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Identify insect pests part i
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Identify insect pests part i

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  • 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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