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Bacholer of science botany notes

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Exam of 5 pages for the course Neet at Neet (Bacholer of science)

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प्रश्न 1: कवक से सॊक्रमभत ऩयऩोषी (Powdery Mildew) भें योग के रऺणों का अवरोकन कयें तथा योगजनक
की ऩहचान कयें ।
प्रश्न 2: जीवाणु से सॊक्रमभत ऩयऩोषी (Citrus Canker) भें योग के रऺणों का अवरोकन कयें तथा योगजनक
की ऩहचान कयें ।

प्रश्न 3: ववषाणु से सॊक्रमभत ऩयऩोषी (Tobacco Mosaic Virus - TMV) भें योग के रऺणों का अवरोकन कयें
तथा योगजनक की ऩहचान कयें ।

प्रश्न 4: पाइटोप्राज्भा से सॊक्रमभत ऩयऩोषी (Brinjal Little Leaf) भें योग के रऺणों का अवरोकन कयें तथा
योगजनक की ऩहचान कयें ।

प्रश्न 5: योगग्रस्त साभग्री की काट-छाॉटकय जाॉच कयें तथा सैद्ाॊततक ऩाठ्मक्रभ के अनुसाय योगजनक
(Alternaria - fungal) की ऩहचान कयें ।




प्रश्न 1: कवक से सॊक्रमभत ऩयऩोषी (Powdery Mildew) भें योग के रऺणों का अवरोकन कयें तथा योगजनक
की ऩहचान कयें ।

उत्तय: मह योग भुख्मत् Erysiphe spp. (कवक) द्वाया होता है । रऺण: ऩत्त्तमों, तनों तथा पूरों ऩय सपेद
ऩाउडय जैसा रेऩ (mycelium + conidia) ददखाई दे ता है । ऩत्त्तमाॉ ऩीरी ऩड़कय सूख जाती हैं। ऩहचान:
योगग्रस्त ऩत्ती को काटकय lactophenol cotton blue से stain कय भाइक्रोस्कोऩ भें दे खने ऩय septate
mycelium, haustoria तथा conidiophore ऩय conidia की श्ॊख
र रा ददखती है ।

, प्रश्न 2: जीवाणु से सॊक्रमभत ऩयऩोषी (Citrus Canker) भें योग के रऺणों का अवरोकन कयें तथा योगजनक
की ऩहचान कयें ।

उत्तय: मह योग Xanthomonas axonopodis pv. citri (Gram-negative rod bacterium) द्वाया होता है । रऺण:
ऩत्त्तमों, तनों तथा परों ऩय उठे हुए, बूये-कॉकी घाव (canker) फनते हैं त्जनके चायों ओय ऩीरा हे रो (halo)
होता है । ऩहचान: योगग्रस्त बाग को काटकय water drop भें यखने ऩय bacterial ooze तनकरता है । Gram
staining से Gram-negative rods ददखते हैं।

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