Effect of Air Humidity on Sex Ratio and Development of Ladybird Harmonia axyridis (Coleoptera: Coccinellidae)

Table 2

Developmental time (days) and adult fresh mass (mg) of Harmonia axyridis reared on two diets and in three levels of relative air humidities at 25°C and 16L : 8D photoperiod. D1 to D4, DL and DP: development time of particular larval instar, entire larval stage, and pupa, FMM: fresh mass of males, FMF: fresh mass of females. Means that do not differ significantly are marked with the same letter in each column.

Food	RH %	D1 days	D2 days	D3 days	D4 days	DL days	DP days	FMM mg	FMF mg
Acyrthosiphon	30	2.1 a	3.6 a	3.4 bc	7.5 a	15.1	5.0	18.2	20.7
Acyrthosiphon	60	2.0 b	3.3 ab	3.5 bc	6.2 b	14.1	5.0	18.3	25.1
Acyrthosiphon	90	2.0 b	3.1 b	3.1 c	6.4 ab	13.5	5.0	19.2	25.4
Ephestia	30	2.0 b	3.1 ab	3.8 ab	6.3 b	14.6	5.0	19.4	23.0
Ephestia	60	2.0 b	3.3 ab	4.0 a	6.9 ab	15.4	5.0	19.4	23.5
Ephestia	90	2.0 b	3.5 ab	3.1 c	7.3 a	14.3	5.0	14.5	21.8