Sweetpotato ( Ipomoea batatas ) production in the northern United States is limited due to perceived barriers of a short growing season and relatively cool summer temperatures, yet recent studies have shown yield regions can be greater than national average when sweetpotatoes are grown with plastic mulch. A study was conducted northwest Washington evaluate productivity ‘Covington’ sweetpotato p...

Wireworms are a soil-inhabiting crop pest. Larvae attack many crops, particularly potatoes, and even low populations can cause an economic level of damage. In the UK, high wireworm populations are traditionally associated with long-term grass leys (Parker and Howard, 2001). In the case of organic production, potato crops frequently follow a long-term fertility-building grass ley. Organically gr...

abdomen, 3, 269 genital segments, 270–271 musculature, 272–273 number of segments, 270 structure of segments, 270–272 abdominal appendages, 273–280 cerci, 276–277 evolution of, 273 gills, 277–278 larval locomotion and attachment structures, 141–142 modified prolegs, 280 primitive hexapods, 274–275 scoli, 280 secondary sexual structures, 278–279 secretory structures, 278 sensory structures, 276–...