QUESTIONS

QUESTIONS

Q1. The occurrence of leaf spot, twig blight and flower shedding of clove was reported from;
a) Tamil Nadu b) Kerala c) Karnataka d) Orissa.
Q2. Characteristic symptoms of leaf spot of clove appears
a) Ashy-grey centers and darker margins b) White centre and light brown margin c) Brown centre with darker margins. d) None of these
Q3. Heavy and continuous rainfall in clove causes;
a) Shedding of leaves b) Shedding of fruits c) Shedding off flowers
d) Shedding of leaves and fruits.
Q4. Conidia of Colletotrichum gloeosporioides are produced in
a) Perithecia b) Pseudothecia c) Clerodendron d) Acervulus.
Q5. Leaf spot, twig blight and flower shedding of clove is favoured by
a) Heavy and continuous rainfall b) Low humidity and high temperature
c) Low humidity and low temperature d) Low and intermittent rainfall.
Q6. Collateral host of leaf spot twig blight and flower shedding of pathogen clove is:
a) Hycopersicon spp. b) Solanum spp. c) Clerodendron spp. d) Pisum spp.
Q7. Leaf spot disease of clove can be kept under check by sprays of
a) Captan b) Wettable sulphur c) Karathane d) Mancozeb.
Q8.Sudden death disease of clove is caused by:
a) Colletotrichum spp. b) Aspergillus niger c) Valasa eugeniae d) Verticillium spp.
Q9. Ascospores of Valsa eugeniae are produced in
a) Pseudothecia b) perithecia c) cleistothecia d) Acervulus .
Q10. Ascospores of Valsa eugeniae are produced during which season
a) Summer b) Rainy c) Autumn d) Winter.
Q11. In little leaf disease of clove, internodes become:-
a) Elongated . b) Large c)Short d)Wide.
Q12. Little leaf disease is caused by :-
a) Fungus b) Bacteria c) Virus d) Phytoplasma.
Q13. Little leaf of clove can be kept under check by sprays of :-
a) Streptocycline b) Tetracycline. c)Xanthoxycin d) Agromycin.
Q14. Die- back of clove is caused by:
a) Colletotrichum spp. b) Pythium spp. c). Verticillium albo-atrum d) Cryptosporella eugeniae.
Q15. Leaf blight of clove is caused by :
a) Cylindrocladium quinquiseptatum) b) Cylindrocaspore rosae c) Colletotrichum capsici d) Cryptosporella eugeniae .
Q.16. Fenugreek powdery mildew is caused by:
a) Erysiphe cichoracearum b) Erysiphe polygoni c) Erysiphe pisi d) Erysiphe trigonelli
Answer
1.b, 2.a, 3.c, 4d, 5.a, 6.c, 7.d, 8.c, 9.b, 10.b, 11.c, 12.d, 13.b, 14.d, 15.a. 16. b.

Q.No.2 Fill in the blanks
1. Leaf spot, twig and flower shedding disease of clove causes huge losses when the ……….are seriously affected.
2. In leaf spot of clove, spots have ………and ………..margins.
3. In heavy and continuous rainfall ………………. of flowers occurs in leaf spot of clove.
4. Conidia of Colletotrichum gloeosporioides are …………with ………ends.
5. Description of weed ……….in clove gardens help in checking leaf spit, twig blight and flower shedding disease.
6. In rainy season, for the control of leaf spot, twig blight and flower shedding disease, spray the crop with …………
7. The ascorpores of Valsa eugeniae are formed during ……season and are ………of the soil where they infect the ………………
8. Little leaf disease also affects ………..in the necessary.
9. Leaf spot , twig blight and flower shedding is favoured by ------------------------- and -------------------------- rainfall.
10. Sudden death is caused by------------------------------.
11. Little leaf is caused by ----------------------------------.
12. Little leaf is managed by spraying----------------------------.
13. Root rot of Fenugreek is caused by----------------------------------.

Answer
1. Flowers, 2. Ashy-gray centre, darker 3. Profuse shedding, 4. Cylindrical, obtuse, 5. Clerodendron, 6.Bordeaux mixture, 7. Rainy, washed down, roots, 8. Seedlings, 9. Heavy, continuous, 10. Valsa eugeniae, 11. Phytoplasma, 12. Tetracycline 13. Rhizoctonia solani.

Subjective type questions
Q.3. Write down the symptoms, predisposing factors and management of leaf spot, twig blight and flower shedding of clove in detail.
Q.4. Describe in detail the symptoms and causal agent of sudden death of clove.
Q.5. Enlist diseases of Fenugreek. Describe powdery mildew in detail.
Last modified: Wednesday, 7 December 2011, 9:03 AM