Research Article

Life History of the Tamarind Weevil, Sitophilus linearis (Herbst) (Coleoptera: Curculionidae), on Tamarind Seed

Table 3

Head capsule ± (SE) measurement of larval instars of S. linearis.

InstarRange (mm)Mean of head capsule width (mm)Growth ratioStadium of instarsAccumulated days of development

I220.21–0.270.24 ± 0.00c3
II240.25–0.370.29 ± 0.01c1.2125
III220.30–0.480.39 ± 0.01b1.3427
IV700.39–0.690.56 ± 0.01a1.447–916
Mean growth ratio1.33

Means followed by different letters along the column are significantly different from each other () (Tukey’s HSD test).
Growth ratio = the mean head capsule width of a succeeding instar divided by the mean head capsule width of a preceding instar.