Within a few days, an infected larva stops feeding, becomes sluggish, and discolors as its internal organs fill with virus. With the news that codling moth has developed resistance to the granulovirus in organic apple orchards, U.S. orchardists who use the virus are encouraged to use resistance management strategies to keep the virus effective. After growers in Europe reported that the virus was losing its effectiveness against the pest, German insect virologists and geneticists surveyed 13 orchards in southern Germany and tested samples. The scientists reported in a recent issue of Science magazine that the codling moths collected from the […]