This quiz focuses on crucial topics like Plant Pathology and Entomology. Test your knowledge, identify areas for improvement, and excel in your upcoming agriculture exams!
1. The phenomenon of variability among fungi was first discovered by -
Erickson
Ward
Stakman
Vander Plank
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Correct Answer: Erickson Erickson first described heterokaryosis in fungi, a key mechanism contributing to their genetic variability. This discovery was foundational to understanding fungal adaptation.
2. Which one of the following rusts is autoecious in nature?
Melampsora lini
Puccinia graminis
Puccinia coronata
Phakopsora meibomiae
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Correct Answer: Melampsora lini Autoecious rusts like Melampsora lini complete their entire life cycle on a single host species (flax). Other Puccinia species listed are heteroecious, requiring alternate hosts.
3. Which one is not an obligate parasitic fungus?
Albugo
Erysiphe
Alternaria
Peronospora
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Correct Answer: Alternaria Alternaria species are facultative parasites or saprophytes, able to live on dead matter or infect plants. Albugo, Erysiphe, and Peronospora require a living host (obligate parasites).
4. Tentoxin is produced by which fungus, which causes spots and chlorosis in plants?
Alternaria alternata
Alternaria brassicae
Alternaria brassicicola
Alternaria solani
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Correct Answer: Alternaria alternata Tentoxin, a phytotoxin causing chlorosis and spots, is specifically produced by the fungus Alternaria alternata. It disrupts chloroplast function in susceptible plants.
5. The shape of cauliflower mosaic virus is -
Spheroidal
Rod
Geminate
Filamentous
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Correct Answer: Spheroidal Cauliflower Mosaic Virus (CaMV) particles (virions) have an isometric or spheroidal (roughly spherical) shape. This morphology is characteristic of the Caulimovirus genus.
6. Downy mildew of Bajra in caused by -
Sclerospora graminicola
Peronospora parasitica
Sclerophthora rayssiae
Sclerospora sacchari
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Correct Answer: Sclerospora graminicola The specific causal agent of downy mildew (green ear disease) in bajra (pearl millet) is Sclerospora graminicola. Other listed fungi cause downy mildews in different crops.
7. In each virus, there is always -
only RNA
only DNA
only RNA or only DNA
Both RNA and DNA
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Correct Answer: only RNA or only DNA A fundamental characteristic of viruses is possessing a genome of either DNA or RNA, never both together. This nucleic acid can be single or double-stranded.
8. Which one is the most common mycoparasitic fungi?
Paecilomyces lilacinus
Trichoderma harzianum
Coniothyrium minitans
Aspergillus niger
âś“
Correct Answer: Trichoderma harzianum Trichoderma harzianum is a very common and widely studied mycoparasite, known for parasitizing other fungi. It is extensively used as a biocontrol agent in agriculture.
9. Powdery mildew of tomato is caused by -
Erysiphe cichoracearum
Erysiphe polygoni
Erysiphe betae
Erysiphe orontii
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Correct Answer: This question was deleted as per the answer key (*). Multiple fungi cause tomato powdery mildew, including Oidium/Erysiphe neolycopersici and Leveillula taurica.
10. Which one of the following pair is not correctly matched?
Rock bee - Apis dorsata
Little bee - Apis florea
Indian bee - Apis indica
Italian bee - Melipona iridipennis
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Correct Answer: Italian bee - Melipona iridipennis The Italian bee is Apis mellifera ligustica, while Melipona iridipennis is a stingless bee species. The other pairs correctly match common bee names to their Apis species.
11. Which one of the following pair is correctly matched?
Azodrin-monocrotophos
Baygon-fenthion
Dursban-phosphamidon
DDVP-Malathion
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Correct Answer: Azodrin-monocrotophos Azodrin is a widely known trade name for the organophosphate insecticide monocrotophos. The other options incorrectly pair trade names with active ingredients.
12. Rasping and sucking type mouth parts are found in which insect?
Aphid
Leafhopper
Whitefly
Thrips
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Correct Answer: Thrips Thrips possess unique asymmetrical mouthparts used to rasp or puncture plant surfaces and then suck the released cell contents. This differs from the piercing-sucking mouthparts of aphids, leafhoppers, and whiteflies.
13. The Book 'Silent Spring' to create awareness about ill effect of pesticides was written by-
Ngozi Okonjo Iweala
L. Maxwell
Rachel Carson
Clark & Geier
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Correct Answer: Rachel Carson Rachel Carson authored the influential book 'Silent Spring' (1962), which highlighted the ecological dangers of pesticides like DDT. The book significantly boosted the environmental movement.
14. Growing mustard with cabbage as a trap crop is used to attract which insect?
Diamond Back moth
Cabbage butterfly
Leaf Webber
Cabbage semilooper
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Correct Answer: Diamond Back moth Mustard serves as an effective trap crop for the Diamondback Moth (Plutella xylostella) in cabbage fields. The pest is preferentially attracted to mustard, reducing infestation on the main crop.
15. Raking the soil on the side of trees would destroy large number of over wintering pupae of which insect in mango orchard?
Capsule borer
Bark eating caterpillar
Fruit fly
Termite
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Correct Answer: Fruit fly Mango fruit flies (Bactrocera spp.) pupate in the soil beneath the trees. Raking or disturbing the soil exposes these pupae, destroying them and reducing the next generation's population.
16. Who gave Phases Theory of Locust?
Uvarov
Prasad
Karl Von Frisch
Rev. Fr. Newton
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Correct Answer: Uvarov Sir Boris Uvarov formulated the 'phase theory' explaining locust polymorphism. He showed locusts shift between solitary and gregarious phases based on population density.
17. The species of Eri silkworm is -
Bombyx mori
Philosamia ricini
Antheraea paphia
Antheraea ricini
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Correct Answer: Philosamia ricini The Eri silkworm, which produces eri silk, is scientifically known as Philosamia ricini (or Samia cynthia ricini). Bombyx mori is the mulberry silkworm.
18. Pest population level 'at which management action should be taken -
Insect equivalent
ETL
EIL
Gain threshold
âś“
Correct Answer: ETL The Economic Threshold Level (ETL) is the pest density that triggers control actions. Action at ETL aims to prevent the population from reaching the Economic Injury Level (EIL).
19. First plant parasite nematode discovered was -
Meloidogyne
Heterodera
Anguina
Globodera
âś“
Correct Answer: Anguina Anguina tritici, the wheat seed gall nematode, was the first plant-parasitic nematode discovered and described by Needham in 1743. It causes galls in wheat kernels.
20. 'Grapevine fan leaf disease caused by virus is transmitted by -
Xiphinema
Trichodorus
Paratrichodorus
Ralstonia
âś“
Correct Answer: Xiphinema Grapevine Fanleaf Virus (GFLV) is transmitted specifically by the dagger nematode, Xiphinema index. This nematode acts as a vector, spreading the virus between grapevine plants.
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Thank you soo much please provide this quizes on regular basis by providing early syllabus So, we can study at attempt like a mock tests and also provide the questions related to other competitive exams like UPSC..please
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Thank you soo much please provide this quizes on regular basis by providing early syllabus So, we can study at attempt like a mock tests and also provide the questions related to other competitive exams like UPSC..please