Pathogenicity of Alternaria tenuissima HZ-1 to broadleaf weeds and its safety on crops

Pathogenicity of Alternaria tenuissima HZ-1 to broadleaf weeds and its safety on crops

（Qinghai Academy of Agriculture and Forestry Science， Scientific Observing and Experimental Station of Crop Pest in Xining， Ministry of Agriculture， Key Laboratory of Agricultural Integrated Pest Management in Qinghai Province， Xining 810016， China）

Online:2016-06-25 Published:2016-06-12

Abstract

Abstract: Strain HZ-1 was identified through morphology observation and sequence analysis. The herbicidal activity of HZ-1 against 5 broadleaf weeds was evaluated by the pathogenicity of fermentation broth， and its safety to major crops in Qinghai was tested by pot bioassay. It was shown that strain HZ-1 was identified as Alternaria tenuissima. The fermentation broth of strain HZ-1 exhibited varied pathogenicity to Galium aparine， Cephalanoplos setosum （Willd.） Kitam， Chenopodium album， Malva crispa， Polygonum lapathifolium， and within these 4 species， the pathogenicity to Galium aparine and Chenopodium album was more severe. Strain HZ-1 was safe to major crops except spring rape. In general， strain HZ-1 was candidate of microbial herbicide against broadleaf weeds such as Galium aparine and Chenopodium album.

Key words: Alternaria tenuissima, broadleaf weeds, pathogenicity, crop safety

ZHU Hai\|xia， MA Yongqiang, CHENG Liang， GUO Qing\|yun*. Pathogenicity of Alternaria tenuissima HZ-1 to broadleaf weeds and its safety on crops[J]. .

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Pathogenicity of Alternaria tenuissima HZ-1 to broadleaf weeds and its safety on crops

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