New Zealand’s new ball bowlers Trent Boult and Tim Southee produced double-wicket maidens apiece to derail the Sri Lankan batting and have them struggling at 144 for six wickets by the close on another rain-hit day to the second and final cricket Test being played at the P Sara Oval on Thursday.The start of the second day itself was delayed by 45 minutes with play not getting underway till 10.30 am under leaden skies with the threat of rain round the corner.