HR CHEM STUDY

3. Major Insects of Crops and Storage

рдЗрд╕ рдкреЗрдЬ рдкрд░ рдЖрдкрдХреЛ 3. Major Insects of Crops and Storage рдХреЗ рд╕рднреА рдорд╣рддреНрд╡рдкреВрд░реНрдг рдмрд╣реБрд╡рд┐рдХрд▓реНрдкреАрдп рдкреНрд░рд╢реНрди (MCQ), рдкрд░реАрдХреНрд╖рд╛ рдЙрдкрдпреЛрдЧреА рдиреЛрдЯреНрд╕ рдФрд░ рдСрдирд▓рд╛рдЗрди рдХреНрд╡рд┐рдЬрд╝ рдорд┐рд▓реЗрдВрдЧреЗред рдЕрдкрдиреЗ рдЬреНрдЮрд╛рди рдХрд╛ рдкрд░реАрдХреНрд╖рдг рдХрд░рдиреЗ рдФрд░ рдмреЛрд░реНрдб/рдкреНрд░рддрд┐рдпреЛрдЧреА рдкрд░реАрдХреНрд╖рд╛ рдореЗрдВ рд╢рдд-рдкреНрд░рддрд┐рд╢рдд рдЕрдВрдХ рдкреНрд░рд╛рдкреНрдд рдХрд░рдиреЗ рдХреЗ рд▓рд┐рдП рдиреАрдЪреЗ рджрд┐рдП рдЧрдП рдореЙрдХ рдЯреЗрд╕реНрдЯ рдореЗрдВ рдЕрд╡рд╢реНрдп рднрд╛рдЧ рд▓реЗрдВред

Take Class 12 Agriculture Chapter 3 MCQs and online test. Practice major crop insects VVI questions. 3-Level Challenge: Score 70% to unlock the next level!

ЁЯСЙ рдЕрдзреНрдпрд╛рдп рдХрд╛ рд╕рд╛рд░рд╛рдВрд╢ (Summary)

Dear students, have you ever wondered how a hardworking farmer spends the entire year tirelessly cultivating a crop, only to sometimes see the entire lush green field destroyed overnight due to a sudden infestation of pests? Or perhaps you have personally noticed that grains stored safely in sacks at home suddenly get infested with tiny weevils, rendering the entire batch completely unfit for human consumption? This highly significant chapter of Agriculture Biology, titled 'Major Insects of Crops and Storage', explains these severe agricultural problems to us in great detail. In this comprehensive chapter, we will extensively study all those destructive insects that cause massive damage not only to standing green crops in the fields but also to the ripe, harvested grains kept safely in storage facilities. Let us understand this serious issue with a very practical real-life example. All of you must have seen tiny black insects inside the wheat, rice, or chickpea containers in your home's kitchen, especially during the humid rainy season. These specific insects are known as storage pests. Similarly, when we travel towards agricultural fields during the Kharif season, we often observe that crops like pearl millet (bajra) or groundnut are severely attacked by terrifying insects like the 'White grub' or the 'Red hairy caterpillar'. These pests rapidly consume the delicate roots and tender green leaves, completely destroying the entire crop structure in just a matter of days. In this chapter, we will deeply study the life cycles and the resulting economic damages caused by major harmful insects of both Kharif and Rabi seasons, such as the White grub, Locust, Gram pod borer, Aphid, Ber fruit fly, and the Pomegranate butterfly. For securing top ranks in the upcoming NCERT and RBSE board exams in 2027, this particular chapter is absolutely critical and highly scoring. Your final board exams will frequently feature objective questions regarding the scientific names of these insects, their detailed physical structures, their complex life cycles involving 4 distinct stages (egg, larva, pupa, and adult), and the various chemical and biological methods used to protect crops from them. You must pay special and focused attention to dangerous storage pests like Termites and the Khapra beetle, because these tiny creatures alone cause a massive financial loss of hundreds of crores of rupees to the Indian agricultural system every single year. In agricultural science, thoroughly understanding the classification of insects is extremely essential. Some insects severely damage the crops, and we classify them as enemy pests, whereas there are also several friendly insects that naturally prey on these harmful pests, indirectly helping the farmers. As an aware student, you must know exactly how to identify and differentiate between these 2 categories of insects accurately. Keeping all the crucial points of this chapter and the latest examination patterns in mind, we have meticulously compiled a superb collection of multiple-choice questions for you. When you regularly attempt our online test, you will get a perfect simulation of the types of questions that appear in the final board exams. This online quiz will not only enhance your subject retention capacity but will also magically improve your time management skills inside the examination hall. Read every single question very carefully and then select the right option. Your grand success ultimately depends entirely on your continuous and dedicated practice. Let us dive deep into understanding these insects today. Feature: This is a unique 3-Level based quiz. To unlock the next levels (Level 2 and 3), students must score at least 70% marks in the current level, which makes their board exam preparation 100% stronger.

