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Identify insect pests part i

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Identify insect pests part i

  1. 1. Sylhet Agricultural University Department of EntomologyChandra Kanta Dash (Assistant Professor) 1. Silverfish/Lepismatidae/ Thysanura Cerci Median caudal filament Fig. Silverfish  Body covered with silvary scales.  Last abdominal segment bears a pair of cerci and a median caudal filament. Antenna long and filiform. Filiform antenna
  2. 2. Sylhet Agricultural University Department of EntomologyChandra Kanta Dash (Assistant Professor) 2. Dragonfly/Aeshnidae/ Odonata Eye contagious Fig. Dragonfly  Body stout and robust. Wings dissimilar, i.e. the base of the hind wings are broader than the base of the fore wings.  Wings held horizontally when at rest.  Compound eyes larger and contagious. Stigma present at apex of the each wing. Base of the hind wing broader than the base of the front wing Wings dissimilar Stigma present
  3. 3. Sylhet Agricultural University Department of EntomologyChandra Kanta Dash (Assistant Professor) 3. Damselfly/Coenagrionidae/ Odonata  Body slender.  Both wings similar.  Compound eyes larger but separated.  Stigma present on each wing. Eyes separate Fig. Damselfly Both wings similar Body slender Stigma present
  4. 4. Sylhet Agricultural University Department of EntomologyChandra Kanta Dash (Assistant Professor) 4. Short horned grasshopper/Acrididae/ Orthoptera Hind leg jumping type Fig. Short horned grasshopper  Body stout and robust. Wings dissimilar, i.e. the base of the hind wings are broader than the base of the fore wings.  Wings held horizontally when at rest.  Compound eyes larger and contagious. Stigma present at apex of the each wing. Wings: tegmina Filliform antenna
  5. 5. Sylhet Agricultural University Department of EntomologyChandra Kanta Dash (Assistant Professor) 5. Long horned grasshopper/Tettigoniidae/ Orthoptera Fig. Long horned grasshopper Antenna longer than body and and filiform. Ovipositor sharp, flattened and blade like structure. Hind leg jumping type and tarsi 4 segmented. Ovipositor blade like Antenna longer Than the body Wings tegmina
  6. 6. Sylhet Agricultural University Department of EntomologyChandra Kanta Dash (Assistant Professor) 6. Field Cricket/Gryllidae/ Orthoptera Fig. Field cricket Body large dull, usually pale, brownish or black in color. Ovipositor long needle like. A pair of unsegmented cerci present. Fore wings modified into tegmina. Hind leg jumping type. Ovipositor needle like Dull, pale colored body Wings tegmina
  7. 7. Sylhet Agricultural University Department of EntomologyChandra Kanta Dash (Assistant Professor) 7. Mole Cricket/Gryllotalpidae/ Orthoptera Fig. Mole cricket Robust body. Ovipositor short and vestigial. Front leg greatly enlarged and modified for digging. A pair of long unsegmented cerci present. Fore wings modified into tegmina Ovipositor vestigial Wings tegmina Front leg digging type Robust body
  8. 8. Sylhet Agricultural University Department of EntomologyChandra Kanta Dash (Assistant Professor) 8. Earwig/Forficulidae/ Dermaptera Cerci modified into Forcep like structure Fig. Earwig Cerci modified into forcep like structure. Fore wings short, modified into tegmina and hind wings semi circular and folded beneath the tegmina. Antenna short and filiform. Tarsi 3 segmented. Tegmina short Filliform antenna
  9. 9. Sylhet Agricultural University Department of EntomologyChandra Kanta Dash (Assistant Professor) 9. Cockroach/Blattidae/ Dictyoptera Body oval Fig. Cockroach Body oval, flattened, head partly or completely covered by the shield like pronotum. Antenna longer than the body filiform. Cursorial or walking and running type leg. Fore wings modified into tegmina, hind wings membranous. Mandibulate mouthparts, chewing type Shield shaped pronotum Filliform antenna
  10. 10. Sylhet Agricultural University Department of EntomologyChandra Kanta Dash (Assistant Professor) 10. Preying mantid/Mantidae/ Dictyoptera Pro thorax greatly elongated Fig. Preying mantid Head movable Prothorax greatly elongated. Fore leg raptorial type adapted for grasping prey. Fore leg raptorial Or grasping type Head movable
  11. 11. Sylhet Agricultural University Department of EntomologyChandra Kanta Dash (Assistant Professor) 11. Termite/Termitidae/ Isoptera Broad junction between Thorax and abodomen Fig. Termite Broad junction between thorax and abdomen Antenna moniliform, multisegmented. Workers with larger head and prominent mandible. Winged or wingless; winged formed with two pair of wings similar in size and shape, held flat over the adomen at rest. Mouthparts chewing type. Antenna moniliform Prominent mandible in worker Wings similar when present

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