Effect of Larval Density on Development of the Coconut Hispine Beetle, Brontispa longissima (Gestro) (Coleoptera: Chrysomelidae)

Table 2

Head width of last-instar larvae and body length of adults (mean ± SE, mm) of B. longissima reared under the density of one individual or 10 individuals.

Site	Density	Population				𝑡-value	𝑃
			ISH		PNG
Head width of last-instar larvae	1 individual	22	1.24±0.02	16	1.25±0.01	−0.51	0.6098
	10 individuals	86	1.19±0.01	88	1.20±0.01	−0.96	0.3375
	𝑡-value		−3.08		−2.67
	𝑃		0.0027		0.0089
Male adult body length	1 individual	11	8.6±0.1	8	9.1±0.2	−2.47	0.0246
	10 individuals	44	8.3±0.0	45	8.3±0.0	0.33	0.7423
	𝑡-value		−2.02		−6.44
	𝑃		0.0487		<0.0001
Female adult length	1 individual	10	9.2±0.1	8	9.3±0.1	−0.70	0.4940
	10 individuals	42	9.3±0.0	41	9.3±0.0	−0.10	0.9205
	𝑡-value		1.50		0.30
	𝑃		0.1391		0.7628