Question

Which parasitic weed threatening the cultivation of rapeseed-mustard in north-western part of India?

• A. Witch weed
• B. Broomrape
• C. Dodder
• D. Loranthus

Hint:

Broomrape (Orobanche) is a root parasite.
It is particularly problematic in mustard, sunflower, tomato, and tobacco.
Management: Crop rotation, deep ploughing, resistant varieties.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Parasitic weeds are plants that derive their nutrition from host plants.

Step 2: Detailed Explanation:
Broomrape (Orobanche spp.) is a parasitic weed that threatens rapeseed-mustard cultivation in north-western India.
It is a root parasite that attaches to the roots of the host plant.
It causes significant yield losses in mustard and other Brassica crops.
Other parasitic weeds:
- Witch weed (Striga): Attacks cereals (maize, sorghum, millets).
- Dodder (Cuscuta): Attacks many crops including clover, alfalfa.
- Loranthus: Attacks mango, guava, and other fruit trees.
Thus, Broomrape specifically attacks rapeseed-mustard.

Step 3: Final Answer:
Thus, Broomrape is the parasitic weed threatening rapeseed-mustard cultivation.
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