Newworld screwworm Update The detection of New World screwworm (NWS) in Texas on Wednesday has been volatile for the cattle markets. The confirmation came on Wednesday evening, and the futures market opened sharply lower on Thursday. Market participants cited unknowns about cattle supplies and movement restrictions. August feeder cattle fell to their lowest values since mid-April, but then recovered and more than reversed their previous losses.  The NWS news comes amid several other shocks, including the smallest cattle herd in 75 years and persistent drought conditions. While there has been some recent relief, drought remains significantly higher than it was a year ago. More than half of the cattle inventory is still in drought affect...