Cover crops can suppress soilborne nematodes and fungal pathogens by serving as a poor host to pathogens and producing allelopathic compounds. Yet, cultural practices can influence their effectiveness. Cover crop and weedy fallow rotations and their interactions with deep tillage were evaluated from 2019 to 2021 in a three-season vegetable cropping system (spring tomato, fall squash, and winter cabbage) for their suppressive effects on soilborne diseases. Experimental plots were arranged in a split-plot 2 × 4 factorial design in randomized complete blocks. Whole-plot tillage treatments were shallow-tilled or deep-tilled. Subplots had two factors of crop rotations: rotation type (cover crop [spring or fall sunn hemp or winter rye] or weedy fallow) and rotation season.

中文翻译：

---

覆盖种植和深耕对抑制植物寄生线虫和土传真菌病原菌的连续效应

覆盖作物可以作为病原体的不良宿主并产生化感化合物，从而抑制土传线虫和真菌病原体。然而，文化习俗会影响其有效性。2019 年至 2021 年，在三季蔬菜种植系统（春季番茄、秋季南瓜和冬季卷心菜）中评估了覆盖作物和杂草休耕轮作及其与深耕的相互作用，以评估其对土传疾病的抑制作用。实验地块采用裂区 2 × 4 因子设计排列在随机完整区组中。全田耕作处理分为浅耕或深耕。子地块有两个作物轮作因素：轮作类型（覆盖作物[春季或秋季阳光大麻或冬季黑麦]或杂草休耕）和轮作季节。