Spring Wheat Production and Associated Pests in Conventional and Diversified Cropping Systems in North Central Montana

摘要: Producers in the northern plains are diversifying and intensifying traditional wheat (Triticum aestivum L.)-based cropping systems by reducing summer fallow including legume oilseed crops. This study examined influence of diversification intensification on spring yield quality associated insects, diseases, weeds. Research was conducted during 1998 through 2000 period farm fields north central Montana. Conventional rotations included either hard red wheat–spring barley (Hordeum vulgare L.)–fallow or wheat–fallow. Diversified replacement with annual pulse crops cool-season oilseeds. Preplant soil water less diversified rotations, but residual nitrate not influenced rotation type. Insect pests beneficial arthropods were greater numbers conventional rotations. Incidence severity crown root rots similar between types, foliar leaf spot diseases for Weed densities Spring yield, tiller density, test weight had drought stress. Diversification may reduce decrease productivity, particularly when precipitation is inadequate.