Chilo tumidicostalis
Chilo tumidicostalis
Chilo tumidicostalis
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Table 1 Width of head capsule of <strong>Chilo</strong> <strong>tumidicostalis</strong> (Hampson) in successive five<br />
instars (n = 30)<br />
Larval Width of head capsule (mm) Head capsule Calculated<br />
instar Mean±S.D. range growth ratio width of head<br />
capsule (mm)<br />
Instar I 0.3527±0.0123 0.34-0.36 0.3527 0<br />
1.0814<br />
Instar II 0.381±0.0078 0.36-0.38 0.5458 0.0490<br />
2.3424<br />
Instar III 0.8934±0.0659 0.79-1.02 0.8445 0.0028<br />
1.5522<br />
Instar IV 1.3867±0.2145 1.25-1.40 1.3069 0.0049<br />
1.2144<br />
Instar V 1.6384±0.1125 1.28-1.77 2.1187 0.1089<br />
Mean geometric progression ratio = 1.5476 Pooled<br />
2<br />
x<br />
2<br />
x = 0.1661<br />
17
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