Agricultural insect pests in Orthoptera

Дата канвертавання25.04.2016
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Agricultural insect pests in Orthoptera

(Grass hopper, Locust, Crickets)

Usually median or large sized insects, Head hypognathous types, winged, brachypterous, or apterous. Antennae almost filiform, chewing mouthpart , Hind leg usually enlarged and modified for jumping, coxae small and some what separated, . Tarsi 3 or 4 segments rarely with or fewer than 3 segments. Forewings tegmina, narrow and straight, cerci usually short and almost unregimented. Specialized auditory and stimulatory organ developed. Prothorax enlarged metamorphosis gradual.

Key to the suborder

1--Antennae about as long as longer than body, many segmented, tympanal organs when present, on fore tibiae ------------------------------S. O.Ensifera

--- Antennae shorter, with than 30 segments, Tympanal organs when present at base of abdomen ----------------------------------------------------S. O. Caelifera


(Long Horned Insects)

Key to the super families.

1-- Tarsi 4--jointed, at least on middle and hind legs--Tittigonoidea

----Tarsi 3-jointed ------------------------------------------------Grylloidea

Superfamily: -- Grylloidea

Key to the families

--- Fore legs adapted for digging, ovipositor vestigial ---Gryllotapidae

--- Fore legs normal, ovipositor elongate --------------------Gryllidae

Fam. Gryllotalipidae.

Gryllotalpa gryllotalpa

Fam. Gryllidae

Liogryllus bimaculatus

Gryllus bimaculatus

Gryllus domesticus

Sub Order . Caelifera

(Short horned)

Represented in S .A. by one superfamil named acridoidea in which tarsi usually 3--jointed.

Key to the families

1-- With median dorsal elvated line on thepronotum,3 transsverse groove on the Pronotum ,fore wing narrow and margins straight ----------------. Acrididae.

---With out dorsal elvated line on the pronotum, 2 transverse grooves on the pronotum, fore wings with apical margin curved. ------ ---------Pyrgomorphidae .

Fam. Pyrgomorphidae.

Poekilocerus vittatus

Fam. Acrididae

Schistocerca gregaria

Anacridium aegyptium

Euprepocnemis plorans

Heteracris littoralis

Aiolopus thalassinus

Acrotylus insubricus

Sphingonotus savignyi


Daly, H.V., J.T. Doyen, P.Q. Ehrlich. (1978) Introduction to Insect Biology and Diversity. McGraw-Hill. New York.

Borror, D.J., D.M. DeLong, and C.A.Triplehorn, (1981) An Introduction to The Study of Insects. 5th ed. Saunders. Philadelphia

Pfadt, R.E., (1985) Fundamentals of Applied Entomology. 4th Ed. McMillan Publishing Company. New York.

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