50NL Blocking bet OK?

[SparkMan]

iPoker No-Limit Texas Hold'em (NL50), $0.50 BB (8 handed) SilverKitty Hand History converter by www.pokeronline.com.ua

SB ($74.67)
Hero ($45)
UTG+2 ($48.5)
MP1 ($13.15)
MP2 ($41.9)
MP3 ($49.78)
CO ($65.5)
Button ($45.4)

SB: Post SB $0.25
Hero: Post BB $0.50

Preflop:
Hero is BB with Q[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img]
<font color="#666666">2 folds</font>
MP2 Call $0.5
<font color="#666666">3 folds</font>
SB Call $0.25
Hero Raise $2
MP2 Call $2
<font color="#666666">1 folds</font>

Flop:($5.5) T[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img]<font color="#0030DD">(2 players)</font>
Hero Bet $4
MP2 Call $4

Turn:($13.5) K[img]/images/graemlins/spade.gif[/img]<font color="#0030DD">(2 players)</font>
Hero Check
MP2 Check

River:($13.5) 6[img]/images/graemlins/diamond.gif[/img]<font color="#0030DD">(2 players)</font>
Hero Bet $5

Turn card is ugly, but villian checks, and I have no stats on villian. I'm not ready to give up yet but is a blocking bet in order here? I bet $5 but that might be a bit much.
I want villian to call with a Ten or worse Queen and save money vs a King. I can't see checking to induce a bluff. Villian should have at least a pair after turned king.