Prevention of fungal diseases in transgenic, bialaphos- and glufosinate-resistant creeping bentgrass (Agrostis palustris)

Abstract

The antifungal activity of the herbicides bialaphos and glufosinate, the active moiety of bialaphos, was assessed. Bialaphos showed a higher level of in vitro antifungal activity againstRhizoctonia solani, Sclerotinia homoeocarpa, andPythium aphanidermatumthan glufosinate. Glufosinate suppressed the mycelial growth ofR. solaniandS. homoeocarpa, but it had no inhibitory effect onP. aphanidermatumup to the highest concentration in our testing regimes. Various concentrations of bialaphos solutions were applied to transgenic, bialaphos- and glufosinate-resistant creeping bentgrass inoculated with fungal pathogens. Bialaphos applications were able to significantly reduce symptomatic infection byR. solaniandS. homoeocarpaon transgenic plants. Bialaphos significantly inhibitedP. aphanidermatum, but not to the same degree thatR. solaniandS. homoeocarpawere inhibited. These results indicate that bialaphos may provide a means for the simultaneous control of weeds and fungal pathogens in turf areas with transgenic, bialaphos-resistant creeping bentgrass.

Interaction of Glufosinate and <i>Colletotrichum truncatum</i> on Ammonia Levels and Glutamine Synthetase Activity in Hemp Sesbania

“…It was also antifungal against pathogens of grapes (Vitis spp.) [44] [48]. Glufosinate significantly inhibited mycelial growth of Rhizoctonia solani (sheath blight disease) and S. homoeocarpa (dollar spot disease) infecting bentgrass (Agrostis palustris) [49] and also inhibited some beneficial plant soil fungi and bacteria [50].…”

Biotechnology: Herbicide-Resistant Crops

“…Glufosinate is fungitoxic (Liu et al, 1998) and bactericidal (Pline et al, 2001) and provides some level of protection from plant diseases in glufosinateresistant crops. For example, glufosinate reduced the severity of rice blast and brown leaf spot in glufosinate-resistant rice (Ahn, 2008).…”

“…Glufosinate also reduces fungal diseases in glufosinate-resistant bentgrass (Agrostis spp.) (Liu et al, 1998;Wang et al, 2003). There may be similar benefits of glyphosate in GR crops with some plant pathogens.…”

Ammonium glufosinate and triazine herbicides have side effects on soil microorganisms and pathogens

“…Íèçêîþ â÷åíèõ âñòàíîâëåíî, ùî ãëþôîñèíàò ó äîñë³äàõ çíà÷íî çíèaeóâàâ ðîçâèòîê õâîðîáè Rhizoctonia solani ³ Sclerotinia homoeocarpa â ïîëüîâèõ óìîâàõ [12]. Ãëþôîñèíàò àìîí³þ òàêîae çíèaeóâàâ óòâîðåííÿ Pythium, ÿêèé ñïðè-÷èíÿâ çáóäíèê Pythium aphanidermatum, õî÷à ãåðá³öèä íå çì³íþâàâ ð³ñò ì³öåë³þ in vitro [13].…”