Journal
BIOCONTROL SCIENCE AND TECHNOLOGY
Volume 32, Issue 2, Pages 178-195Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09583157.2021.1977240
Keywords
Microstegium vimineum; Bipolaris panici-miliacei; biological control agents; pathogenicity; evaluation
Categories
Funding
- National Key Research and Development Program [2017YFD0201300]
- USDA Forest Service Cooperative Agreement [19-IG11420000-272]
- PADD [130809001]
Ask authors/readers for more resources
Bipolaris panici-miliacei SX5-2 strain showed high pathogenicity in Microstegium vimineum, with a wide host range but severe infection in maize and sugar cane.
Control of economically important gramineous weeds has been overly dependent on chemical herbicides resulting in herbicide resistance and pollution. The development of a biocontrol technique may be an optional approach to weed control. Bipolaris panici-miliacei strain SX5-2 was isolated from diseased Microstegium vimineum plants. Pathogenicity, host range test, culture and mass production, crop sensitivity, formulation development and field trials were conducted to evaluate the potential of this strain for a bioherbicide. Pathogenicity tests showed percent incidence was up to 90% at a conidial suspension concentration of 10(5) conidia/mL on M. vimineum under greenhouse conditions and more than 80% in the field. Host range tests on 57 species in 17 families determined that B. panici-miliacei strain SX5-2 was safe for rice, wheat, sorghum, soybean, cotton, vegetables, Zoysia japonica turf and most dicotyledonous plants. Only maize and sugar cane were severely infected. Pathogenicity bioassays showed that the strain could control those seven tested gramineous weeds Digitaria sanguinalis, Panicum virgatum, Echinochloa crus-galli, Microstegium japonicum, Microstegium nodosum, Sorghum sudanense and Leptochloa chinensis in the main dryland and paddy fields. Culture and mass-production studies revealed that combined submerged and solid fermentation with bran and sawdust was feasible for mass production of conidia. Therefore, based on virulent pathogenicity and feasible mass production, B. panici-miliacei may have a promising potential to be developed into a bioherbicide for biocontrol of grass weeds in most crops but not in susceptible maize or sugarcane.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available