Abstract
ABSTRACT The weed Senna obtusifolia causes severe damages to pasture areas in Brazil, due to its high production and seed spread. This study aimed to evaluate the bioherbicidal action of Phoma dimorpha fermented broth in the pre-emergence and post-emergence of S. obtusifolia. The experimental design was completely randomized, with two treatments, one with and other without the application of the fermented broth. The bioherbicidal effects were measured in bioassays of pre-emergence (germination percentage), detached leaves (phytotoxicity) and post-emergence (phytotoxicity, plant height and fresh plant mass). The application of the fermented broth provided a pre-emergence bioherbicidal action, inhibiting the seed germination in 100 %. In detached leaves, it caused leaf necrosis and death on the ninth day after the application. In the post-emergence, this application caused moderate symptoms, such as leaf spots and reduction in the weed plant size. It was concluded that the P. dimorpha fermented broth has a potential herbicidal action and, therefore, represents an alternative in the development of bioproducts for a sustainable weed control in pastures.
Highlights
The increasing weed infestation in growing areas may be responsible for significant reductions in crop yields
The weed species most frequently found in pastures, orchards, annual and perennial plants in Brazil, and in other countries, is Senna obtusifolia (L.) H
This study aimed to evaluate the bioherbicidal action of a fermented broth produced from Phoma dimorpha fungus in the pre-emergence and postemergence of S. obtusifolia
Summary
The increasing weed infestation in growing areas may be responsible for significant reductions in crop yields. Several studies confirm the toxic potential and greater competitive power of weeds over cultivated plants, which have generated losses in the quality of agricultural products, and in yield (28-68 % in large crops such as soybean and cotton), generating high economic losses (Pisula & Meiners 2010, Suriyagoda et al 2014, Bajwa et al 2016). The weed species most frequently found in pastures, orchards, annual and perennial plants in Brazil, and in other countries, is Senna obtusifolia (L.) H. S. Irwin & Barneby, popularly known in Brazil as “fedegoso”, due to its characteristic bad odor, and known as “bush-pasture”, due to the.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
