NEET BIOLOGY

Detailed explanation-1: -The deficiency of Manganese leads to a grey spot of Oat disease. In this condition, the brown elongated speck and streaks are found in panicles. Development of the root system is poor.

Detailed explanation-2: -Grey spots of Oat are due to deficiency of Manganese.

Detailed explanation-3: -Nitrogen deficiency is the most common nutrient deficiency in oats especially during cold, wet conditions and in well-drained soils in high rainfall areas.

Detailed explanation-4: -Grey speck disease of oat and barley is a non pathogenic deficiency disease. It occurs due to deficiency of manganese. In the case of severe deficiency, the crop can die completely.

Detailed explanation-5: -So, the correct answer is ‘Etiolation’