1
ICAR JRF Entomology 29 Jun 2024Shift 1
MCQ (Single Correct) +4 −1

The insects which infests cotton are

(A) . Lipaphis erysimi
(B) . Aphis gossypii
(C) . Phenacoccus solenopsis
(D) . Aphis craccivora

Choose the correct answer from the options given below:

EXPLANATION Pests of Commercial & Fiber Crops & Managemen
  • Major Sucking Pests of Cotton:
  • Target Pests of Cotton:
  • Aphis gossypii: The cotton aphid (melon aphid), a major pest causing crinkling and leaf curling and secreting honeydew.
  • Phenacoccus solenopsis: The invasive cotton mealybug, causing devastating economic losses to Bt cotton across India.
  • Other Aphids Listed:
  • (A) Lipaphis erysimi: Mustard aphid, infests cruciferous crops.
  • (D) Aphis craccivora: Cowpea aphid, infests pulses and legumes.
  • Conclusion: Insects infesting cotton are (B) and (C) only (Option 2).

Correct option: (2) (B) and (C) only.

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report
Want to practice this paper in exam conditions? क्या आप परीक्षा जैसे माहौल में अभ्यास करना चाहते हैं? Test yourself in 5-question batch format with timer and hidden answers. 5-प्रश्नों के बैच फॉर्मैट, टाइमर और छिपे उत्तरों के साथ खुद को परखें।
Start Practice Mode → प्रैक्टिस टेस्ट मोड शुरू करें →

Entomology Subjects

Browse all chapters by subject

General Agriculture

6 Topics
Agronomy, Tillage & Field Crop Production Cell Biology, Plant Physiology & Biochemistry Agricultural Entomology, Nematology & Crop Pr Agricultural Meteorology & Climate Science Soil Science, Plant Nutrition & Reclamation Crop Genetics, Plant Breeding & IPR

Systematics

11 Topics
Biology, Damage, & Identification of Stored G Silkworm Pests, Parasitoids, & Cocoon Predato Grain Storage Structures, Moisture, Preventat Fungal Classification, Nomenclature & Taxonom Economic Mycology, Edible Mushrooms & Mycorrh Pathogenesis Mechanisms, Enzymes, Toxins & Vi Fungal Morphology, Ultrastructure, Spore Biol Biological Control, Bioagents , Host Resistan Protozoan & Fungal Diseases & Disinfection Sprayers, Dusters, Nozzles, Application Volum Statistical Distributions, Experimental Desig

Morphology

9 Topics
Population Dynamics, Life Tables, & Ecologica IPM Principles, Economic Decision Levels, & E Environmental Factors, Microclimate, & Insect Fastidious Vascular Prokaryotes, Phytoplasmas Bacterial Morphology, Ultrastructure & Classi Legislative Quarantine, SPS/WTO, Seed Certifi Soil & Plant Sampling, Extraction Methods, Si Silkworm Genetics, Races, Voltinism, & Sex-Li Agroecosystem Ecology, Sampling Methods, & Pe

Embryology, Internal Anatomy & Physiology

10 Topics
Vector Biology, Transmission Mechanisms, & In Milestones, Historical Nematologists, Cobb's Mass Production, Commercialization, & Transge Principles of Biological Control, Parasitoids Fungal Diseases of Horticultural, Plantation, Mechanisms of Host Plant Resistance to Insect Morphology, Mouthparts, Integument, & Molting Genetics, Biotypes, & Transgenic Insect-Resis Biological Control of Weeds Phytotoxemia, Toxicogenic Insects, Galls, & V

Ecology

9 Topics
Nematode Cuticle, Integument, Hypodermis, Sen Pests of Vegetable Crops & Management Transmission Biology, Insect Vectors & Virus- Pollinators, Scavengers, Medicinal, Edible, Silkworm Rearing Technology, Cocoon Productio Viroids, Satellite Agents & Viral Purificatio Nematode Taxonomy, Systematics, Nomenclature Pests of Plantation, Spice, Ornamental, Prote Insect Origin, Evolution, & Phylogeny of Arth

Biological Control

13 Topics
Pests of Cereals & Millets & Management Excretory, Endocrine, Reproductive Physiology Semiochemicals, Pheromones, & Behavioral Mani Polyphagous, Soil, Invasive, Vertebrate, & Mo Nervous, Sensory Systems, & Sense Organs Circulatory & Respiratory Systems Bacterial Diseases of Field, Fruit & Vegetabl Viral, Viroid & Phytoplasmal Diseases of Majo Parasitic Adaptations, Feeding Habits & Secre Pests of Commercial & Fiber Crops & Managemen Active Digestive System, Peritrophic Membrane, & Ins Nanotechnology, RNA Interference, & Drone Reg Apiculture, Bee Species, Social Organization,

Chemical Control & Toxicology

9 Topics
Mulberry Botany, Varieties, Moriculture Agron Thorax Structure, Leg Modifications, & Wing V Infection Process, Survival, Inoculum Dynamic Nematode Parasites of Cereals, Millets, Pulse Insect Integument, Cuticle, & Body Sclerotiza Mulberry Diseases, Pests, & Integrated Moricu Abdominal Anatomy, Pregenital Appendages, & E Insecticides Act, CIB&RC Regulations, Label C Lac Insect Biology, Host Trees, Cultivation,
Official PYQ Papers

Previous Year Papers of Entomology

Practice official shift-wise question papers with answer keys and detailed explanations on the actual exam pattern.

1
Total Available Previous Papers

Choose Exam

Exam Directory

Browse official Previous papers and mock tests

10 Major Agriculture Exams Available

RPSC Agriculture Exams

5 Exams
Food Safety Officer Assistant Agriculture Officer Agriculture Officer RPSC Agriculture Research Officer RPSC AARO

RSSB Agriculture Exams

1 Exam
RSSB Agriculture Supervisor

National & PG Entrances

4 Exams
ICAR AIEEA PG CUET UG Rajasthan Agriculture Pre-PG ICAR JRF/SRF