QUESTIONS

QUESTIONS

Q.No.1 Tick the correct answer
1. Wilt of Cumin is caused by:
a) Fusarium solani b) Fusarium equiseti c) Ralstonia solanacearum
d) Fusarium oxysporum f.sp. cumini
2. Fusarium oxysporum f.sp. cumini overwinters in the form of:
a) Oospore b) Cleistothecia c) Chlamydospore d) Perithecia
3. Wilt can be checked with seed treatment of
a) Mancozeb b) Copper oxychloride c) Wettable sulphur d) Carbendazim
4. Application of decomposable organic matter helps in reducing:
a) Seed borne diseases b) Soil borne diseases c) Foliar diseases d) Fruit diseases
5. Blight of Cumin is caused by:
a) Bacteria b) Fungi c) Nematodes d) Virus
6. Blight of Cumin is caused by:
a) Alternaria alternata b) Alternaria solani c) Alternaria burnsii
d) Alternaria brassicae
7. Severity of cumin blight is aggravated in:
a) High temperature and high humidity b)Clear and humid weather
c)Foggy and dry weather d) Cloudy and Humid weather
8. Optimum temperature range for cumin blight development is:
a) 10-15o C b) 15-20o C c) 23-28o C d) 30-32o C
9. Cumin blight can be checked with seed treatment of:
a) Copper oxychloride b) Wettable sulphur c) Carbendazim d) Captan
10. Spread of cumin blight can be limited with sprays of:
a) Carbendazim b) Mancozeb c) Benomyl d) Thiophanate methyl
11. Powdery mildew pathogen overwinters in the form of:
a) Cleistothecia b) Oospore c) Chlamydospore d) Planospore
12. In the absence of Cleistothecia , powdery mildew pathogen overwinters in the form of:
a) Ascospore b) Perithecia c) Conidia d) Chlamydospore
13. Optimum temperature for powdery mildew spread is:
a) 5-12o C b) 10-15o C c) 22 to 25o C d) 26-35 o C
14. Witches broom of Cumin is caused by:
a) Virus b) Bacteria c) Phytoplasma d) Rickettesia
15. Witche’s broom can be suppressed by application of:
a) Sodium chloride b) Streptomycin sulphate c) Chloromycetin
d) Tetracycline hydrochloride
Answers
1 d 2 c 3 d 4 b 5 b 6 c 7 d 8 c 9 d 10 b 11 a 12 c 13 d 14 c 15 d

Q.No. 2. Fill in the blanks
1. --------------------- has been found effective in suppressing witches broom.
2. Powdery mildew can be effectively controlled by sprays of--------------------,------------------------- and-------------------------.
3. Wherever ---------------------- are formed they explain the disease cycle of powdery mildew.
4. Powdery mildew may cause losses upto -------------- per cent during the year of epiphytotics.
5. Powdery mildew affected plants bear ----------------------, --------------------- and ----------------- seeds.
6. Alternaria burnsii is both --------------- and ------------ borne.
7. Wilt of cumin can be checked with ---- to ------- summer ploughings.
8. Cumin blight was first recorded from -------------- district of-------------------.
9. Alternaria burnsii causes ________________ disease in cumin while powdery mildew is incited by ______________.
10. A temperature range of ---------------------- is optimum for blight of cumin.
11. Blight tolerant lines of cumin are---------------, ----------------- and --------------.
12. Optimum temperature for cumin powdery mildew spread is -------------- o C.
13. Witches broom is cuased by----------------------------.

Answers : 1 Tetracycline hydrochloride 2 Dinocap, carbendazim, Hexaconazole 3 Cleistothecia 4. 50 5. Few, shriveled, light weight 6 Seed, soil 7 Two, three 8. Kaira, Gujrat 9. blight, Erysiphe polygoni 10. 23 – 28o C 11. MC-43, Gujrat Cumin-1, RZ-19 and Gujrat cumin-2 12. 26.7 to 35o C 13. phytoplasma


Subjective type questions:
Q. 1. Describe the symptoms and management practices of the following diseases:
a) Wilt of Cumin
b) Blight
c) Powdery mildew
Q. 2. Write down the disease cycle and favourable environmental conditions for the following diseases:
a) Powdery mildew
b) Wilt
c) Powdery mildew
Q.3. Describe in brief the management practices for witches broom of cumin.
Last modified: Wednesday, 7 December 2011, 7:44 AM