Question:

Mahua oil cake contain

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Mahua oil cake serves a dual purpose in pond preparation: it acts as a natural piscicide to clear wild fish, and then breaks down into a nutrient-rich organic fertilizer.
  • 4-6% Saponin
  • 5-6% Mowrin
  • 10-15% Saponin
  • 5% Rotenone
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The Correct Option is A

Solution and Explanation

Step 1: Understanding the Concept:
Mahua oil cake (derived from the seeds of Madhuca latifolia) is widely used during pond preparation to eradicate predatory and weed fishes.

Step 2: Detailed Explanation:

Mahua oil cake contains an active toxic saponin compound called mowrin.
Saponin acts as a hemolytic poison when it enters the fish's bloodstream through the gills, destroying red blood cells and leading to mortality.
The concentration of saponin in Mahua oil cake is typically around \(4\text{--}6\%\).
It is applied at a rate of \(250\text{ ppm}\) (\(2500\text{ kg/ha-m}\)).
The toxicity remains in the water for about \(10\text{ to }15\) days, after which it detoxifies naturally and acts as a rich organic nitrogen fertilizer.

Step 3: Final Answer:

Mahua oil cake contains \(4\text{-}6\%\) Saponin.
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