Determination of weed hosts of soybean cyst nematode in South Dakota

Autor:	Pawan Basnet, Emmanuel Byamukama, Sharon A. Clay
Rok vydání:	2019
Předmět:	Revenue loss food.ingredient food biology Agronomy Thistle Soybean cyst nematode Plant Science biology.organism_classification Weed control Weed Agronomy and Crop Science
Zdroj:	Weed Technology. 34:377-382
ISSN:	1550-2740 0890-037X
Popis:	Soybean cyst nematode (SCN) causes over $1.2 billion in revenue loss annually in the United States and consistently ranks as the most threatening pathogen for soybean. SCN weed hosts have been documented in other states in the eastern Corn Belt, but very little work has been done in the midwestern Corn Belt. To determine alternative SCN weed hosts in South Dakota, 670 whole weed root samples comprising 63 weed species were collected from 48 SCN-positive fields in 13 counties during fall 2016 and spring 2017. Among the 63 weed species, 12 contained SCN juveniles and 7 were confirmed hosts of SCN based on the completion of the SCN life cycle in greenhouse studies. Ranking of female index (FI) for the weed hosts were purple deadnettle (FI = 34.6) > field pennycress (FI = 26.9) > common mallow (FI = 2.04) > shepherd’s purse (FI = 1.89) > white clover (FI = 1.86) > Canada thistle (FI = 1.24) > common cocklebur (FI = 1.10). These results indicate that some weeds can support SCN, and therefore a proactive weed management approach should be employed for fields infested with SCN.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d9253f3e67aa833c566773dc1ef5e5cb https://doi.org/10.1017/wet.2019.122 Zobrazit plný text záznamu