Table 1. The effect of injecting EcR dsRNAs on chitin content of different tissues in S. exigua larvae.

Tissues	Group	Mean (µg chitin/insect) ± SE
		12 hr	36 hr
Midgut/peritrophic membrane	dsGFP	5.7219±0.7580 a	0.7094±0.0665 b
	dsEcRcom	5.6726±0.4949 a	1.9533±0.3530 a
Epidermis	dsGFP	39.7933±2.1478 a	33.1551±1.8894 a
	dsEcRcom	39.6455±2.9804 a	29.1587±1.5632 b

Different letters between treatments of dsGFP and dsEcRcom in the same column indicate significant difference in the chitin contents in either the midgut or the epidermis (p<0.05, T test, n = 8).