GK
SOIL AND AGRICULTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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‘First blight’ of sugarcane is due to deficiency of nutrient -
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P
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Fe
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Zn
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Mn
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Explanation:
Detailed explanation-1: -Explanation: Symptoms of Mn deficiency in sugarcane is called as Pahala blight. White spots on cholerotic leaf areas become necrotic and turn red, reddish-brown or brown.
Detailed explanation-2: -Symptoms of phosphorus deficiency vary with the different varieties of sugarcane. In this case, a reddish to brown discoloration starts on the main leaf vein and along the leaf edges. Additionally, small whitish spots with a brown seam occur along the midrib.
Detailed explanation-3: -Zinc. Midrib and leaf margin remain green and yellowing of leaf blade. Red lesions on leaves. Reduced tillering and shorter internodes.
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