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p>A study on biology, morphometrics and geometrical progression of Thysanoplusia orichalcea was conducted on Solanum tuberosum under laboratory conditions. Different stages viz., egg, larva, pupa and adult of T. orichalcea were observed for their duration and morphometric measurements. The pest depicted five larval instars and moultedfour times dur...
Contexts in source publication
Context 1
... third instar larva displayed two lateral lines running along the plural region. The fourth and fifth larval instars flaunted extra blackish mid dorsal line (Fig 2). From third instar onwards, larvae starts feeding voraciously engulfing the entire leaf including mid rib and vein. ...
Context 2
... ratio (1.63) with the observed width of head capsule of first larval instar provides the expected width of head capsule of second instar larva which when multiplied again with Dyar's ratio gives expected width of head capsule of third larval instar and so on. ing and becomes sluggish by contracting its body and appendages (Fig 2). This phase lasted for 1.0-2.0 ...
Context 3
... pupa is obtect type. Prior to pupation, a mature full grown larva starts to spin white silken cocoon around the body and protects it externally by leaf fold (Fig 2).The male pupa was found slightly smaller than female pupa. The length and breadth of male pupa varies between 17.50-19.00 ...
Context 4
... adult moth comes out of puparium by puncturing an escape hole with the aid of some secretions. The forewing of adult moth is olive brown in colour with large conspicuous L shaped metallic golden patch (Fig 2). The male and female moths' possess pectinate and filliform type of antennae respectively. ...