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рдЕрдзреНрдпрд╛рдп рдХреЗ рд╕рднреА рдкреНрд░рд╢реНрди (Revision Notes)

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  1. The branch of zoology that deals with the study of insects is:
    A) Ornithology  |  B) Entomology  |  C) Cytology  |  D) Soil Science
  2. Insects belong to which Phylum?
    A) Mollusca  |  B) Arthropoda  |  C) Annelida  |  D) Protozoa
  3. The body of an insect is divided into how many parts?
    A) Two  |  B) Three (Head, Thorax, Abdomen)  |  C) Four  |  D) One
  4. What is the scientific name of Katra (Red hairy caterpillar)?
    A) Amsacta moorei  |  B) Schistocerca gregaria  |  C) Holotrichia consanguinea  |  D) Odontotermes obesus
  5. At what time do adult beetles of White Grub emerge from the soil at night?
    A) 12 PM  |  B) 7:30 to 8:30 PM  |  C) 4 AM  |  D) 12 AM
  6. What is the scientific name of Termite?
    A) Amsacta moorei  |  B) Odontotermes obesus  |  C) Trogoderma granarium  |  D) None
  7. The scientific name of the Desert Locust is:
    A) Schistocerca gregaria  |  B) Holotrichia  |  C) Amsacta moorei  |  D) Carpomyia vesuviana
  8. How many pairs of legs are found on the thorax of an insect?
    A) Two pairs  |  B) Three pairs (Hexapoda)  |  C) Four pairs  |  D) One pair
  9. Khapra beetle is primarily a pest of:
    A) Standing crops  |  B) Stored grains  |  C) Fruits  |  D) Roots
  10. What is the scientific name of the Ber fruit fly?
    A) Amsacta moorei  |  B) Carpomyia vesuviana  |  C) Trogoderma  |  D) None
  11. In a termite colony, who is primarily responsible for 'laying eggs'?
    A) Soldier  |  B) Worker  |  C) Queen  |  D) King
  12. What is the exoskeleton of insects made of?
    A) Calcium  |  B) Chitin  |  C) Sugar  |  D) Protein
  13. For safe storage, moisture in food grains should be less than:
    A) 20%  |  B) 10-12%  |  C) 50%  |  D) 30%
  14. The larva of White Grub is of which shape?
    A) S-shape  |  B) C-shape  |  C) L-shape  |  D) Straight
  15. Which stage of the Katra pest damages the crop?
    A) Adult  |  B) Caterpillar (Larva)  |  C) Egg  |  D) Pupa
  16. How do insects breathe?
    A) Lungs  |  B) Tracheae  |  C) Skin  |  D) Gills
  17. What is the scientific name of the Khapra beetle?
    A) Trogoderma granarium  |  B) Amsacta moorei  |  C) Schistocerca  |  D) None
  18. Where does the Locust prefer to lay its eggs?
    A) On tree leaves  |  B) In sandy moist soil  |  C) In water  |  D) On house walls
  19. In which season's crop does Katra primarily cause damage?
    A) Rabi  |  B) Kharif  |  C) Zaid  |  D) Always
  20. Which are the excretory organs in insects?
    A) Kidneys  |  B) Malpighian tubules  |  C) Heart  |  D) Liver
  21. Adult beetles of White Grub prefer eating the leaves of which trees?
    A) Neem and Khejri  |  B) Banyan  |  C) Mango  |  D) Papaya
  22. How is the Katra caterpillar identified?
    A) It is smooth  |  B) It has dense hair (Hairy caterpillar)  |  C) It has wings  |  D) None
  23. Which chemical is applied with irrigation for termite control?
    A) Urea  |  B) Chlorpyriphos  |  C) Gypsum  |  D) Salt
  24. Which stage of the Khapra beetle causes damage?
    A) Only Grub (Larva)  |  B) Only Adult  |  C) Both  |  D) Egg
  25. How much distance can a Locust Swarm cover in a day?
    A) 1 km  |  B) 100 km or more  |  C) 5 km  |  D) 10 km
  26. The Grub (Larva) of White Grub primarily eats which part of the plant?
    A) Leaf  |  B) Root  |  C) Flower  |  D) Fruit
  27. The Maggot (Larva) of Ber fruit fly damages by eating which part?
    A) Skin  |  B) Pulp  |  C) Seed  |  D) None
  28. What should farmers do upon receiving information about a locust swarm?
    A) Sit quiet  |  B) Make noise and create smoke  |  C) Empty the field  |  D) None
  29. Which group is most numerous in a termite colony and also causes damage?
    A) Queen  |  B) King  |  C) Workers  |  D) Soldiers
  30. When do adult Katra moths emerge after the first monsoon rain?
    A) Afternoon  |  B) Evening  |  C) Night  |  D) Morning
