EFFECT OF CORN-COTTON ROTATIONS ON RENIFORM NEMATODE POPULATIONS AND CROP YIELD
作者： H. A. Bruns , S. R. Stetina , W. T. Pettigrew , L. D. Young
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摘要: Stetina, S. R., L. D. Young, W. T. Pettigrew, and H. A. Bruns. 2007. Effect of Corn-Cotton Rotations on Reniform Nematode Populations Crop Yield. Nematropica 37:237-248. Corn (Zea mays) as a rotation crop with cotton (Gossypium hirsutum) was evaluated in field study conducted from 2000 through 2003 at Stoneville, MS to determine its effect reniform nematode (Rotylenchulus reniformis) population density. The experimental design randomized block splitplot eight replications. main plots were rotations (continuous cotton, continuous corn, corn-cotton-corn-cotton, or cotton-corn-corn-cotton), six-row subplots one four genotypes either corn cotton. populations the center two rows each subplot determined planting, midseason, harvest. Cotton yields samples taken all inner rows, respectively. In planted previous season, planting exceeded damaging levels for Mississippi, regardless sequence. remained below throughout season following seasons corn. However, when followed rebounded by end season. lint yield cotton-corn-corn-cotton 194 kg/ha greater than 2003. At this study, least consecutive years appears be necessary achieve suppression sufficient increase yield. not affected or, year, improved grown genotype did affect density, there no x interactions respect density
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