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Integrated management of Globodera rostochiensis : a novel biocontrol agent, crop rotation and fallow
Journal of Plant Diseases and Protection ( IF 2 ) Pub Date : 2020-04-22 , DOI: 10.1007/s41348-020-00325-x
Daniel López-Lima , Damaris Desgarennes , Dinorah Lima-Rivera , Gloria Carrión

A major problem for potato production worldwide is Globodera rostochiensis. Field control of this nematode is difficult because of the high reproductive rate of this genus and its resistance to biotic and abiotic factors. Biological control of nematodes is an increasingly popular strategy because it is effective and has low environmental impact. In this study, the potential of the nematophagous fungus Metarhizium carneum to mitigate the G. rostochiensis population in the presence of a susceptible potato host without previous management and during two crop cycles was evaluated, which included cultivation of the non-host faba bean followed by a susceptible potato crop. The effect of M. carneum application to the soil allowing the field to remain fallow for 2 years was also evaluated. Although M. carneum reduced the G. rostochiensis population by 33% during one potato crop cycle, the yield did not increase. With the application of M. carneum and a faba bean/potato rotation, the nematode population in the soil was reduced by 81%, with a significant increase in yield. Likewise, the use of the fungal biological control agent and the fallow period resulted in an 87% reduction in the nematode population after 2 years. Additionally, Rhizoctonia solani damage in tubers to which M. carneum was applied was lower than that in non-treated tubers in both experiments. The reduction in the population density of G. rostochiensis without the application of the biological control agent, including in the crop rotation and fallow treatments, was very low in both experiments. The combination of two management strategies, such as the use of biological control and crop rotation or a fallow period, may be a viable approach for the integrated management of G. rostochiensis in areas where high densities of this nematode occur.

中文翻译:

罗氏沼虾的综合管理:一种新型生物防治剂,作物轮作和休耕

全球马铃薯生产的一个主要问题是罗氏球藻。由于该属的高繁殖率及其对生物和非生物因子的抗性,因此很难对其进行野外控制。线虫的生物防治是一种日益流行的策略,因为它有效且对环境的影响很小。在这项研究中,对食线虫真菌的电位绿僵carneum以减轻G.线虫无需以前的管理和在两个作物周期易感宿主马铃薯的存在人口进行了评价,其中包括非宿主蚕豆培育,随后易感的马铃薯作物。卡氏杆菌的作用还评估了土壤在土壤中的休耕期为2年。尽管在一个马铃薯农作周期中,卡内莫氏杆菌使rostochiensis种群减少了33%,但产量并未增加。通过使用卡氏杆菌和蚕豆/马铃薯轮作,土壤中的线虫数量减少了81%,单产显着提高。同样,真菌生物防治剂的使用和休耕期导致2年后线虫种群减少了87%。另外,水稻纹枯病菌在块茎损坏到M. carneum在两个实验中,施药量均低于未处理的块茎。在两个实验中,没有应用生物防治剂的情况下,罗氏沼虾种群密度的降低非常低,包括在作物轮作和休耕处理中。两种管理策略的结合,例如使用生物控制和轮作或休耕期,可能是在高密度线虫病发生地区综合管理罗氏沼虾的可行方法。
更新日期:2020-04-22
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