Oil from American elm seed contains 55 per cent capric acid toxic to Ceratocystis uimi the pathogen causing the famous _____ disease:
A.English elm
B.Dutch elm
C.American elm
D.French elm
Category: Agriculture Plant Pathology Mcqs
Plant pathogenic viroids contain:
A.Externally seed-borne disease
B.Externally seed-borne and soil-borne disease
C.Air-brone disease
D.Inernally seed-borne disease
Nematode genus Hoplolaimus Daday was first recorded in _____ from an island in the Paraguay river:
A.1900
B.1905
C.1910
D.1915
Domestic quarantine exists on:
A.Rice blast
B.Red rot of sugarcano
C.Wart of potato
D.Run of wheat
A bacterium is devoid of:
A.Chlorophyl
B.Well defined nucleus
C.Cell wall
D.Both (a) & (b)
Micro organisms were first observed by:
A.John Tyndall
B.L.J. Thernard
C.Antony Van Leeuwenhock
D.Louis Pasteur
Mycoplasma is sensitive to:
A.Pencillin
B.Steptomycin
C.Bavistin
D.Tetracycline
Most of the plant parasitic nematodes belong to order:
A.Tylenchida
B.Dorylaimida
C.Aphelenchida
D.Rhabditida
Nematodes are also known as:
A.Tapeworms
B.Trematodes
C.Earthworms
D.Round worms
How much quantity of nematicide is used to control the nematodes in one hectare are?
A.10 – 15 kg
B.20 – 25 kg
C.50 – 60 kg
D.100 – 200 kg
