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Plant Pathology-4

Q.1
Acervuli formed by the fungus__________.

Fusarium
Alternaria
Colletotricum


Q.2
Mottle leaf of citrus is due to deficiency of________.
Iron
Zinc
Boron


Q.3
Which pathogen of grapes caused heavy losses to wine industry in France due to its epidemics in 1875?
Phytophthora infestans
Plasmopara viticola
Helminthosporium oryzae


Q.4
Downy mildew disease can effectively be managed by spraying of_________.
Metalaxyl MZ
Thiophanate methyl
Mancozeb


Q.5
Potato leaf roll virus is transmitted through___________.
Myzus persicae
Aphis gossypi
Pentalonia nigronervosa


Q.6
Stem parasite of mango is_______.
Striga
Orobanche
Loranthus

Q.7
Which type of soil is most favored for root knot nematode ?

Clay soil
Sandy
Calcareous soil


Q.8
Complete stem parasite of citrus is___________.
Cuscuta
Striga
Orobanche


Q.9
Root knot disease of okra can effectively be managed by_________.
Carbendazim
Carbofuran
Thirum


Q.10
Which insect is transmitting little leaf of brinjal?
Aphid
Thrips
Jassid


Q.11
Mango malformation is caused by_____.
Alternaria solani
Meloidogyne incognita
Fusarium moniliformae


Q.12
Late blight of potato is associated with______.
Bengal famine
France famine
Irish famine


Q.13
Citrus gummosis is caused by_______.
Fusarium spp.
Phytophthora spp.
Colletotricum spp.


Q.14
Alternaria porri is causing disease in onion______.
Onion smudge
Damping off
Purple blotch


Q.15
The causal organism of powdery mildew of grapes is__________.
Plasmopara viticola
Leveillula taurica
Uncinula necator


Q.16
Chilli leaf curl is transmitted through_________.
Aphids
Jassids
White fly


Q.17
Stem gall of coriander is caused by___________.
Cercospora punicae
Colletotricum circinans
Protomyces macrosporus


Q.18
Pacilomyces lilacinus is a bio-agent against__________.
Bacteria
Algae
Nematodes


Q.19
200ppm = _____gm / L. water.
0.2 gm
2 gm
0.02 gm


Q.20
Potato leaf roll virus is transmitted through___________.
Aphis gossypi
Pentalonia nigronervosa
Myzus persicae


Q.21
Bunchy top of banana virus is transmitted through_______.
Myzus persicae
Pentalonia nigronervosa
Bemisia tabaci


Q.22
The mycelium of Leveillula taurica is_____.
Ectophytic
Endophytic
Paraphytic


Q.23
Colletotricum circinans causes which disease in onion_____________.
Purple blotch
Rhizome rot
Smudge


Q.24
Red rust of tea is caused by_________.
Nematodes
Bacteria
Algae


Q.25
Erwinia amylovora causes which disease in apple orchards_________.
Fire blight
Scab
Powdery mildew

Number of score out of 25 = Score in percentage =


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