Types of Insects eggs and Pupae slideshare
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This document describes different types of insect eggs and pupae. It discusses eggs that are laid singly, such as sculpted, elongated, rounded, or floating eggs, as well as eggs laid in groups through pedicellate stalks, barrels, oothecae, pods, cases, or masses. The document also examines three main types of pupae: obtect pupae where appendages are glued down; exarate pupae where appendages are free; and coarctate pupae that form within the hardened last larval skin.
Types of Insects eggs and Pupae slideshare
- 1. Types of Insects eggs & Pupae By:Muhammmad Awais Farzand (96) Replica To:Dr,HaďŹz Azhar Hussain Institute of agricultural sciences the university of Punjab Lahore
- 2. Types of Insects egg Single Laid Eggs â Sculptured egg â Elongated egg â Rounded egg â Nit â Egg with ďŹoat Eggs laid in groups â Pedicellate eggs â Barrel shaped eggs â Ootheca â Egg pod â Egg case â Egg mass
- 3. A)Single Laid Eggs 1)Sculptured Eggs: Chorion with reticulate markings and ridges e.g. Castor butterďŹy. 2) Elongate egg : Eggs are cigar shaped. e.g. Sorghum shoot ďŹy. 3) Rounded egg: Eggs are either spherical or globular. e.g. Citrus butterďŹy
- 4. 4)Nit â Egg of head lice is called nit. â It is cemented to the base of the hair. â There is an egg stigma at the posterior end, which assists in attachment. â At the anterior end, there is an oval lid which is lifted at time of hatching
- 5. 5)Egg with Float â Egg is boat shaped with a conspicuous ďŹoat on either side. â The lateral sides are expanded. â The expansions serve as ďŹoats. â e.g. Anopheles mosquito.
- 6. Eggs Laid in Groups 1) Pedicellate eggs : Eggs are laid in silken stalks of about 1.25mm length in one groups on plants. e.g. Green lacewing ďŹy. 2) Barrel shaped eggs : Eggs are barrel shaped. They look like miniature batteries. They are deposited in compactly arranged masses. e.g. Stink bug.
- 7. 3) Ootheca (Pl. Oothecae): â Eggs are deposited by cockroach in a brown bean like chitinous capsule. â Each ootheca consists of a double layered wrapper protecting two parallel rows of eggs â Each ootheca has 16 eggs arranged in two rows
- 8. 4)Egg Pod â Grasshoppers secrete a frothy material that encases an egg mass which is deposited in the ground. â The egg mass lacks a deďŹnite covering. â On the top of the egg, the frothy substance hardens to form a plug which prevents the drying of eggs.
- 9. 5) Case Mantids deposit their eggs on twigs in a foamy secretion called spumaline which eventually hardens to produce an egg case or ootheca. Inside the egg case, eggs are aligned in rows inside the egg chambers.
- 10. 6)Egg Mass Moths lay eggs in groups in a mass of its body hairs. Anal tuft of hairs found at the end of the abdomen is mainly used for this purpose. e.g. Rice stem borer Female silk worm moth under captivity lays eggs on egg card. Each egg mass is called a dďŹ (diseases free laying)
- 11. 7)Egg raft In Culex mosquitoes, the eggs are laid in a compact mass consisting of 200-300 eggs called egg raft in water.
- 12. Pupa It is the resting and inactive stage in all holometabolous insects. During this stage, the insect is incapable of feeding and is quiescent. During this transitional stage, the larval characters are destroyed and new adult characters are created. There are three main types of pupae.
- 13. OBTECT Various appendages of the pupa viz., antennae, legs and wings pads are glued to the body by a secretion produced during the last larval moult. Exposed surface of the appendages are more heavily sclerotised than those adjacent to body. Eg: moth pupa.
- 14. a) Chrysalis It is the naked obtect pupa of butterďŹy. It is angular and attractively coloured. The pupa is attached to the substratum by hooks present at the terminal end of the abdomen called cremaster. The middle part of the chrysalis is attached to the substratum by two strong silken threads called gridle.
- 15. b) Tumbler Pupa of mosquito is called tumbler. It is an object type of pupa. It is comma shaped with rudimentary appendages. Breathing trumpets are present in the cephalic end and anal paddles are present at the end of the abdomen. Abdomen is capable of jerky movements which are produced by the anal paddles. The pupa is very active.
- 16. 2) EXARATE Various appendages viz., antennae, legs and wing pads are not glued to the body. They are free. All oligopod larvae will turn into exarate pupae. The pupa is soft and pale. Eg: pupa of rhinocerous beetle.
- 17. 3) COARCTATE The pupal case is barrel shaped, smooth with no apparent appendages. The last larval skin is changed into a case containing the exarate pupa. The hardened dark brown pupal case is called puparium. Eg: Fly pupa.
- 18. Thank You Sir It's all from my side I am really apologize for anything else