Kirkpatrick T L, Sasser J N
J Nematol. 1984 Jul;16(3):323-8.
The influence o f various crop rotations and nematode inoculum levels on subsequent population densities of Meloidogyne incognita races 1 and 3 were studied in microplots. Ten different 3-year sequences o f cotton, corn, peanut, or soybean, all with cotton as the 3rd-year crop, were grown in microplots infested with each race. Cotton monoculture, two seasons o f corn, or cotton followed by corn resulted in high race 3 population densities and severe root galling on cotton the 3rd year. Peanut for 2 years preceding cotton most effectively decreased the race 3 population and root galls on cotton the 3rd year. Race 1 did not significantly influence cotton growth or yield at initial populations of up to 5,000 eggs/500 cm(3) soil. At 5,000 eggs/500 cm(3), cotton growth was suppressed by race 3 but yield was not affected.
在微型小区中研究了各种作物轮作和线虫接种水平对南方根结线虫1号和3号小种后续种群密度的影响。以棉花作为第三年作物，将十种不同的三年轮作顺序（棉花、玉米、花生或大豆）种植在感染了每个小种的微型小区中。棉花连作、两季玉米种植，或棉花后接玉米，导致第三年3号小种的种群密度很高，棉花根部严重瘿瘤化。棉花前种植两年花生最有效地降低了第三年棉花上3号小种的种群数量和根部瘿瘤。在初始种群密度高达5000个卵/500立方厘米土壤时，1号小种对棉花生长或产量没有显著影响。在5000个卵/500立方厘米时，3号小种抑制了棉花生长，但产量未受影响。
