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

Table 1

Developmental periods (mean ± SE, days) of B. longissima reared under the density of one individual or 10 individuals.

Developmental stage	Density	Population				t-value	P
			ISH		PNG
Larva	1 individual	22	24.8±0.7	16	28.1±0.8	−2.85	0.0073
	10 individuals	86	20.5±0.3	88	25.8±0.8	−13.88	<0.0001
	𝑡-value		−6.83		−3.07
	𝑃		<0.0001		0.0027
Pupa	1 individual	21	5.1±0.1	16	4.9±0.1	1.42	0.1647
	10 individuals	86	4.9±0.1	86	4.8±0.1	1.20	0.2300
	𝑡-value		−1.73		−0.75
	𝑃		0.0873		0.4563