Biological Control of the Weed Hemp Sesbania (Sesbania exaltata) in Rice (Oryza sativa) by the Fungus Myrothecium verrucaria

Agronomy

Clyde D. Boyette¹  Robert E. Hoagland² 

[1] USDA-ARS, Biological Control of Pests Research Unit, Stoneville, MS, 38776, USA; E-Mail:;USDA-ARS, Crop Production Systems Research Unit, Stoneville, MS, 38776, USA; E-Mail:

关键词: bioherbicide;    biocontrol;    hemp sesbania;    Myrothecium verrucaria;    mycelial formulation;   

DOI  :  10.3390/agronomy4010074

来源: mdpi

【 摘 要 】

In greenhouse and field experiments, a mycelial formulation of the fungus Myrothecium verrucaria (IMI 361690) containing 0.20% Silwet L-77 surfactant exhibited high bioherbicidal efficacy against the problematic weed hemp sesbania. Infection and mortality levels of 100% of hemp sesbania seedlings occurred within 48 h after fungal application in the greenhouse. In rice field tests conducted over a three year period, M. verrucaria at an inoculum concentration of 50 g L⁻¹ (dry mycelium equivalent) controlled 95% of ≤20 cm tall hemp sesbania plants. M. verrucaria also controlled larger plants (≥60 cm tall) using this high inoculum concentration. This level of weed control, as well as rice yields from plots where weeds were effectively controlled, were similar to those which occurred with the herbicide acifluorfen. These results suggest that a mycelial formulation of M. verrucaria has potential as a bioherbicide for controlling hemp sesbania in rice.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.