Mycoplasma disease of plant was first reported by:
A.Butler
B.Brefeld
C.Anton de Barry
D.Doi et al. and Ishire et al.
Category: Agriculture Plant Pathology Mcqs
Bordeaux mixture was discovered by P.A. Millardet of France during the year 1882 following his chance observation of farmer’s practice for protection against:
A.Plasmopara viticola on grapevine
B.Uncinula nectar on grapevine
C.Podosphaera leucotricha on apple
D.Venturia inequalis on apple
Pectinolytic enzymes of plant pathogens playa major role during pathogenesis in diseases like:
A.Rusts
B.Downy mildew
C.Wilts, damping-off and root/foot rots
D.Powdery mildew
Agar-agar is produced from:
A.Nostoc
B.Macrocrocystis
C.Gelidium
D.Oscillatortia
Black heart of potato is caused due to deficiency of:
A.Boron
B.Zinc
C.Iron
D.Oxygen
Flag smut of sweat could be controlled by:
A.Seed treatment with vitavax
B.Spraying with vitavax
C.Soil application with vitavax
D.Above all
Heterodera belongs to super family:
A.Atylenchoidea
B.Neotylenchoidea
C.Tylenchoidea
D.Heteroderoidea
Ryat is a:
A.Obligate parasite
B.Saprophyte parasite
C.Facultative parasite
D.Predator
Loose smut of wheat is a disease known as:
A.Internally seed borne
B.Externally seed borne
C.Air borne
D.Soil borne
Levillula is a:
A.Ectoparasitic
B.Endoparasitic
C.Both (a) & (b)
D.None of the above
