Petrikovszki Renáta, Tóth Ferenc, Nagy Péter I
Department of Zoology and Ecology, Institute for Wildlife Management and Nature Conservation, Hungarian University of Agriculture and Life Sciences, H-2100, Páter Károly u. 1., Gödöllő, Hungary.
Research Institute of Organic Agriculture, H-1033, Miklós tér 1., Budapest, Hungary.
J Nematol. 2023 Sep 1;55(1):20230037. doi: 10.2478/jofnem-2023-0037. eCollection 2023 Feb.
While the nematicidal effectiveness of mulching against root-knot nematodes ( spp.) is calculated within organic crop protection, underlying mechanisms are not yet fully explored. Laboratory experiments were set up to determine whether mulch-derived substances cause mortality directly, or repel juveniles from crop rhizosphere. Mortality and area choice tests were conducted with mulch-derived extracts, supported by the measurements on tannic acid content and the pH values of extracts as supplementary examinations. In our study, leaf litter and straw extracts were generally found lethal to the juveniles, which is in line with the results from area preference tests. However, compost extract had no effect on juveniles. Tannic acid content showed positive correlation with mortality only in the case of straw and sycamore leaf litter extracts. Tannic acid and pH weakly correlated with repellent effect of the applied extracts generally. Our results have inspired further experiments to explore nematicidal components of leaf litters, contributing to the development of a new approach in crop protection based on the repellent effect of these materials.
虽然在有机作物保护范围内计算了覆盖物对根结线虫（ spp.）的杀线虫效果，但其潜在机制尚未得到充分探索。开展了实验室实验，以确定覆盖物衍生的物质是直接导致死亡，还是将幼虫从作物根际驱离。利用覆盖物衍生的提取物进行了死亡率和区域选择测试，并测量了提取物中的单宁酸含量和pH值作为补充检测。在我们的研究中，通常发现落叶和秸秆提取物对幼虫具有致死性，这与区域偏好测试的结果一致。然而，堆肥提取物对幼虫没有影响。仅在秸秆和梧桐树叶提取物的情况下，单宁酸含量与死亡率呈正相关。单宁酸和pH值与所用提取物的驱避效果总体上呈弱相关。我们的研究结果激发了进一步的实验，以探索落叶的杀线虫成分，有助于基于这些材料的驱避效果开发一种新的作物保护方法。
