Two strains Neocosmospora stercicola (Sordariomycetes, Nectriaceae) with high nematicidal activity, isolated from the cysts of Globodera sp. (Heteroderidae) in China

By

Yang, Zai-Fu
Zhang, Hui
Jiang, Zhaochun
Zhang, Xinyue
Wei, Shan
Wu, Yan
Gan, Xiuhai
Wang, Yong
Xie, Xin

Type

Article

Date of Publication

2023-4-27

Original Publication

Biodiversity data journal

Volume

11

Pages

e100684--

Subjects

nematicidal activity , nematophagous fungi , Neocosmospora stercicola , Plant-parasitic nematodes

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia Pensoft Publishers [2013]-

Identifiers

DOI: https://doi.org/10.3897/BDJ.11.e100684

 

Abstract

Plant-parasitic nematodes (PPNs) are significant pests that result in considerable economic losses in global crop production. Due to the high toxicity of chemical nematicides, there is a need to develop new strategies for nematode control. In this context, nematophagous fungi may offer a viable option for biological control. Two fungal strains (GUCC2212 and GUCC2232) were isolated from cysts of Globodera sp., identified as Neocosmospora stercicola. The fungal filtrates of the strains were evaluated for their nematicidal activity against three species of PPNs: Aphelenchoides besseyi, Bursaphelenchus xylophilus and Ditylenchus destructor. The fermentation filtrates of two strains exhibited substantial toxicity towards the evaluated nematodes, with mortality rates reaching up to 100% within 72 h. Concurrently, N. stercicola also demonstrated predatory and parasitic behavior. The eggs of Globodera sp. were parasitized by the two strains. N. stercicola represents a newly recorded species in China and a novel nematophagous species. In conclusion, the two strains of N. stercicola show promise as biocontrol agents for PPNs management.