Table 2.

Analysis of cold tolerance of Dermacentor silvarum treated with RNAi

Gene	Mortality rate (mean ± SD)
	Blank control	PBS	GFP	dsRNA
HSP90	40% ± 11%	45% ± 7%	60% ± 6%	70% ± 10%
HSP70	47.5% ± 7%	52.5% ± 8%	65% ± 14%	(80% ± 10%)*
Tubulin	37.5% ± 13%	47.5% ± 3%	57.5% ± 7%	(70% ± 10%)*

PBS Phosphate-buffered saline, GFP green fluorescent protein

^*P < 0.05 indicates a significant difference