QUESTIONS
| Q.1. Fill in the blanks: i. Jasmine leaf blight is caused by ---------------- and ---------------------------. ii. Conidia of Septoria aichisonia are-------------, ---------------and ------------------. iii. Jasmine wilt is caused by fungi ---------------and------------------. iv. Jasmine anthracnose is caused by -------------------- and ----------------------. v. Leaf spot and stem blemish is favoured by temperatures ranges between------------------- along with --------------humidity. vi. Flower parts in phyllody are transformed into ----------like structures. ANSWER KEY i. Cercospora jasminicola, Alternaria jasmine ii. Filiform, hyaline, multiseptate iii. Fusarium solani, Sclerotium rolfsii iv. Elsinoe jasminae, Colletotrichum jasminicola v. 20oC - 25oC, high vi. leaf Q.2. Choose correct answers from the following questions: 1. Aecial fruiting bodies are raised, orange-coloured and produced in disease like
1. Leaf blight 2. Rust 3. Leaf spot
2. Jasminine mosaic virus is transmitted by which means
1. Grafting 2. White flies 3. Aphids
3. Elsinoe sp. is the causal organism of following disease
1. Blight 2. Stem blemishes 3. Anthracnose
4. Wilt of jasmine is caused by which pathogen
1. Sclerotium rolfsii 2. Verticillum sp. 3.Cylindrosporium sp.
5. Blight symptoms are produced by which pathogen in jasmine
1. Uromyces sp. 2. Cercospora sp. 3. Alternaria sp
6. Circular spots with light yellow and red brown margins on upper side and light –grey on lower surface are the characteristic symptoms of
1.Septoria leaf spot 2. Anthracnose 3. Myrothecium leaf spot
7. Raised spots with slight depressions on the lower sides are produced by
1. Colletotrichum sp. 2. Cylindrosporium sp. 3. Cladosporium sp.
8. Pycnidium is associated with which pathogen
1. Elsinoe sp. 2. Myrothecium sp. 3. Phyllosticta sp.
9. Cylindrocladium sp. causes which disease in jasmine
1. Phyllody 2.Stem blemish 3. Mosaic
10. Yellowish green to chlorotic flecks appear irregularly in disease
1. Rust 2. Mosaic 3. Wilt Answers: 1. 2 2. 1 3. 3 4.1 5. 3 6. 1 7. 1 8. 3 9. 2 10. 1 Q.3. Write true or false against the following statements 1. Spermogonial stage is absent in life cycle of Uromyces hobsoni.
2. Elsinoe jasminae is the causal organism of leaf blight of jasmine. 3. Mycoplasma diseases are generally controlled by use of copper fungicides. 4. Plantavax is used to control anthracnose of jasmine. 5. The transverse and longitudinal septa are observed in Cercospora fungus. 6. Conidia of Alternaria are muriform in shape. 7. Acervuli are produced in anthracnose disease. 8. Transmission of the jasmine virus is through grafting. 9. Cladosporium fungus forms synmeta as a fruiting structure. 10. Phyllody of jasmine is a phytoplasma disease. Answers: 1 T 2. F 3. F 4. F 5. F 6. T 7. T 8. T 9.F 10. T Q. 4. Enlist important diseases of Jasmine along with their causal agents Q.5. Write short note on the following diseases Q. 6. Mention control measures of the following diseases |
Last modified: Wednesday, 7 December 2011, 9:13 AM