, silverbeet, black-eyed Susan, sweet William, colic weed, carrot, and some hollyhocks.
Detailed explanation-3: -Based on life span (Ontogeny), weeds are classified as Annual weeds, Biennial weeds and Perennial weeds. a. Annual Weeds. Weeds that live only for a season or a year and complete their life cycle in that season or year are called as annual weeds. These are small herbs with shallow roots and weak stem.