Thapa Sita, Darling Elisabeth, Cole Emilie, Poley Kristin, Quintanilla Marisol
Michigan State University, Department of Entomology, East Lansing, MI 48824, United States.
Agronomist, J.R. Simplot Company, Boise, ID 83706, U.S.A.
J Nematol. 2023 May 2;55(1):20230015. doi: 10.2478/jofnem-2023-0015. eCollection 2023 Feb.
Plant-parasitic nematodes (PPNs) can cause substantial economic yield losses to many agronomic crops in the United States. A regional-scale survey was completed across 20 counties to determine PPNs prevalence in Michigan corn and how factors such as soil type, tillage, irrigation, and cropping systems influence their distribution. Ten different major genera of PPNs were identified in Michigan corn fields: (needle), (spiral), (lesion), (root-knot), (cyst), (lance), or (stunt), (pin), (ring), and (dagger). No significant differences among different categories of tillage for lesion, stunt, or needle nematode prevalence was detected. Lesion nematodes were most prevalent in muck soil, while stunt nematode prevalence was significantly affected by the soil type. Needle nematodes were least abundant in irrigated soils and in contrast, stunt nematodes were higher in non-irrigated soils. Spiral nematodes were the most common PPNs in Michigan corn in all cropping systems. These findings will be helpful in planning future nematode studies in Michigan and in developing and evaluating corn nematode management strategies.
植物寄生线虫（PPNs）会给美国许多农作物造成巨大的经济产量损失。在20个县开展了一项区域规模的调查，以确定密歇根州玉米中植物寄生线虫的流行情况，以及土壤类型、耕作方式、灌溉和种植制度等因素如何影响它们的分布。在密歇根州的玉米田中鉴定出了10种不同的主要植物寄生线虫属：（针属）、（螺旋属）、（损伤属）、（根结属）、（胞囊属）、（长矛属）、或（矮化属）、（细杆属）、（环属）和（匕首属）。在损伤线虫、矮化线虫或针属线虫的流行率方面，不同耕作类别之间未检测到显著差异。损伤线虫在腐泥土中最为普遍，而矮化线虫的流行率受土壤类型的显著影响。针属线虫在灌溉土壤中数量最少，相反，矮化线虫在非灌溉土壤中数量更多。在所有种植制度下，螺旋线虫都是密歇根州玉米中最常见的植物寄生线虫。这些发现将有助于规划密歇根州未来的线虫研究，以及制定和评估玉米线虫管理策略。
