Abstract
ABSTRACT: Sourgrass (Digitaria insularis) is a perennial plant with high infestation potential, has fast and aggressive development, and reproduces by seeds and rhizomes. D. insularis infestations have increased in agricultural areas without cover crops established between the main crop seasons. The control of this species has become one of the most expensive in these areas in Brazil. The present work evaluated the growth and development of D. insularis plants from different vegetative parts of clumps. Two greenhouse experiments were conducted in a completely randomized design, with four replications. A 5 × 4 factorial arrangement was used, with factor A corresponding to the different propagation methods, and factor B corresponding to the biotypes used (experiment 1) and the different planting depths evaluated (experiment 2). The parameters evaluated in all experiments were: rate of tiller emergence, number of tillers, flowering time, number of inflorescences, and shoot dry weight. Fragments of different parts of the sourgrass clumps, planted at up to 7 cm depth, can generate a new plant. The management of perennial plants of sourgrass by using plows, harrows, or cultivators favors the dispersal of this species.
Highlights
Several species of the genus Digitaria (Haller) are found among weeds infesting areas of Brazil and other countries (Canto-Dorow, 2001)
Sourgrass populations resistant to fenoxaprop-p-ethyl and haloxyfop-p-methyl herbicides have recently been reported in the State of Mato Grosso (Heap, 2018), which is a major concern to producers, as ACCase inhibitors are the main herbicides for controlling postemergent D. insularis
In the experiment 1, factor A corresponded to propagation methods (RIZ = only rhizome, RIZ + RO = rhizome plus root; RIZ + CT = rhizome plus one tiller cut above the first internode; RIZ + RO + CT = rhizome plus root plus one tiller cut above the first internode; and RIZ + RO + WT = rhizome plus root plus one whole tiller), and factor B corresponded to the resistant (R1 and R2) and susceptible (S1 and S2) biotypes used
Summary
GAZOLA, T.1* ID DIAS, M.F.1 ID BONATTO, V.M.1 BELAPART, D.1 ID CARBONARI, C.A.1 ID VELINI, E.D.1 ID. ABSTRACT - Sourgrass (Digitaria insularis) is a perennial plant with high infestation potential, has fast and aggressive development, and reproduces by seeds and rhizomes. D. insularis infestations have increased in agricultural areas without cover crops established between the main crop seasons The control of this species has become one of the most expensive in these areas in Brazil. The present work evaluated the growth and development of D. insularis plants from different vegetative parts of clumps. Neste trabalho foram avaliados o crescimento e o desenvolvimento de plantas de D. insularis oriundas de diferentes partes vegetativas das touceiras. Conclui-se que fragmentos das diferentes partes das touceiras do capim-amargoso, quando expostas em até 7 cm de profundidade, podem dar origem a uma nova planta. GAZOLA, T. et al Growth and development of sourgrass plants from vegetative parts of clumps
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.
