Q.1
ICAR AIEEA PG 2024 - Horticulture (Q.33)
Statement Based +4 −1

Superficial rind pitting :

(A) It is a physiological disorder causing serious damage to Shamouti orange
(B) The majority of the symptoms develop 3-5 weeks after harvest
(C) Ethylene increases the incidence
(D) Storage at $5^\circ\text{C}$ increases the incidence

Choose the correct answer from the options given below :

सतही छिलका गड्ढा रोग (Superficial rind pitting) के संबंध में कथनों पर विचार कीजिए :

(A) यह एक कार्यिकीय विकार (physiological disorder) है जो शामूती संतरा (Shamouti orange) को गंभीर नुकसान पहुंचाता है।
(B) अधिकांश लक्षण तुड़ाई के 3-5 सप्ताह बाद विकसित होते हैं।
(C) एथिलीन (Ethylene) इसके प्रकोप को बढ़ाती है।
(D) $5^\circ\text{C}$ पर भंडारण करने से इसका प्रकोप बढ़ जाता है।

नीचे दिए गए विकल्पों में से सही उत्तर चुनें :

  • Statement (A) is correct: Superficial rind pitting (peel collapse) is a major post-harvest physiological rind disorder of 'Shamouti' and 'Valencia' sweet oranges caused by oil gland collapse without involving chilling injury.
  • Statement (B) is correct: Pitting symptoms generally manifest 3 to 5 weeks after harvest during ambient or cold storage.
  • Statement (C) is correct: Degreening with or exposure to external ethylene triggers and significantly accelerates the incidence and severity of rind breakdown.
  • Statement (D) is incorrect: The disorder develops primarily during non-chilling storage temperatures ($\gt 10^\circ\text{C}$ to $17^\circ\text{C}$); low storage temperature ($5^\circ\text{C}$) actually suppresses or delays the expression of non-chilling superficial rind pitting.
Therefore, (A), (B), and (C) only are correct.
  • कथन (A) सही है: सतही छिलका पिटिंग शामूती संतरे (Shamouti orange) का एक प्रमुख तुड़ाई-उपरांत कार्यिकीय विकार है।
  • कथन (B) सही है: इसके लक्षण तुड़ाई के लगभग 3 से 5 सप्ताह बाद भंडारण में दिखाई देते हैं।
  • कथन (C) सही है: बाहरी एथिलीन के संपर्क में आने से यह विकार तेजी से बढ़ता है।
  • कथन (D) गलत है: यह विकार $10^\circ\text{C}$ से अधिक तापमान पर अधिक होता है; $5^\circ\text{C}$ पर इसका प्रकोप कम/विलंबित होता है।
अतः केवल (A), (B) और (C) सही हैं।
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