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Agriculture Exams (Agri Croppro) – Page 10

#181. A group of substances secreted by pathogens that interfere with the permeability of protoplast membrane
A Enzymes
B Growth regulators
C Toxins
D Suppressors
Answer: Toxins
#182. Fungi that only reproduce asexually
A Ascomycetes
B Zygomycetes
C Deuteromycetes
D Basidiomycetes
Answer: Deutermycetes
#183. In a life cycle of a typical myxomycete, the myxamoeba are usually formed during
A Dry condition
B Humid condition
C Hot condition
D Sunny condition
Answer: Humid condition
#184. The naming of newly discovered fungal species is based commonly on
A Location
B Host
C Distinct structural character
D Well-known mycologist
Answer: Distinct structural character
#185. Non-parasitic fungi which are present on plant parts with deposit of insects, particularly aphids and scale insects.
A Downy mildew fungi
B Powdery mildew fungi
C Sooty mold fungi
D Slime molds
Answer: Sooty mold fungi
#186. Growth of germ tube towards hosts or substrates may be due to chemicals. This condition is
A Thigmotropism
B Phototropism
C Chemotropism
D Aerotropism
Answer: Chemotropism
#187. Phylogenetic classification of fungi is based on
A Character sets
B Ultrastructural features
C Hyphal arrangement
D Evolutionary relationship
Answer: Evolutionary relationship
#188. A subgroup within a specie usually characterized by the common possession of a single or few new characters
A Biotype
B Race
C Strain
D Formae speciales
Answer: Biotype
#189. A fungal insect parasite
A Metarrhizium
B Curvularia
C Gilmaniella
D Choanepora
Answer: Metarrhizium
#190. The most common infectious agents of plant disease
A Bacteria
B Fungi
C Nematodes
D Phanerogams
Answer: Fungi
#191. Sigatoka is a fungal disease of
A Mango
B Banana
C Citrus
D Rice
Answer: Banana
#192. The causal agent of mango anthracnose is
A Lasiodiplodia theobromae
B Diplodia natalensis
C Sphaceloma fawcetti
D Colletotrichum gloeosporioides
Answer: Colletotrichum gloeosporioides
#193. Peronosclerospora philippinesis is the causal agent of
A Corn downy
B Downy mildew of grapes
C Downy mildew of crucifer
D Downy mildew of cucurbits
Answer: Corn downy
#194. The causal agent of corn rust is
A Uromyces phaseoli
B Bipolaris maydis
C Puccinia polysora
D Ustilago maydis-zeae
Answer: Puccinia polysora
#195. Gibberella fujikuroi is the causal agent of
A Bakanae of rice
B Rice sheath blight
C Brown spot
D Rice blast
Answer: Bakanae of rice
#196. Rice fungal disease that caused the Bengal famine in 1943
A Rice blast
B Rice tungro
C Brown spot
D Rice sheath blight
Answer: Brown spot
#197. Fungal disease that destroyed the coffee industry of Batangas
A Rust
B Fusarium wilt
C Twig blight
D Scierotium rot
Answer: Rust
#198. Fungal pathogens that do not produce any spores
A Oidium and Ciadosporium
B Rhizoctonia and Sclerotium
C Fusarium and Helminthosporium
D Colletotrichum and Gloeosporium
Answer: Rhizoctonia and Sclerotium
#199. Which is not included in Koch's postulates?
A association
B isolation
C inoculation
D colonization
Answer: colonization
#200. Effective seed treatment fungicide against corn downy mildew
A macozeb
B captan
C metalaxyl
D benomyl
Answer: metalaxyl
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