Skip to main content
Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 2 Estimated head capsule width of each larval instar

From: Continuous nondestructive monitoring of larval feeding activity and development of the bamboo powderpost beetle Dinoderus minutus using acoustic emission

Instar

7-instar type

8-instar type

Head capsule width (mm)

Growth ratio r

Head capsule width (mm)

Growth ratio r

1

0.119*

1.35**

0.119*

1.29**

2

0.160

0.153

3

0.215

0.198

4

0.290

0.255

5

0.390

0.329

6

0.524

0.424

7

0.706*

0.547

8

–

0.706*

  1. *Mean of 20 measured values
  2. **Calculated from measured head capsule widths of the first and final instars (*) based on Dyar’s rule
Back to article page