  31. How many segments is an insect's body actually made of?
    A) 10  |  B) 20  |  C) 30  |  D) 5
  32. Up to what part of a grain bag does the Khapra beetle cause damage?
    A) Bottom surface  |  B) Top 15-20 cm only  |  C) Entire bag  |  D) Middle
  33. Where does the Katra pupal stage develop?
    A) On leaves  |  B) In soil at 15-20 cm depth  |  C) In water  |  D) In air
  34. Chemical used for 'seed treatment' to control White Grub is:
    A) Chlorpyriphos or Imidacloprid  |  B) Urea  |  C) Copper sulfate  |  D) None
  35. What function do the Antennae on an insect's head perform?
    A) Seeing  |  B) Sensory (Sensing)  |  C) Flying  |  D) Grasping
  36. Approximately how many eggs does a single female locust lay in its life?
    A) 10  |  B) 500-600  |  C) 5000  |  D) Zero
  37. Metamorphosis in insects means:
    A) Death  |  B) Passing through different stages (Egg, Larva, Pupa)  |  C) Eating  |  D) Sleeping
  38. What is the scientific name of the Pomegranate butterfly?
    A) Virachola isocrates  |  B) Amsacta moorei  |  C) Schistocerca  |  D) None
  39. What is the main function of the 'Soldier' caste in termites?
    A) Laying eggs  |  B) Bringing food  |  C) Protecting colony from enemies  |  D) None
  40. What are the three parts of the insect Thorax?
    A) Pro, Meso and Metathorax  |  B) Head and Abdomen  |  C) Wings and Legs  |  D) None
  41. The transformation between 'Solitary' and 'Gregarious' phases in Locusts is called:
    A) Breeding  |  B) Phase Theory  |  C) Mutation  |  D) Adaptation
  42. Adult beetles of White Grub are primarily active in which months?
    A) Dec-Jan  |  B) June-July (with Monsoon)  |  C) March-April  |  D) October
  43. Chemical used for 'Fumigation' in stores to control Khapra beetle is:
    A) Aluminum Phosphide (Celphos)  |  B) Urea  |  C) Salt  |  D) Water
  44. How long does it take for caterpillars to emerge from Katra eggs?
    A) 1 month  |  B) 2-3 days  |  C) 10 days  |  D) Zero
  45. Approximately how many eggs can a Queen termite lay in a day?
    A) 100  |  B) 30,000  |  C) 1,000  |  D) 5,000
  46. What are the 'Compound eyes' of insects made of?
    A) Lenses  |  B) Ommatidia  |  C) Glass  |  D) None
  47. Why is a 'Light Trap' used to prevent Katra?
    A) For lighting  |  B) To attract and kill adult moths  |  C) To increase temp  |  D) None
  48. Where do adult White Grub beetles go in the morning?
    A) To the trees  |  B) Back into the ground to hide  |  C) In the air  |  D) In the water
  49. How long can Khapra grubs survive without food in unfavorable conditions?
    A) 1 day  |  B) 4-5 years (Dormancy)  |  C) 1 month  |  D) 1 week
  50. Which stage of the Locust is called 'Nymph'?
    A) Adult  |  B) Wingless young stage  |  C) Egg  |  D) Pupa
  51. Termites are capable of digesting which substance?
    A) Sugar  |  B) Cellulose  |  C) Fat  |  D) Vitamin
  52. What do the last 11 segments of the insect body form?
    A) Head  |  B) Thorax  |  C) Abdomen  |  D) Wings
  53. What is the Order of the Katra pest?
    A) Lepidoptera  |  B) Coleoptera  |  C) Isoptera  |  D) Diptera
  54. What is the Order of White Grub?
    A) Lepidoptera  |  B) Coleoptera  |  C) Isoptera  |  D) Diptera
  55. What is the Order of Termites?
    A) Isoptera  |  B) Coleoptera  |  C) Lepidoptera  |  D) None
  56. Where is the Pupa stage of the Ber fruit fly completed?
    A) Inside the fruit  |  B) In soil at 5-10 cm depth  |  C) On leaves  |  D) In air
  57. At what temperature is the Khapra beetle most active?
    A) 10┬░C  |  B) 32┬░C - 44┬░C  |  C) 0┬░C  |  D) Above 50┬░C
  58. Approximately how many eggs are in one 'Egg pod' of the Desert Locust?
    A) 10  |  B) 50-100  |  C) 500  |  D) 1,000
  59. In which pest are 'Biting and Chewing' mouthparts found?
    A) Butterfly  |  B) Locust and Katra  |  C) Mosquito  |  D) Fly
  60. What is the structure of an insect's heart?
    A) Four chambered  |  B) Tubular and multi-chambered  |  C) Two chambered  |  D) None
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